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106results about How to "Save PCB area" patented technology
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Structure and Method for Power Field Effect Transistor
ActiveUS20100301496A1Save PCB areaThin contourDecorative surface effectsSemiconductor/solid-state device detailsEngineeringField-effect transistor
A packaged semiconductor device has a metal plate (1200) with sawed sides (1200c), a flat first surface (1200a) and a parallel second surface (1200b); the plate is separated into a first section (1201) and a second section (1202) spaced apart by a gap (1230). The plate has on the second surface (1200b) at least one insular mesa (1205) of the same metal in each section, the mesas raised from the second plate surface. The device further has an insulating member (1231), which adheres to the first plate surface, bridges the gap, and thus couples the first and second sections together. The device further has a vertical stack (1270) of two power FET chips (1210) and (1220), each having a pair of terminals on the first chip surface (1211 and 1212; 1221 and 1222 respectively) and a single terminal on the second chip surface. The single terminals of chip (1210) and chip (1220) are attached to each other to form the common terminal (1240). The terminal pair (1221) and (1222) is conductively attached to plate (1200) so that terminal (1221) contacts the first plate section (1201) and terminal (1222) contacts the second plate section (1202). The terminal pair (1211) and (1212) is available for attachment to a substrate.
Owner:TEXAS INSTR INC
Multi-line scanning high-refresh-rate full-color LED driving chip and driving method
InactiveCN110277052AImprove anti-interference abilityIncrease refresh rateStatic indicating devicesShift registerPre-charge
The invention discloses a multi-line scanning high-refresh-rate full-color LED driving chip and a driving method, and belongs to the field of full-color LED driving chip design. The multi-line scanning high-refresh-rate full-color LED driving chip comprises a synchronous controller, a shift register, a state register, an SRAM buffer, a gray clock generation module, a driving module, a pre-charging circuit and an analog output module. The gray scale clock generation module is used for carrying out frequency multiplication / frequency division processing on the data clock signal DCLK according to the instruction information so as to generate a gray scale clock signal GCLK for controlling the gray scale. The driving module is used for counting the gray scale clock signal GCLK to obtain gray scale counting corresponding to each row of pixel data, and generating an output waveform of a PWM signal corresponding to each row of pixel data by using N continuous rows of pixel data and the corresponding gray scale counting in each scanning process, so that multi-row scanning is realized. The analog output module is used for receiving the PWM signal and generating constant current to drive the LED lamp bead in cooperation with the pre-charging circuit. According to the chip, the refresh rate can be improved, and more scanning lines can be supported.
Owner:HUAZHONG UNIV OF SCI & TECH
Radio frequency L-PA Mid device, radio frequency transceiving system and communication equipment
The invention provides a radio frequency LPA Mid device, a radio frequency transceiving system and communication equipment, the radio frequency LPA Mid device is configured with a first low frequencytransmitting port and at least one receiving port used for connecting a radio frequency transceiver and four alternate transmitting ports used for connecting an antenna, the radio frequency LPA Mid device comprises a transmitting circuit connected with the first low frequency transmitting port, and is used for amplifying a plurality of low-frequency-band signals received by a first low-frequency transmitting port; a receiving circuit which is connected with the plurality of receiving ports and is used for amplifying the plurality of low-frequency-band signals received by the wheel emission port and outputting the amplified signals to the receiving ports; and switching circuits which are correspondingly connected with the transmitting circuit, the receiving circuit and the four alternate transmitting ports and are used for selectively conducting the radio frequency path between the transmitting circuit and any alternate transmitting port so as to support alternate transmission of any low-frequency-band signal among the four alternate transmitting ports, so that the integration degree of the radio frequency device can be improved, and the area is saved.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
IGBT drive, and process method for driving signal
InactiveCN1917369ACancel noiseGuaranteed pulse signal amplitudeTransistorElectronic switchingSquare waveformSignal processing circuits
The invention comprises a shaping circuit, a CPLD logic controller, a pulse modulation amplification circuit, an isolating transformer, a pulse demodulation circuit and an output amplification circuit. The inputted signals are translated into the square wave through the shaping circuit, and then are inputted into the CPLD logic controller to make logic process; after outputting, the signals pass through the modulation amplification circuit to generate the sharp pulse signals that are coupled to the sublevel through the isolating transformer and reduced to PWM signals through the demodulation circuit; finally, driving the IGBT through the output amplification circuit.
