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180results about How to "Stable power supply voltage" patented technology
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Solid state image sensing device
ActiveUS20050001905A1Improve the immunityImprove stabilityTelevision system detailsPrinted circuit detailsImage sensingHigh potential
Each of a pair of power supply electric lines (11 and 12) connected to power supply pads of a solid state image sensor (1) and a pair of power supply electric lines (13 and 14) connected to power supply pads of an integrated circuit chip (2) is arranged so that the power supply electric lines included in each power supply electric line pair are in parallel with each other and has a very small gap between them. The power supply electric lines (11 to 14) have a certain width and bend portions that are curved smoothly with a predetermined curvature or less and are formed on a flexible wiring board (3). In each of the solid state image sensor (1) and the integrated circuit chip (2), the high-potential and low-potential power supply pads are arranged side by side.
Owner:RENESAS ELECTRONICS CORP
Voltage detection and power failure protection device and implementation method
InactiveCN102355046AStable power supply voltageNo volatilityEmergency power supply arrangementsElectricityVoltage stability
The invention discloses a voltage detection and power failure protection device, which is used for keeping the voltage stability of a load. The device comprises a voltage detection module, a voltage stabilization circuit module, an energy storage and power supply module, a control module, a switch module and a power supply switching voltage stabilization module, wherein the switch module comprises a second switch and a third switch; a power supply is connected with one end of each of the second switch, the energy storage and power supply module and the voltage detection module; the other end of the second switch is connected with one end of the voltage stabilization circuit module; the other end of the energy storage and power supply module is connected with one end of the third switch; the other end of each of the voltage stabilization circuit module and the third switch is connected with the load by the power supply switching voltage stabilization module; and the control module is connected with the second switch, the third switch, the voltage detection module and the power supply switching voltage stabilization module. The voltage detection and power failure protection device provided by the invention can keep the power supply voltage stability of the load when the output of the power supply is instable, and may not cause voltage fluctuations of the load, thereby meeting the requirements of a user on the voltage stability of the load.
Owner:TCL NEW TECH HUIZHOU
Front end module
ActiveUS20070058748A1Efficient arrangementMade smallModulated-carrier systemsSolid-state devicesEngineeringGround pattern
A front end module having a multilayered structure is provided. The front end module includes a transmitter, a receiver, and a duplex unit. A ground layer is provided with an ground pattern having a plurality of separated blocks on a surface of a substrate of the front end module.
Owner:LG INNOTEK CO LTD
Power supply system and power supply redundant control circuit thereof
ActiveCN103457346AStable power supply voltageResolve failureEmergency power supply arrangementsOvervoltageControl circuit
The invention provides a power system and a power supply redundant control circuit thereof, and relates to the field of power supply circuits. The power supply redundant control circuit comprises a first switch unit, a first undervoltage detection and drive unit, a first overvoltage detection and drive unit, a second switch unit, a second undervoltage detection and drive unit, a second overvoltage detection and drive unit, a first power switch and surge protection unit and a second power switch and surge protection unit. By means of the power supply redundant control circuit, real-time undervoltage and overvoltage detection is carried out on two power supplies, work state monitoring is carried out on an output stage, according to the work state of the two power supplies, seamless power supply switching is achieved so that a load can obtain stable power supply voltage and work normally, and the problems that in the prior art, power cannot be stably supplied to a load, load failure tends to occur, and when the load is short-circuit, failure of multiple power supplies tends to occur are solved.
