104results about How to "Reduce standby current" patented technology

A temperature detector sets the level of a temperature detecting signal to a level indicating a high temperature state, detecting that the chip temperature is higher than a first boundary temperature. The temperature detector sets the level of thereof to a level indicating a low temperature state, detecting that the chip temperature is lower than a second boundary temperature. A control circuit changes its operating state according to the level of the temperature detecting signal. This prevents the operating state of the control circuit from frequently switched even when the chip temperature fluctuates around the boundary temperatures, and accordingly reduces current consumption of the control circuit due to the switching operation. Further, the first and second boundary temperatures set a buffer zone, so that the temperature detector does not detect power supply noises as temperature variation. This can prevent malfunction of the temperature detector and the semiconductor integrated circuit.

A boost voltage generator generates a boost voltage as a high-level voltage of word lines. First word decoders output a low-level voltage or the high-level voltage according to a first address signal in an active period, and outputs the high-level voltage in a standby period. A switch circuit connects a high-level voltage line for supplying the high-level voltage to the first word decoders, with a boost voltage line in the active period, and connects the same with an internal voltage line in the standby period. The internal voltage line is supplied with a voltage lower than the boost voltage. Word drivers supply the boost voltage to the word lines when the gates of their transistors receive the low-level voltage from the first word decoders, and output the low-level voltage to the word lines when the gates thereof receive the high-level voltage from the first word decoders.

The invention relates to a startup and shutdown circuit which comprises a startup key, a startup delay circuit, a startup buffer circuit, a startup and shutdown enabling circuit, a power circuit, a startup level locking circuit, a shutdown detection circuit and a singlechip control circuit, wherein the startup key, the startup delay circuit, the startup buffer circuit and the startup and shutdown enabling circuit are sequentially connected; the startup and shutdown enabling circuit is connected with the power circuit; the power circuit, the startup level locking circuit and the startup delay circuit are sequentially connected; the power circuit is further connected with the startup buffer circuit; and the shutdown detection circuit, the singlechip control circuit and the startup and shutdown enabling circuit are sequentially connected. The startup and shutdown circuit is applicable to a multi-parameter monitor, improves the system stability through hardware startup and software shutdown, has the advantages of simplicity, stability, low standby current, low energy consumption, flexible design and the like, and greatly improves a use effect of a user.

A boost voltage generator generates a boost voltage as a high-level voltage of word lines. First word decoders output a low-level voltage or the high-level voltage according to a first address signal in an active period, and outputs the high-level voltage in a standby period. A switch circuit connects a high-level voltage line for supplying the high-level voltage to the first word decoders, with a boost voltage line in the active period, and connects the same with an internal voltage line in the standby period. The internal voltage line is supplied with a voltage lower than the boost voltage. Word drivers supply the boost voltage to the word lines when the gates of their transistors receive the low-level voltage from the first word decoders, and output the low-level voltage to the word lines when the gates thereof receive the high-level voltage from the first word decoders.

The invention provides a charge pump circuit and a memory. The charge pump circuit comprises a charge pump unit, a clock oscillator, a first partial voltage unit and a voltage comparer and further comprises a second partial voltage unit. The output end of the charge pump unit is connected with the output end of the charge pump circuit. The clock oscillator is suitable for providing a drive clock signal for the charge pump unit. The first input end of the first partial voltage unit is connected with the output end of the charge pump unit, the second input end of the first partial voltage unit is grounded, and the first partial voltage unit is suitable for outputting a first partial voltage. A reference voltage and the first partial voltage are input into the first input end and the second input end of the voltage comparer respectively, the voltage comparer is suitable for outputting a first comparison result which is used for controlling the clock oscillator to output the drive clock signal. The first input end of the second partial voltage unit is connected with a power source, the second input end of the second partial voltage unit is grounded, and the second partial voltage unit is suitable for dividing a power voltage so that the reference voltage can be output. The charge pump circuit has a low quiescent current, and the standby power consumption of the memory can be reduced.