Owner:MORNSUN GUANGZHOU SCI & TECH
Method for accurately controlling water feed of soybean milk machine, method for detecting material amount and method for making soybean milk
ActiveCN103405153AAccurate pump speedControl water intakeBeverage vesselsMilk substitutesStopped workWater volume
The invention relates to a method for accurately controlling water feed of a soybean milk machine. The method includes at least one step of correcting water pumping speed, according to the step, water is injected to a comminuter with small space through a water pump, when the injected water reaches a water level sensor, the water level sensor feeds back a signal to a circuit control unit to stop work of the water pump, the circuit control unit records working time of the water pump, the nominal water volume is divided by the working time of the water pump, therefore, the circuit control unit obtains and stores water pumping speed, and then water pumping time is adjusted according to the stored water pumping speed to accurately control the water injection rate. Under the condition that related structures, such as the water pump and a water pipe, of the existing soybean milk machine are fixed already, the nominal water volume is divided by the working time of the water pump to obtain the accurate water pumping speed, and the water pumping time is adjusted timely according to the calculated water pumping speed, so that the water feed is controlled accurately, and better soybean milk can be prepared in the later-period soybean milk making process.
Owner:JOYOUNG CO LTD
Lithium battery protection chip of integrated power metal oxide semiconductor field effect transistor (MOSFET) and charging circuit applying chip
InactiveCN105553052ASave PCB areaReduce areaElectric powerBattery overcharge protectionElectrical batteryEngineering
The invention relates to a lithium battery protection chip of an integrated power metal oxide semiconductor field effect transistor (MOSFET). The lithium battery protection chip is provided with six pins as follows: a positive power input end VDD, a negative power input end VSS (GND), an overcurrent detection input end / charger detection end CS, a battery core negative electrode end S1, a charging negative electrode end S2 and a power MOSFET drain common end D. The chip comprises a logic controller, an over-charging current comparator, an over-discharging voltage comparator, a short-circuit comparator, a first over-discharging current comparator, a second over-discharging current comparator, a power reset module, an oscillator module, a bandgap reference circuit, a voltage divider, a discharging overcurrent detection module, an MOSFET for charging control and an MOSFET for discharging control. The chip disclosed by the invention has protective functions of over-charging, over-discharging, overcurrent, short-circuit and the like, and the working power consumption is very low; and moreover, the area of a printed circuit board (PCB) of the chip is substantially reduced, and the chip is very suitable for various information product occasions which are very small in space limitation and require a rechargeable lithium battery to supply power for a long time. The chip adopts a small-sized package mode of DFN-5L, the chip area is further reduced, and thus, the chip cost is reduced.
Owner:SHENZHEN ZHUORUISICHUANG TECH CO LTD
RF Radio frequency transceiver, electronic device and method for adjusting work frequency band
ActiveCN105262496AFacilitate thinningImprove stabilityTransmissionWireless communicationTransceiverRadio frequency signal
The invention provides a radio frequency transceiver, an electronic device and a method for adjusting a work frequency band. The radio frequency transceiver comprises an antenna with an adjustable frequency, a transceiver, and a radio frequency front-end circuit which has an adjustable frequency and is connected between the antenna and the transceiver, wherein the transceiver is used for generating an uplink radio frequency signal based on a current network mode and / or a current frequency band; the network mode and the frequency of both the antenna and the radio frequency front-end circuit can be adjusted into the current network mode and / or the current frequency band; the uplink radio frequency signal after being processed by the radio frequency front-end circuit is transmitted out through the antenna; the antenna is also used for obtaining a downlink radio frequency signal; the downlink radio frequency signal after being processed by the radio frequency front-end circuit reaches to the transceiver; and the transceiver is also used for processing the downlink radio frequency signal.