Owner:EVOC SMART IOT TECH CO LTD
Rail traction AC cophase supply apparatus based on three-phase series voltage source type symmetry transformation
InactiveCN101345483AStable power supply voltageHigh-speed heavy-duty operationConversion with intermediate conversion to dcTransformers/inductances coils/windings/connectionsPower factorLow voltage
The invention relates to a dc cophase power supply device of a railway traction based on symmetric transformation of three-phase serial voltage sources. The full three-phase input voltages are divided into a plurality of independent lower voltages to form power units, thereby recombined adjusting resource is formed. A single-phase ac output is formed by serial superposition after the rectification-energy storage filter-inversion transformation of each power unit, a negative sequence current is eliminated, the power factor is improved and the harmonic wave is eliminated by using multiple principles of the input and the output. The device can realize the cophase power supply of a railway traction, make fully use of the capacity of the circuit and device, reduce the damage to the power supply system from the reactive current and harmonic wave, decrease the loss, reduce the pollution to the environment, greatly improve the reliability of train and reduce the operation, management and maintenance cost. The device is convenient to apply, and is suitable for requirement of high speed and overloading development.
Owner:BEIJING IAE ELECTRICAL
Set-top box and switching power supply circuit thereof
InactiveCN102802062AVersatilityImprove versatilityDc-dc conversionSelective content distributionFeedback circuitsEngineering
The invention discloses a set-top box and a switching power supply circuit thereof. The set top box comprises a mainboard circuit and a switching power supply circuit used for providing DC supply voltage to the mainboard circuit, wherein the switching power supply circuit comprises a voltage sampling feedback circuit used for detecting the supply voltage on the mainboard circuit and outputting a feedback signal according to the detected voltage, and a switching power supply feed circuit used for automatically regulating the DC supply voltage output to the mainboard circuit according to the received feedback signal. As the voltage sampling feedback circuit detects the supply voltage on the mainboard circuit, the feedback signal is output to the switching power supply feed circuit and the switching power supply feed circuit automatically regulates the output voltage according to the feedback signal, the stability of the supply voltage on the mainboard circuit is guaranteed.
Owner:HISENSE BROADBAND MULTIMEDIA TECH
Semiconductor device
InactiveUS20100059806A1Reduce parasitic capacitanceAvoid smallTransistorSemiconductor/solid-state device detailsCapacitanceEngineering
A semiconductor device is proposed in which signal delay due to compensation capacitance elements in peripheral circuit element regions is eliminated. The semiconductor device includes: a first region including memory cells; a second region 10 including a functional circuit; cell capacitors formed in the first region; and compensation capacitance elements 36 to 38 formed in the second region 10, wherein the compensation capacitance elements 36 to 38 each include a lower electrode 36, a capacitance insulating film 37, and an upper electrode 38, the lower electrode 36, capacitance insulating film 37, and upper electrode 38 being the same as those of the cell capacitors, and wherein the compensation capacitance elements are formed over an upper layer of the second region 10 excluding upper layer portions of drain diffusion layers 44, 46 or gate electrodes 32 of transistors in the functional circuit.
Owner:RENESAS ELECTRONICS CORP
Non-contact type dynamic power supply system coil for trains in rail transit
InactiveCN106532980AReduce the coupling coefficientThe coupling coefficient is stableTransformersCircuit arrangementsCapacitanceElectrical polarity
The invention discloses a non-contact type dynamic power supply system coil for trains in the rail transit. The coil comprises energy emission coils laid along tracks and energy picking coils installed at the bottoms of the trains. Each energy emission coil comprises multiple segments of uni-polarity coils and dual-polarity coils, which are equal in length and width and successively alternatively laid. A compensation filtering loop where the corresponding energy emission coil is arranged is parallelly connected to a high-frequency alternating-current power supply H. The energy picking coils comprise a uni-polarity coil and a dual-polarity coil, which are equal with the energy emission coils in length and width. The uni-polarity coils are serially connected with a capacitor and then parallelly connected to the input end of a rectifier K1. The dual-polarity coils are serially connected with a capacitor and then parallelly connected to the input end of a rectifier K2. The output end of the rectifier K1 and the output end of the rectifier K2 are serially connected and then connected to a motor G. According to the invention, decoupling of the energy emission coils is achieved; and the energy picking coils pick stable induced electromotive force during a moving process.