A boost voltage generator generates a boost voltage as a high-level voltage of word lines. First word decoders output a low-level voltage or the high-level voltage according to a first address signal in an active period, and outputs the high-level voltage in a standby period. A switch circuit connects a high-level voltage line for supplying the high-level voltage to the first word decoders, with a boost voltage line in the active period, and connects the same with an internal voltage line in the standby period. The internal voltage line is supplied with a voltage lower than the boost voltage. Word drivers supply the boost voltage to the word lines when the gates of their transistors receive the low-level voltage from the first word decoders, and output the low-level voltage to the word lines when the gates thereof receive the high-level voltage from the first word decoders.

The invention discloses a method and a device for reducing power consumption of a terminal. The method includes: when a user needs to interact with a network, an RRC (radio resource control) link between the terminal and the network is established by sending an RRC link establishment request to the network; after the RRC link is established, the terminal monitors data traffic of the RRC link; if no data traffic is monitored on the RRC link within a preset time, an RRC link release indication message is sent to a network side; and the network side releases the RRC link according to the RRC link release indication message so as to enable the terminal to enter a low-power-consumption state. By the method and the device, overall power consumption of the terminal can be reduced, and stand-by time of the terminal is prolonged.

The invention relates to a dynamic switching device and method for a mobile terminal data mode. The device comprises a terminal state monitoring module for monitoring the state of a mobile terminal, a data transmission monitoring module for monitoring whether data are transmitted, a data transmitting module, an input monitoring module for monitoring an input action, an input module, a switching controlling module for switching and controlling the data mode and a baseband communicating module. The method comprises the steps of: in set time, judging whether the mobile terminal is in an idle state; in the set time, judging whether data transmission exists in the mobile terminal; and switching the data mode of the mobile terminal to a 2G data mode. With the dynamic switching device and methodfor the mobile terminal data mode, provided by the invention, when the mobile terminal is in the idle state in the set time and no data are transmitted, the data mode is automatically switched into the 2G data mode, thus the standby current of the mobile terminal in the data accessing state is reduced and the use time is prolonged.

The invention discloses an alternating current / direct current charging control guiding circuit of an electric vehicle conduction charging system and a control method of the circuit. The alternating current / direct current charging control guiding circuit includes four parts including a power source waking and self-locking circuit, a CC / CC2 resistance detection circuit, a CP signal processing circuit and a microcontroller. The alternating current / direct current charging control guiding circuit has the advantages that the stand-by power consumption is low, delayed power failure can be achieved, an alternating current / direct current charging control guidance mode and a normal vehicle running guidance mode are both compatible, there are no mechanical contact points, and the service life is long. The provided alternating current / direct current charging control guiding circuit of the conduction charging system is usually integrated in a battery management system or a vehicle control unit. Switch devices adopted in the design are all MOS components, mechanical losses are avoided, the service life of a switch is prolonged, and the reliability of the alternating current / direct current charging control guiding circuit is improved.

Each of embodiments of the invention generally relates to a data communication method, a data communication device and a multimode communication terminal. Particularly, the invention provides the data communication method comprising detecting available Wi-Fi signal intensity in an area where the terminal is arranged; determining the data communication mode of the terminal based on the detected available Wi-Fi signal intensity; and performing data communication based on the determined data communication mode. A power-saving data communication mode combining a honeycomb mode and a Wi-Fi mode is provided for the multimode communication terminal, so stand-by current of the multimode communication terminal is remarkably reduced without influence on user experience, stand-by power consumption of the honeycomb communication is saved, and stand-by time of the multimode communication terminal is extended.

Disclosed is a word line driving circuit which includes a first MOS transistor and a second MOS transistor having mutually different conductivity types and a third MOS transistor of a conductivity type which is the same as that of the first MOS transistor. Gates of the first and second MOS transistors are connected in common for receiving an input signal. Sources of the first and second MOS transistors are connected to a first power supply and a second power supply, respectively. The third MOS transistor is connected between a drain of the first MOS transistor and a drain of the second MOS transistor. A connection node between the drain of the second MOS transistor and a drain of the third MOS transistor is connected to a word line. When the input signal is set to a high level and when the second transistor is turned on, a potential lower than a high level of the input signal is supplied to a gate of the third MOS transistor. A signal with a high level thereof being lower than a high level of the input signal, or a fixed GND potential is supplied to the gate of the third MOS transistor.