Owner:LENOVO (BEIJING) CO LTD
Current-mode DC-DC converter
ActiveCN103490616AAchieve integrationReduce the compensation capacitor valueApparatus without intermediate ac conversionCapacitanceTransformer
The invention discloses a current-mode DC-DC converter which mainly solves the problem that an existing converter compensating circuit is difficult to integrate. The current-mode DC-DC converter comprises a feedback module (1), a compensating module (2) and a modulation module (3). The feedback module (1) is used for setting an output voltage of the converter, the compensating module (2) utilizes a transconductance amplifier to sample and amplify a current of a small capacitor so that capacitance multiplication can be achieved, and a compensating capacitance value is reduced greatly; meanwhile, the compensating module (2) compares a feedback voltage VFB and a reference voltage VREF so that an error signal VCOMP can be obtained, the modulation module (3) compares the error signal with a fixed ramp signal so that a driving signal with the corresponding duty ratio can be obtained, and regulation of the output voltage of the transformer is achieved. The compensating module (2) of the current-mode DC-DC converter can be completely integrated in a conversion chip, a pin of the conversion chip is simplified, the area of a PCB is reduced, and the current-mode DC-DC converter can be used in various portable devices small in size.
Owner:深圳德信微电子有限公司
Structure and method for power field effect transistor
ActiveUS8358014B2Low costAmenable for attaching heat sinkDecorative surface effectsSemiconductor/solid-state device detailsEngineeringField-effect transistor
A packaged semiconductor device has a metal plate (1200) with sawed sides (1200c), a flat first surface (1200a) and a parallel second surface (1200b); the plate is separated into a first section (1201) and a second section (1202) spaced apart by a gap (1230). The plate has on the second surface (1200b) at least one insular mesa (1205) of the same metal in each section, the mesas raised from the second plate surface. The device further has an insulating member (1231), which adheres to the first plate surface, bridges the gap, and thus couples the first and second sections together. The device further has a vertical stack (1270) of two power FET chips (1210) and (1220), each having a pair of terminals on the first chip surface (1211 and 1212; 1221 and 1222 respectively) and a single terminal on the second chip surface. The single terminals of chip (1210) and chip (1220) are attached to each other to form the common terminal (1240). The terminal pair (1221) and (1222) is conductively attached to plate (1200) so that terminal (1221) contacts the first plate section (1201) and terminal (1222) contacts the second plate section (1202). The terminal pair (1211) and (1212) is available for attachment to a substrate.
Owner:TEXAS INSTR INC
IGBT (insulated gate bipolar transistor) driver, signal processing method, motor control system and vehicle
ActiveCN102082563ASave PCB areaImprove safety and reliabilitySpeed controllerPulse generation by active elementsInsulated-gate bipolar transistorSignal processing
The invention discloses an IGBT (insulated gate bipolar transistor) driver, a signal processing method, a motor control system and a vehicle. The IGBT driver comprises an IGBT driving signal input circuit, a driving signal isolating circuit and a multi-IGBT output circuit which are connected in sequence, wherein the IGBT driving signals generated by the IGBT driving signal input circuit are addedto the multi-IGBT output circuit via the driving signal isolating circuit so as to drive each IGBT in the multi-IGBT output circuit to output signals. The IGBT driver also comprises a power source isolating circuit, wherein the power source isolating circuit comprises isolated output circuits individually corresponding to the IGBTs and a common output circuit corresponding to the whole of multiple IGBTs. The invention has the beneficial effects of achieving whole drive of multiple IGBTs and reducing the PCB area of the drive and protection circuit.