Owner:SOUTHWEST JIAOTONG UNIV
Front end module
ActiveUS7768792B2Improve efficiencyImprove solderabilityModulated-carrier systemsSolid-state devicesEngineeringGround pattern
A front end module includes a multilayered structure. The multilayered structure includes a transmitter, a receiver, and a duplex unit. The multilayered structure further includes a ground layer. The ground layer includes a ground pattern having at least one block on a surface of a substrate of the front end module.
Owner:LG INNOTEK CO LTD
Electrode Catalyst for Fuel Cell
InactiveUS20090081511A1Improve catalytic performanceStable power supply voltageHeterogenous catalyst chemical elementsActive material electrodesPolymer electrolyte fuel cellsPolymer
Owner:NIPPON SHOKUBAI CO LTD
Large power modularized DC power supply apparatus and control method thereof
InactiveCN101364732AImprove power factorReduce harmonic contentDc network circuit arrangementsElectric power transfer ac networkTransformerHarmonic
The invention relates to a large-power modularized DC power supply device and a control method thereof. The large-power modularized DC power supply device is composed of three two-way power units and a transformer with zigzag connection. Each two-way power unit includes twelve reverse-conducting IGBTs forming six bridge arms, wherein each bridge arm is connected with primary windings Tx1, Tx2 and Tx3 of the transformer with zigzag connection. A voltage and current sensor is also connected. The AC-side voltage of the two-way power unit is superposed with the phases of fifteen secondary windings in zigzag connection; a filter capacitor is connected between every two phases to generate three-phase symmetrical 18 ladder wave AC line voltages; and the DC sides of the two-way power units are connected with each other in parallel. The power supply device and the control method thereof have the advantages of stable DC output voltage, fast system response, good controllability, and less harmonic wave pollution at the AC sides, and particularly can achieve energy feedback from the DC side to the AC side and two-way energy transmission between the DC side and the AC side, thereby achieving positive effect on energy saving and emission reduction.
Owner:BEIJING JIAOTONG UNIV +1
High-stability and low-power-consumption on-chip OSC circuit
PendingCN106877863ASimple circuit structureReduce power consumptionPulse automatic controlCapacitancePower consumption
The invention discloses a high-stability and low-power-consumption on-chip OSC circuit comprising a charge and discharge circuit and a control circuit. As for the charge and discharge circuit, charge and discharge of a capacitor are performed by a current source, and charge and discharge of the capacitor are controlled by a switching tube. As for the control circuit, the level state outputted by the charge and discharge circuit is converted to generate the final output signal of an oscillator, and the output signal of the oscillator controls on / off of the switching tube in the charge and discharge circuit. The circuit is simple in structure and low in power consumption so that the oscillation output function can be realized; as for the current source, current mirroring is performed by a cascode current mirror so that the stability of the generated current I1 and I2 is high, and the oscillation frequency of the OSC circuit is enabled to be stable; and an NMOS transistor M13 is a decoupling capacitor so that the power voltage can be stabilized, the generated current is enabled to be stable, the stability of the oscillation frequency of the OSC circuit can also be enhanced and the noise is low. The comparator and the control part in the prior art are omitted, and a phase inverter, a two-input NOR gate and an RS trigger are adopted so that chip area occupation is small.
Owner:湖南芯力特电子科技有限公司
Light emitting element driving apparatus
InactiveUS20100052572A1Stable power supply voltageImprove pressure resistanceElectrical apparatusStatic indicating devicesDriving currentFeedback circuits
The N light emitting element groups each include one or more light emitting elements. The power source circuit includes a control input terminal and supplies the power source voltage to the N light emitting element groups. The N current driving circuits, each including a feedback output terminal, generate N drive currents for driving the respective N light emitting element groups and generate main feedback voltages at the feedback output terminals based on the power source voltage. The main feedback circuit applies a main feedback signal to the control input terminal based on the N main feedback voltages. The auxiliary feedback circuit applies an auxiliary feedback signal to the control input terminal based on the power source voltage. The power source circuit adjusts the power source voltage based on at least one of the main feedback signal and the auxiliary feedback signal.