The invention provides a decoding method of a power supply line of a memory array, which is a method for selectively supplying voltage supply in an integrated circuit memory device. In the method, an integrated circuit device is provided and comprises multiple first memory units; each memory unit comprises a power supply terminal and a grounding terminal; multiple second memory unit are selected from the multiple first memory units; a first power supply voltage is supplied to the power supply terminal of each memory unit selected, and a second power supply voltage is supplied to the power supply terminal of each unselected memory unit; and the second power supply voltage is lower than the first power supply voltage. In an embodiment of the method, a first grounding voltage is applied to the grounding terminal of each selected memory unit, a second grounding voltage is applied to the grounding terminal of each unselected memory unit, and the second grounding voltage is higher than the first grounding voltage.

The invention discloses an off-state power supply circuit for a two-wire system electronic switch. The off-state power supply circuit comprises a separate excitation switching power supply and a self-closing type starting circuit, wherein the separate excitation switching power supply comprises a transformer T2, a first switching tube, a switching tube control circuit controlling the first switching tube, and an output voltage detection circuit detecting the output voltage of the transformer T2; the transformer T2 comprises a primary winding and a secondary winding; the self-closing type starting circuit comprises a second switching tube and a voltage stabilizer tube Z1. The off-state power supply circuit is simple and reasonable in design, good in using effect, and stable in working performance. The invention further discloses an intelligent switch. The intelligent switch comprises a mechanical switch, a remote controller and a remote control module, wherein the remote control module comprises an electronic switch, an on-off state detection circuit, an on-off control circuit, a wireless communication module, the off-state power supply circuit of the two-wire system electronic switch and an on-state power supply circuit; the intelligent switch is additionally provided with the remote control function while retaining the operation manner of the mechanical switch.

The invention discloses a high-voltage electrified body temperature monitoring system based on a wireless transmission mode, belonging to the field of remote monitoring system. The high-voltage electrified body temperature monitoring system comprises a monitoring center, a transport network and a site plant; a monitoring device is directly installed on the monitoring point of detected high-voltage equipment and is equipotential to the detected equipment; the monitoring device and a data concentrator are communicated in the wireless mode, and the data concentrator is connected with the monitoring center via a wired transport network / GPRS; the monitoring device adopts the design of lower energy consumption, and standby current is smaller than 2 mu A; batteries are adopted to supply power to the monitoring device; and the monitoring device adopts a wireless mode to send data, thus thoroughly solving the problem of high-voltage insulation, and realizing on-line monitoring of the high voltage equipment. The high-voltage electrified body temperature monitoring system gives an alarm in various modes, can find temperature rise of the high voltage equipment in time so as to take measures immediately, thus avoiding accidents and greatly improving the safety of power grid operation.

The invention provides a technical scheme of an operation and maintenance management system for a substation. The operation and maintenance management system comprises an information acquisition device, wherein the information acquisition device is used for default phase and power loss detection and is connected with an information collection device, the information collection device is connected with a controller, the controller is connected with an interface module and a wireless communication module, a camera for image information in a monitoring substation is connected with the controller, the controller is connected with an alarm by an alarm control circuit and is connected with a mains supply through a power supply module, a power supply protection module is further arranged between the mains supply and the power supply module, and the power supply module is connected with a storage battery. With the system provided by the invention, the operation and maintenance condition of the substation can be timely transferred to an upper computer or a control platform, the system has an alarm function, and an alarm can be timely given out; and the system is also provided with the power supply protection module, and thus, the normal running of the whole system can be ensured.