Owner:BYD CO LTD
Device and method for eliminating local oscillator leakage
InactiveCN108242940ASimple structureAdaptive strongTransmissionLocal oscillator signalFrequency mixer
The invention discloses a device and method for eliminating local oscillator leakage and relates to the technical field of mobile communication. The device comprises a coupler for carrying out local oscillator leakage signal extraction processing on an up-conversion signal or a down-conversion signal output by a frequency mixer to obtain a local oscillator leakage signal; an amplitude detection and adjustment module used for carrying out amplitude adjustment on the local oscillator signal according to the amplitude of the local oscillator leakage signal to obtain a local oscillator leakage amplitude offset signal equal in amplitude with the local oscillator leakage signal; and a phase detection and adjustment module used for carrying out phase adjustment on the local oscillator leakage amplitude offset signal according to the phase of the local oscillator leakage signal to obtain a local oscillator leakage offset signal equal in amplitude but opposite in phase with the local oscillatorleakage signal.
Owner:ZTE CORP
Clock management system in uTCA system and method thereof
ActiveCN101674645AReduce the difficulty of implementationSave PCB areaSynchronisation arrangementRadio transmission for post communicationFrequency conversionSource-synchronous
The invention discloses a clock management system in a uTCA system and a method thereof. The system comprises a clock management device and an SERDES clock generation unit, wherein, the clock management device comprises a reference source clock selection unit, a clock source generation unit and a clock source drive unit, the reference source clock selection unit selects a clock source from a plurality of received clock sources as a reference clock source; the clock source generation unit generates a clock source synchronous with the reference clock source according to the received reference clock source; the clock source drive unit carries out level translation on the clock source received from the clock generation unit, and transmits the clock source to the SERDES clock generation unit; and the SERDES clock generation unit carries out frequency conversion on the clock source received from the clock source drive unit, and generates desired SERDES clock. The system and the method help reduce the realization difficulty of hardware circuits, PCB area of MCH units and the cost.
Owner:ZTE CORP
PCB encoding identification method
InactiveCN105764243AReduce wearReduce the number of punch holesPrinted circuit aspectsInspection/indentification of circuitsComputer scienceBit numbering
The invention discloses a PCB encoding identification method. A drilling device processes multiple through holes on a PCB. The multiple through holes are distributed in an array and the distance between every two adjacent through hole represents a one-bit number. The multiple bits of numbers are arranged successively to form a code. When decoding is carried out, an image recognition device acquires the multiple through holes and obtains the successively arranged number codes by measuring the distance between every two adjacent through hole. The method forms an encoding identifier by drilling the PCB so as to further record the correlative information of the PCB, thereby effectively prevent the correlative information from being corroded and cleaned.
Owner:DONGGUAN ZHIJIE AUTOMATION MACHINE CO LTD
High-power high-stability variable-load high-frequency acceleration system
ActiveCN109561567ASolve the problem of low structural Q value and low accelerating voltageReduce processing difficultyMagnetic resonance acceleratorsAuto regulationHigh frequency power
The invention discloses a high-power high-stability variable-load high-frequency acceleration system. The high-power high-stability variable-load high-frequency acceleration system comprises a low-level high-frequency controller, a power amplification and transmission system and a high-frequency cavity; the power amplification and transmission system comprises a high-frequency machine, a transmission line and a coupling window; the low-level high-frequency controller is responsible for generating low-level high-frequency signals with appropriate values, and driving the high-frequency machine by the generated low-level high-frequency signals; the high-frequency machine is responsible for amplifying the low-power high-frequency signals into high-power high-frequency electromagnetic waves, and then transmitting the electromagnetic waves to the coupling window through the transmission line; the coupling window is used for coupling high-frequency power from the amplification system to the high-frequency cavity, and is characterized in that the coupling window is a dynamic adjustable coupling window; the high-frequency cavity is of a runway cavity structure; the invention further discloses an automatic adjustment coupling degree algorithm of the high-power high-stability variable-load high-frequency acceleration system, wherein the algorithm comprises the steps that a dynamic reflection power adjustment coupling degree algorithm is initialized; and the final calculation formula of the dynamic reflection power adjustment coupling degree is obtained.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Power supply and electrical equipment
InactiveCN106100374AReduce volumeImprove conversion efficiencyAc-dc conversionDc-dc conversionTransformerInductor
The invention discloses a power supply and electrical equipment. The power supply is composed of an LLC control circuit, an input rectification circuit, a switch circuit, and an LLC transformer. The LLC transformer includes an EQ type transformer and a leakage inductor arranged outside the EQ type transformer. The input rectification circuit rectifies inputted commercial power into a direct current. The LLC control circuit controls connection or disconnection of a switch module, so that the direct current outputted by the input rectification circuit is converted into a pulsating direct current that is then transmitted to the LLC transformer. The LLC transformer carries out voltage conversion on the inputted pulsating direct current inputted and then outputs the processed current to a load. According to the technical scheme, the power conversion efficiency is improved; and the power occupied space is reduced.