Owner:PANASONIC CORP
Conversion device for quick charger and method for realizing charging conversion
ActiveUS20180166889A1Stable power supply voltageImprove conversion performanceElectric powerBattery overcurrent protectionVoltage regulator moduleFast charging
Disclosed a conversion device for a quick charger, comprising an input end, a voltage regulator module, a recognition module, a control module and an output end, wherein, the voltage regulator module receives a power voltage through the input end to stabilize a voltage, and outputs the power voltage after voltage stabilization to the recognition module and the control module; the control module reads a conversion voltage of the output end, and produces a conversion signal group according to the conversion voltage to output to the recognition module; and the recognition module produces a handshake signal and a voltage recognition signal according to the conversion signal, and outputs through the input end. Through the device and method, equipment that are not quickly charged may also be charged by the quick charger, so that an application scope of the quick charger is expanded.
Owner:SHENZHEN LVSUN ELECTRONICS TECH
Power supply method and device for alternating-direct current locomotive upon unpowered conveying
PendingCN107696866AStable voltageGuaranteed stabilityBatteries circuit arrangementsRailway vehiclesTraction motorElectricity
A power supply method for an alternating-direct current locomotive upon unpowered conveying is characterized in that a power supply device for an alternating-direct current locomotive is disposed on the locomotive, a locomotive battery is used to provide exciting power for a traction motor through an exciting chopper module of the power supply device, the traction motor enters power generation state to power a locomotive load, and after the traction motor enters the power generation state, the exciting chopper module uses the power generated by the traction motor to continuously provide exciting power for the traction motor. After the traction motor enters the power generation state, the power generated by the traction motor is used to provide exciting power for the traction motor, and itis ensured that in the power generation process, the exciting power is continuously supplied so that the traction motor can generate power continuously and stably; by monitoring, in real time, speed of the traction motor, voltage and current of two ends of a traction motor armature and output current of the exciting chopper module, the magnitude of exciting current output by the exciting chopper module can be adjusted according to monitored values to ensure that power generated by the traction motor has stable voltage.
Owner:株洲中车电气科技有限公司
Solid state image sensing device
ActiveUS7589787B2Improve the immunityImprove stabilityTelevision system detailsPrinted circuit detailsEngineeringImage sensing
Each of a pair of power supply electric lines (11 and 12) connected to power supply pads of a solid state image sensor (1) and a pair of power supply electric lines (13 and 14) connected to power supply pads of an integrated circuit chip (2) is arranged so that the power supply electric lines included in each power supply electric line pair are in parallel with each other and has a very small gap between them. The power supply electric lines (11 to 14) have a certain width and bend portions that are curved smoothly with a predetermined curvature or less and are formed on a flexible wiring board (3). In each of the solid state image sensor (1) and the integrated circuit chip (2), the high-potential and low-potential power supply pads are arranged side by side.
Owner:RENESAS ELECTRONICS CORP
Lighting fixture for visible light communication and visible-light-communication system with same
ActiveUS20140334826A1Stable power supply voltageInhibitionElectroluminescent light sourcesClose-range type systemsSignal onEngineering
A lighting fixture for visible light communication is configured to modulate light intensity of a light source (11) comprising a light-emitting device (2) to superpose a communication signal on illumination light. The lighting fixture includes: a power supply circuit (3) configured to control light output of the light source (11) based on a dimming signal; a switch device (Q1) for modulating an output current from the power supply circuit (3) to the light source (11); an impedance element (Rx); a communication circuit (4); and an ON circuit (6). The communication circuit (4) is configured to supply a modulation signal to a side of the switch device (Q1) to superpose the communication signal on the illumination light. The ON circuit (6) is configured to turn on the switch device (Q1) by supply power from the power supply circuit (3) when the communication circuit (4) is inactivated.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Card getting self-help service equipment and card getting method
ActiveCN105869302ASave booster partsEasy access to cardsApparatus for meter-controlled dispensingComputer hardwareDisplay device
Owner:广州市华标科技发展有限公司
Transmission noise suppressing structure and wiring circuit board
InactiveUS20100201459A1Stable power supply voltageReducing signal transmission line cross talkCurrent interference reductionCross-talk/noise/interference reductionEngineeringPower supply voltage
The invention provides a transmission noise suppressing structure and a wiring board capable of suppressing a transmission noise transferred through a power supply line, stabilizing a power supply voltage, and reducing signal transmission line cross talk transmitted through the power supply line or a ground layer without being affected by a resistive layer. A transmission noise suppressing structure includes a power supply line and a signal transmission line arranged apart from each other on the same surface; a ground layer arranged apart from the power supply line and the signal transmission line; and a resistive layer arranged apart from the power supply line and the ground layer. The resistive layer has an area (I) which faces the power supply line and an area (II) which does not face the power supply line. The resistive layer and the signal transmission line are apart from each other.