The invention relates to a power supply control circuit of a computer system and a control method. The computer system is provided with the power supply control circuit of an embedded type controller; and the power supply control circuit comprises a voltage stabilizer, a detection control circuit and the embedded type controller, wherein the voltage stabilizer receives a first voltage and can be used for converting the first voltage into a working voltage of the embedded type controller when the voltage stabilizer is enabled; the detection control circuit is used for receiving the first voltage and judging a key signal, disabling the voltage stabilizer when the key signal is not subjected to an action, and continuing to enable the voltage stabilizer when the key signal is subjected to an action; the embedded type controller is connected to the voltage stabilizer and used for receiving the working voltage and outputting a plurality of power supply control signals; and the embedded type controller can also provide a power starting signal to the detection control circuit so as to ensure that the detection control circuit continuously enables the voltage stabilizer.

An object of the present invention is to provide a DC test apparatus capable of reducing wasteful standby power consumption. The DC test apparatus has a power amplifier circuit 130 for supplying a current to a DUT during a test. The power amplifier circuit 130 is provided with transistors 18 and 20 for generating an output current appropriate for an input voltage during current supply, resistors 54 and 56, and a variable resistance circuit 40 for setting a standby current flowing through these transistors 18 and 20 and the like during current supply to a smaller value at any time other than during current supply.

The invention discloses an air mouse low in power consumption. The air mouse comprises a data collecting unit, a wireless emission unit and a control unit. In a working state, the data collecting unit collects spatial gesture data of the air mouse in real time and transmits the data to the control unit. The control unit receives the spatial gesture data from the data collecting unit in real time ad converts the data into corresponding cursor moving information, and the cursor moving information is emitted through the wireless emission unit. Meanwhile, the control unit compares the spatial gesture data which are received in real time with a preset threshold value, and if within preset time period, all the spatial gesture data received by the control unit are smaller than the preset threshold value, the control unit controls the data collecting unit and the wireless emission unit to be disconnected from a power source, and the control unit enters a dormant state from the working state. Standby currents of the air mouse can be greatly reduced, and using time of batteries is prolonged.

The invention relates to an apparatus and a method for monitoring the awakening based on battery connection of a vehicle. The awakening monitoring apparatus is characterized in that when awakening based on resetting generated by a microcomputer of the vehicle occurs, it can be learnt whether the awakening is generated by the resetting based on an initial power source of the vehicle battery. According to the invention, the awakening apparatus has the effects of reducing standby electric current and saving power, i.e., when an accessory power source is closed, standby electric current consumption can be prevented such that the standby electric current can be usefully used to cut a multimedia H / U microcomputer circuit of the power source.

The present invention discloses an organic light-emitting display unit used in a mobile telephone, which comprises a boost module, an OLED driving module, an OLED display screen and a control module, wherein said control module is used for receiving battery voltage, inputting battery voltage to the boost module when OLED enable signal is put high and shutting off battery voltage input to the boost module when OLED enable signal is put low. The present invention further discloses a method used for lowering power consumption of a mobile telephone and comprising the follwong steps: judging states of the OLED enable singal, inputting battery voltage to the boost module when the OLED enable signal is put high and shutting off battery voltage input to the boost module when the OLED enable signal is put low. The present invention resolves the problem that part current consumption still exists in the OLED driving module when a mobile telephone is kept in standby or shutdown condition, reduces current in a mobile telephone in standby condition, and improves work time of a mobile telephone.

The invention discloses a method and system for starting sleep and wakeup modes. The method comprises the following steps that a communication terminal judges to start a work state or finish the work state; the communication terminal transmits a wakeup control signal to a GPRS (general packet radio service) module through a control pin if needing to start the work state, and the GPRS module generates interruption, starts a wakeup mode and forbids the control pin generating the interruption when detecting the wakeup control signal; the communication terminal transmits a sleep control signal to the GPRS module if finishing the work state; and the GPRS module starts the sleep mode and allows the control pin to generate the interruption after receiving the sleep control signal. Through the method for starting the sleep and wakeup modes, disclosed by the invention, the standby current of the GPRS module is reduced, and the great amount of consumed electric energy is avoided; and meanwhile, the heat of the GPRS module is relatively reduced when the standby current is reduced so that the service life of the GPRS module is prolonged.