Owner:SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
DC/DC power supply conversion system
ActiveCN111313707AImprove conversion efficiencySave PCB areaBatteries circuit arrangementsEfficient power electronics conversionPower switchingInductor
The invention discloses a DC / DC power conversion system which comprises a first power switch and a second power switch. The first power switch comprises at least four power switches which are connected in series; the second power switch comprises at least four power switches which are connected in series; the first power switch and the third power switch of the second power switch are controlled by a first duty ratio, and the second power switch and the fourth power switch of the second power switch are controlled by a second duty ratio. The system further comprises two groups of resonance components which respectively act on the first power switch and the second power switch, a first output filter inductor and a second output filter inductor which are respectively used for averaging switching voltage from the first power switch and the second power switch, and a fifth power switch which acts on one group of resonance components. The DC / DC power conversion system has the advantages ofhigher conversion efficiency, less external components and smaller PCB area.
Owner:HALO MICROELECTRONICS CO LTD
Method and device for starting processor
ActiveCN102253844ASimplify the maintenance processSave PCB areaProgram loading/initiatingMaster processorPrinted circuit board
The embodiment of the invention relates to the technical field of communication and in particular relates to a method and device for starting a processor so as to solve the problems that external program loading interfaces are too many and too much PCB (printed circuit board) area is occupied as the master and slave processors respectively need a program memory, and the maintenance process of the boot program and software program files is excessively complicated in the prior art. The method provided by the embodiment of the invention comprises: after initialization, the master processor executes a first software program file required by the master processor in a program loader to finish the start, and stores the starting parameter and the program loader into a first memory corresponding to the master processor from the second software program file required for the slave master; and after the initialization, the slave processor finishes the start through the starting program and second software program file in the first memory. The method provided by the embodiment of the invention can be used for reducing the external program loading interfaces, reducing the PCB area and simplifying the maintenance process of the boot program and software program file.
Owner:DATANG MOBILE COMM EQUIP CO LTD
Method and device for implementing electrically erasable programmable read-only memory
InactiveCN102063939ASimplify the mass production processEasy to upgradeRead-only memoriesProgrammable read-only memoryComputer module
The invention discloses a method and a device for implementing an electrically erasable programmable read-only memory (EEPROM). The device comprises a control module and an EEPROM interface protocol module, wherein the control module automatically writes data to be written into the EEPROM into a memory capable of replacing the EEPROM by running online software, and the written data is read from the memory capable of replacing the EEPROM and written into a cache; and the EEPROM interface protocol module reads corresponding data from the cache according to a read address given by equipment about to access the EEPROM, and sends the data to the equipment. The control module can automatically complete the operation of writing configuration data into the EEPROM without manual operation, the procedure for volume production of products is simplified, and the upgrade of the products is facilitated; meanwhile, the area of a printed circuit board (PCB) is saved, so the hardware cost of the products is reduced.