Owner:SHIN-ETSU POLYMER CO LTD
Sliding mode control method of step-down direct current converter based on exponential power reaching law
ActiveCN109901391AStable power supply voltageEasy to adjustAdaptive controlControl parametersDirect current
The invention discloses a sliding mode control method of a step-down direct current converter based on an exponential power reaching law. The method comprises the following steps of (1) establishing astep-down direct current converter system model under a time-varying disturbance effect, initializing a system state and a control parameter, and converting into a disturbed model of the step-down direct current converter; (2) designing an unknown input observer to estimate a time-varying disturbance existing in a step-down direct current converter system; and (3) designing a sliding mode controller based on the unknown input observer and the improved exponential power reaching law, and making the step-down direct current converter system output a stable power voltage. By using the control method, composite control of the time-varying disturbance problem in the system is realized, and control precision and anti-interference performance of the system are improved. And compared with ordinary sliding mode control, by using the method of the invention, an output voltage error convergence time speed is fast, and the improved exponential power reaching law has a faster reaching rate and shorter reaching time, and output chattering is restrained.
Owner:ZHEJIANG UNIV OF TECH
Semiconductor integrated circuit device and wireless communication system
InactiveUS20060148416A1Improve rendering capabilitiesLarge parasitic capacitancePower managementRadio transmissionEngineeringCurrent consumption
The present invention supplies a stable power supply voltage from small output currents to large output currents, regardless of operation states of a semiconductor integrated circuit device. When an output current of the regulator is small (idle mode), all switches go off. Thereby, power is supplied to a transistor via resistors, a load of a transistor becomes large, and current consumption of the regulator can be reduced. Since a transistor goes off, parasitic capacitance can be reduced, and a sufficient phase margin can be ensured between output of a differential voltage comparator and an output signal of the regulator. In normal operation, all the switches go on, load resistance is reduced to reduce noise, and driving capability is improved to supply stable power supply voltages.
Owner:RENESAS TECH CORP
Power supply circuit and semiconductor integrated circuit apparatus
InactiveCN1581006AAvoid accessReduce consumptionVolume/mass flow measurementPower supply for data processingElectrical batteryIntegrated circuit
In a power supply circuit, when switches are turned off, current flows from a battery power supply line through resistors, input terminals, diodes and a terminal and further from a terminal into IC. When a microcomputer operates in a low power consumption operating mode, the power supply voltage is higher than a target voltage, and a control voltage output from an operational amplifier increases, so that a transistor is turned off. At this time, a current sink circuit operates and a transistor is turned on, so that excessive current flows into the current sink circuit to suppress increase of the power supply voltage.