Owner:ZTE CORP
Television with multiplexing of USB (Universal Serial Bus) interface and method for multiplexing USB interface
InactiveCN102655577ASave PCB areaLow costTelevision system detailsColor television detailsInput/outputSerial port
The invention discloses a television with multiplexing of a USB (Universal Serial Bus) interface and a method for multiplexing the USB interface. The television comprises the USB interface, a multimedia signal processing unit, a serial-port signal processing unit, a switching circuit, an I / O (Input / Output) control unit, an input unit and a central processor, wherein the USB interface is connected with the multimedia signal processing unit and is connected with the serial-port signal processing unit by the switching circuit; the output of the I / O control unit is connected to the control end of the switching circuit; the central processor is respectively connected with the multimedia signal processing unit, the serial-port signal processing unit and the I / O control unit; and the output of the input unit is connected to the central processor. The invention has the advantages that the switching circuit is connected between the USB interface and the serial-port signal processing unit, the connection between the serial-port signal processing unit and the USB interface is isolated by utilizing the switching circuit, and when the isolation needs to be realized, the switching circuit is controlled by the I / O control unit, so that the USB interface not only can be used as a multimedia input interface, but also can be multiplexed as a serial port to complete all the functions of the serial port.
Owner:XIAMEN OVERSEAS CHINESE ELECTRONICS ENTERPRISE
Flasher chip
ActiveCN103702482ASave PCB areaLow internal quiescent currentElectric light circuit arrangementCapacitanceDriver circuit
The invention discloses a flasher chip, which comprise a CEXT capacitor charging module, an oscillator, a counter module, a power voltage detection circuit, a light load detection circuit, a logical control circuit, an over-temperature protection circuit, a current limiting circuit, a power tube driving circuit and a power tube. The frequency of the flasher chip is controlled by an internal circuit and is irrelevant to an external capacitor; moreover, the control accuracy of the frequency is high, peripheral elements can be reduced, the area of a PCB (Printed Circuit Board) is small, and the functions of light load automatic detection, over-temperature protection and the like are realized.
Owner:无锡迈尔斯通集成电路有限公司
TEC temperature control driving circuit and control strategy thereof
The invention discloses a TEC temperature control driving circuit which is characterized in that the circuit comprises a linear regulator LDO, a current absorbing circuit and a switching power supply SW circuit. The output end of the linear regulator LDO is connected with the LDO terminal of a TEC to provide input voltage V-LDO. The output end of the switching power supply SW circuit is connected with the SW end of the TEC to provide input voltage V-SW. According to the current absorbing circuit, when V-LDO is greater than V-SW, disconnection is carried out, and current flows from the linear regulator LDO into the TEC; when V-LDO is less than V-SW, breakover is carried out, and current flows from the TEC to the current absorbing circuit. According to the invention, a new LDO+SW topology circuit structure is designed, and the advantages of small LDO ripple and high SW efficiency are combined; the current absorbing circuit is added on the LDO terminal, so that the LDO terminal can output current and absorb current; and the same circuit is used to drive the TEC to carry out heating or refrigeration.
Owner:NANJING MOVELASER TECH CO LTD
HDMI and MHL input compatible type transfer device and head-mounted display apparatus
InactiveCN104065907ASave PCB areaReduce manufacturing costTelevision system detailsColor television detailsHDMIComputer science
The invention provides an HDMI and MHL input compatible type transfer device and a head-mounted display apparatus, and pertains to the technical field of signal transfer. The HDMI and MHL input compatible type transfer device comprises: an HDMI input interface for inputting an HDMI signal; an HDMI-to-MHL chip which is connected with the HDMI input interface for converting the HDMI signal received from the HDMI input interface into a MHL signal; an HDMI-to-MHL output interface which is connected with the HDMI-to-MHL chip for outputting the MHL signal converted by the HDMI; a MHL input interface which is connected with the HDMI-to-MHL output interface for receiving the MHL signal and transmitting the MHL signal; and a MHL cable which is connected with the MHL input interface for transmitting the MHL signal. According to the invention, advantages of simple structure and reasonable cable configuration can be realized, through the HDMI-to-MHL chip, an HDMI signal can be converted into a MHL signal, and the MHL signal can be transmitted to the mainboard of the head-mounted display apparatus through the MHL cable, so not only the HDMI signal and MHL signal input compatibility can be realized, and but also the overall weight of the head-mounted display apparatus can be reduced because the MHL cable has the advantage of reduced occupied space and has the advantage of less weight compared with an HDMI cable.
Owner:QINGDAO GOERTEK
Constant-current control circuit for isolated switching power supply
ActiveCN102255507ASimple structureSave PCB areaDc-dc conversionElectric variable regulationPrinted circuit boardSwitching power
The invention discloses a constant-current control circuit for an isolated switching power supply. The isolated switching power supply comprises a primary part and a secondary part which are coupled by a transformer, wherein the primary part provides input voltages, and the secondary part provides output voltages; the primary part comprises an input voltage detection circuit, a turning-off time control circuit and a power switching tube; the input voltage detection circuit is used for detecting the input voltages; and the turning-off time control circuit is used for adjusting the turning-off time of a power switching tube in accordance with the changes of the input voltages relative to first reference voltages. The constant-current control circuit solves the problems that a circuit in theprior art is limited in some specific applications because the circuit structure is complicated, more components are used and the larger PCB (printed circuit board) area is occupied; and the cost is higher.
Owner:MAXIC TECHNOLOGY CORPORATION
Communication apparatus equipped with switchable antenna
ActiveUS9380640B2Save spaceSave PCB areaSpatial transmit diversitySimultaneous aerial operationsEngineeringPrinted circuit board
A communication apparatus equipped with switchable antenna mechanism is provided, where the communication apparatus includes at least a portion of a portable electronic device, which includes a plurality of wireless communication functions respectively corresponding to different communication standards, and the wireless communication functions include a mobile phone function and at least one other wireless communication function. The communication apparatus includes: an antenna; a processing circuit; a plurality of processing modules arranged to provide the portable electronic device with a plurality of functions, respectively, where the functions include at least a portion of the wireless communication functions; and a switching unit. It is an advantage that, by utilizing the switching unit, different portions of the communication apparatus can share the antenna to achieve the best beneficial result through the limited area of a printed circuit board (PCB).
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
A battery protection system
ActiveCN105576777BLow costLower impedanceSafety/protection battery circuitsElectric powerEngineeringProtection system
Owner:ZAOZHUANG HANQI COMM TECH CO LTD
Patch antenna and patch antenna manufacturing method
ActiveCN106384882ASolve the problem of low space utilizationSave PCB areaRadiating elements structural formsPolarised antenna unit combinationsPhysicsPatch antenna array
The invention discloses a patch antenna and a patch antenna manufacturing method, which relate to the field of communication, and are used to solve the problem that the adoption of a dual-polarized antenna results in low PCB space utilization rate. The patch antenna comprises a first patch antenna array and a second patch antenna array. The first patch antenna array comprises M first patch dipoles and a first feed network. The second patch antenna array comprises N second patch dipoles and a second feed network. The M first patch dipoles and the N second patch dipoles share L patch dipoles. The adjacent patch dipoles belonging to the same patch antenna array are electrically connected with one another. The first feed network is electrically connected with the first patch dipoles along a first polarization direction, the second feed network is electrically connected with the second patch dipoles along a second polarization direction, and the first polarization direction is different from the second polarization direction. The embodiment of the invention is applied to the design of a dual-polarized patch antenna.