Owner:DENSO CORP
Master-slave type leading load compensation voltage stabilizer
ActiveCN103186159AThe supply voltage remains stableImprove circuit load performance and work reliabilityElectric variable regulationSelf adaptiveVoltage reference
The invention provides a master-slave type leading load compensation voltage stabilizer which is applied to a circuit of an internal memory buffer; the master-slave type leading load compensation voltage stabilizer comprises a voltage stabilization unit, a master-slave type output stage, a master control unit and an output stage control unit, wherein the voltage stabilization unit is provided with an input end used for receiving reference voltage and feedback voltage, and an output end used for generating regulation voltage; the master-slave type output stage comprises a master output stage and a plurality of slave output stages; the master control unit is used for monitoring the working condition of a circuit load in the internal memory buffer and providing the working information of the circuit load in advance under the condition that the working condition of the circuit load is changed; and the output stage control unit is connected with the master control unit and is used for generating enable signals which respectively correspond to the plurality of slave output stages so as to open and close the plurality of slave output stages according to the working information of the circuit load that is provided in advance, so that the output supply voltage is maintained to be stable. Compared with the prior art, the opening number of the output stages can be controlled in a self-adaptive way according to the working condition of the circuit load, so that the output supply voltage is maintained to be stable, and the performances and the work stability of the circuit load are improved.
Owner:MONTAGE TECHNOLOGY CO LTD
Device and method for graphite electric hot plate temperature control
InactiveCN103412587AExtended service lifeOvercome Point Saturation HazardsTemperatue controlVoltage referenceGraphite
The invention relates to a device and method for graphite electric hot plate temperature control. A master controller module is respectively connected with a temperature collecting module, a temperature control module, a key module, a display module, a warning module and a power module. The power module is further connected with the temperature collecting module, the temperature control module, the key module, the display module and the warning module. The temperature collecting module comprises an anti-interference auxiliary circuit which offers stable supply voltage and reference voltage to a temperature measuring signal adjusting amplifying chip. Two power sources are designed for the power module and the power module offers power to the temperature control module and other modules. On the basis of the PWM technology, the sectional type digital PID algorithm and the integral saturation resistant PID algorithm are adopted so that the temperature control over a graphite electric hot plate can be achieved; a relay is prevented from being frequently turned on and turned off according to the sectional type digital PID algorithm, so that the service life of the relay is prolonged; damage caused by integral saturation is overcome through the integral saturation resistant PID algorithm, so that the temperature control balance time is shortened.
Owner:长沙思强自动化科技有限公司
Semiconductor storage device
InactiveCN1444230AReduce power consumptionNo noiseRead-only memoriesDigital storageAudio power amplifierSemiconductor storage devices
A semiconductor memory device including a memory group divided into a plurality of memory blocks including a first memory block and a second memory block. The first sense amplifier control unit activates the sense amplifier connected to the first memory block in response to the first activation signal. The second sense amplifier control unit activates the sense amplifier connected to the second memory block in response to the second activation signal. The signal control unit outputs the first activation signal and the second activation signal to the first sense amplifier control unit and the second sense amplifier control unit which are separated from each other, and the signal control unit makes the first sense amplifier control unit and the second sense amplifier control unit separate after outputting the first activation signal. The activation signal is delayed by a predetermined time to output the second activation signal to the second sense amplifier control unit.
Owner:FUJITSU LTD
On-load voltage regulation switch special for power distribution transformer
ActiveCN106653426ASimple structural designFrequent Voltage AdjustmentVariable inductancesElectric switchesState of artDistribution transformer
The invention discloses an on-load voltage regulation switch special for a power distribution transformer. The switch comprises a stepping motor, a gearbox, a ball screw, a linear guide rail, a time sequence rack, an insulation support, a connection piece, a bolt type needle bearing, a selective switch assembly and a changeover switch assembly. By the on-load voltage regulation switch, the problem that the on-load voltage regulation switch of the power distribution transformer in the prior art is needed to be periodically maintained during achieving on-load voltage regulation is solved, and the problems of complicated switch and high cost of an on-load tap switch in the prior art are simultaneously solved; by integrated connection of a ball nut of the ball screw, the linear guide and the time sequence rack to drive the selective switch assembly and the changeover switch assembly, the structure is simplified, and the cost is reduced; on the basis that the shape and the volume of the power distribution transformer are not changed, frequent voltage adjustment of the power distribution transformer under a load condition is achieved, the power supply voltage is stabilized, and the loss is reduced; and meanwhile, the lifetime cycle of the on-load voltage regulation switch is equivalent to the lifetime cycle of a transformer body of the power distribution transformer, maintenance is not needed within lifetime period of the on-load voltage regulation switch, and the on-load voltage regulation reliability of the power distribution transformer is improved.
Owner:济南爱迪电气设备有限公司
Semiconductor integrated circuit
InactiveCN1964048ASufficient power supply capacitanceReduce manufacturing costSemiconductor/solid-state device detailsSolid-state devicesEngineeringSemiconductor
A semiconductor integrated circuit having a multilayer wiring structure is provided which includes: a top metal wiring layer (MTOP) including a plurality of top layer power supply wirings and a next-to-top metal wiring layer (MTOP-1) directly below the top metal wiring layer MTOP including a plurality of next-to-top layer power supply wirings. Each of the top layer and the next-to-top layer power supply wirings also includes first potential wirings for supplying a first potential to the circuit elements and second potential wirings for supplying a second potential to the circuit elements. The top layer power supply wirings and the next-to-top layer power supply wirings cross each other and have a top layer insulating film disposed between them. First and second contacts are provided in the insulating film for connecting the first potential wirings and second potential wirings in the top and the next-to-top metal wiring layers with each other.
Owner:KAWASAKI MICROELECTRONICS
Integrated circuit current regulator
InactiveUS20050248390A1Minimize additionDecrease supply voltageVolume/mass flow measurementPower supply for data processingCurrent regulatorIntegrated circuit
An integrated circuit current regulator that compensates for variation in current required based on the switching activity of the integrated circuit. A first embodiment incorporates a voltage controlled on-chip bypass circuit with a scaling unit to divide an input voltage into n fractional voltages and an on-chip voltage monitor to compare a fraction of the on-chip supply voltage with a reference voltage and control a corresponding on-chip power supply bypass. At least one bypass resistor per comparator is switched between the supply voltage and ground potential according to the output signal of the corresponding comparator to dampen power supply noise. The value of the by-pass resistance R increases with decreasing on-chip supply voltage and decreases with increasing supply voltage. A resistance as a function of supply voltage R(Vdd) characteristic is realized to reduce or eliminate mid-frequency power supply noise, caused by on-chip switching activity variations while minimizing additional on-chip power dissipation.
Owner:IBM CORP
Double-layer card-issuing equipment and card-issuing method
ActiveCN106898100ASolve the problem of difficult grippingIncrease memory card capacityConveying record carriersApparatus for meter-controlled dispensingDisplay deviceEngineering
Owner:GUANGZHOU HUABIAO SCIENCEAND TECH DEV CO LTD
Cathode protection data automatic acquisition system based on wireless sensor network
ActiveCN103702400ALarge voltage dynamic rangeImprove efficiencyPower managementNetwork topologiesWireless mesh networkTransceiver
The invention discloses a cathode protection data automatic acquisition system based on a wireless sensor network. The system is based on a radio frequency transceiver CC1110, adopts a time division multiplexing working mode, and mainly comprises a solar power supply module, a power circuit, the radio frequency transceiver CC1110, a down link and an up link, wherein the solar power supply module is connected with a radio frequency single chip processor; the input end of the radio frequency single chip processor is connected with a data acquisition module; the output end of the radio frequency single chip processor is connected with an impedance conversion circuit; the output end and the input end of the impedance conversion circuit are respectively connected with the input end and the output end of the first radio frequency switch; the output end of a first radio frequency switch is connected with the down link; the output end of the down link is connected with a second radio frequency switch; the output end of the second radio frequency switch is connected with a transceiver antenna; the other output end is connected with the up link; the up link is connected with the first radio frequency switch; a switch control output end of the radio frequency single chip processor is connected with the first radio frequency switch and the second radio frequency switch. The automatic acquisition system can implement automatic data acquisition, transmission and timed monitoring.
Owner:PIPECHINA SOUTH CHINA CO
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