Owner:RUIJIE NETWORKS CO LTD
Resistor type touch key device and method for realizing resistor type touch key
ActiveCN101963875AImprove anti-interference abilitySave PCB areaElectronic switchingInput/output processes for data processingKey pressingInterference resistance
The invention relates to the field of touch keys, and discloses a resistor type touch key device and a method for realizing the resistor type touch key. The method comprises the following steps: A, extending coordinate electrodes at two ends of two conductive layers of a resistor type touch screen to form key electrodes; and B, distributing the key electrodes on positions corresponding to an upper circuit layer and a lower circuit layer, and adding an insulating point layer between the upper circuit layer and the lower circuit layer. A low-cost resistor type touch key is realized by extendingthe electrodes (generally silver pulp lines) of the conductive layer of the resistor type touch screen and using the principle of resistor type touch control. By adopting the device and the method, the interference resistance can be effectively improved, and because the conventional resources are used, components and parts are reduced, the PCB area is reduced, and cost is saved.
Owner:湃勒斯智能科技(山东)有限公司
Self-protection H bridge driving circuit
ActiveCN103580464AReduce in quantityIncrease flexibilityPower conversion systemsDriving currentDiagonal
The invention provides a self-protection H bridge driving circuit. The self-protection H bridge driving circuit comprises an H bridge driving unit and an H bridge driving control unit. Four switch elements are located on diagonal lines, an upper left and lower right driving branch is formed by the switch element of an upper left arm and the switch element of a lower right arm, an upper right and lower left driving branch is formed by the switch element of an upper right arm and the switch element of a lower left arm, and the H bridge driving control unit controls the two driving branches to be connected alternately and controls the direction of a load current; in the same driving branch, one switch element controls output of the load driving current, and the other switch element controls the duty ratio of the load driving current. When one or two switch elements on one driving branch in the H bridge driving unit are connected, the H bridge driving control unit stops the two switch elements on the other driving branch from being connected, and thus the self-protection function is achieved. Because the independent switch elements are adopted by the H bridge driving unit to built the driving circuit, when different loads are driven by the circuit, the switch elements different in driving capacity can be selected according to currents required for driving the loads, and thus the self-protection H bridge driving circuit is high in flexibility.
Owner:成都威特电喷有限责任公司
Radiofrequency receiving chip and method for manufacturing same
InactiveCN101721821ASave PCB areaReduce noiseTransmission systemsSolid-state devicesMotor driveControl signal
The invention discloses a radiofrequency receiving chip. The radiofrequency receiving chip is simultaneously integrated with at least two of the following modules: a radiofrequency receiving module, a radiofrequency decoding latching module and a motor driving module, wherein the radiofrequency receiving module is used for mixing a received RF signal from a high frequency to a medium and low frequency, amplifying the RF signal and outputting the RF signal to the radiofrequency decoding latching module; the radiofrequency decoding latching module is used for demodulating a data code flow input by the radiofrequency receiving module so as to generate various driving control signals; and the motor driving module is used for receiving a driving control signal so as to drive a corresponding external motor. The invention also discloses a method for manufacturing the radiofrequency receiving chip. The radiofrequency receiving chip and the method for manufacturing the same integrate the radio frequency receiving module, the radiofrequency decoding latching module and the motor driving module on one radiofrequency receiving chip to save the system cost and the labor cost, and isolate the noise among the modules and substrate disturbances so as to improve the stability of the system.
Owner:HANGZHOU SILAN MICROELECTRONICS
OCT spectral signal acquisition and transmission system based on ZYNQ
InactiveCN110336928ASave PCB areaWide applicabilityTelevision system detailsColor television detailsData transmissionOptical fiber connector
An OCT spectral signal acquisition and transmission system based on ZYNQ comprises a spectral signal generation unit and a data acquisition and transmission unit, and the spectral signal generation unit comprises an optical fiber connector, a collimation system, a transmission type grating and a focusing lens; the data acquisition and transmission unit comprises a linear array CCD sensor module, apre-amplification module, an analog-to-digital conversion module, a ZYNQ module, a DDR3 data cache module, a USB3.0 data transmission module, a synchronous trigger module and a power supply module. According to the invention, the requirements of the OCT technology in a rapid, large-data-volume and high-resolution transmission scene can be met.
Owner:ZHEJIANG UNIV OF TECH
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