Disclosed is an electricity-saving device and a method for the camera of a multimedia mobile phone; the electricity-saving device is characterized in that the main board of the mobile phone includes a baseband and a low-dropout linear regulator; the fourth output end of the baseband is connected with the turn-off pin of the internal power supply of the camera; the second output end of the baseband is connected with the digital voltage pin of the camera; the fifth output end of the baseband is connected with the input end of the low-dropout linear regulator; the first output end of the low-dropout linear regulator is connected with the analog voltage pin of the camera; the second output end of the low-dropout linear regulator is connected with the digital I / O port voltage pin of the camera. The electricity-saving method is realized through the software. The electricity-saving device and the method can enable the current consumption of the camera of the multimedia mobile phone to be about 20 uA.

The invention discloses an energy-saving and reliable AC electric welding machine. The machine comprises an AC power supply, a first switch, a second switch, a first fuse, a second fuse, a first relay, a second relay, a first capacitor, a second capacitor, a third capacitor, a normally-opened contact switch of the first relay, a normally-closed contact switch of the second relay, a transformer, a welding handle, a first diode, a second diode, a third diode, first to seventh resistors, first to fourth voltage-stabilized diodes, a potentiometer, an one-way thyristor and an unijunction transistor; the first relay is powered off, the first capacitor is connected to a loop of the transformer, and the electric welding machine enters an idle load energy saving state under the current limiting effect of the first capacitor; when a welding part is in contact with the welding handle and after 5 seconds that the electric welding machine is stopped from normal work, the electric welding machine enters the idle load state. With the adoption of the machine, the standby current of a primary coil of the transformer can be automatically reduced when welding is not carried out, and thus the energy consumption of the electric welding machine can be reduced; the electric welding machine has the characteristics of being simple in structure, and reliable in performance during working.

An embodiment of the invention provides a charging method, a terminal and a charger and relates to the technical field of communication. A charging process of a battery of the terminal can be controlled through interaction of the terminal and the charger, so that the terminal can be in a dormant state after the battery is fully charged. The method comprises steps as follows: when the terminal and the charger are connected, the charger outputs current to the terminal; the terminal is charged by receiving the current output by the charger; when charge voltage of the battery of the terminal reaches charge cut-off voltage, the terminal transmits a charge completion command to the charger; the charger receives the charge completion command; the charger responds to the charge completion command and stops outputting current to the terminal, so that charging for the terminal is stopped. The technical scheme provided by the embodiment of the invention is applicable to the charging process of the battery of the terminal.

The invention provides a control system which reduces standby current in a vehicle having a passive function of performing authentication in advance and can enable a user to control a device that serves as a control object without uncoordinated feeling. The control system (100) has a control device (10) carried on the vehicle (1) and a carrier (20) capable of performing wireless communication with the control device, the control device enables a specified phenomenon of determining the position of the vehicle to occur according to an instruction signal sent by the carrier and starts to send a response request signal, and the response request signal requests for sending back identification information of the carrier.

The dual-mode terminal comprises a first network system module, a second network system module, a random access memory (RAM). Said RAM allows the first network system module and the second network system module to make read / write operation. The invention also reveals a method thereof comprises: the module at sending side writes the data to be sent-out into RAM, and sends a notice the module at receiving side to receive data; after the module at receiving side receives the notice for receiving the data, it reads out data from RAM.

The invention provides a motor having a circuit for decreasing standby current. The circuit (13) for decreasing standby current is arranged in a control circuit (5) of a drive inverter circuit (4) and a current supply path between control power supplies providing current to the control circuit (5). When driving of a motor body (2) is stopped, the current supply path is cut off via the circuit (13) for decreasing standby current. The circuit (13) for decreasing standby current, the inverter circuit (4), the control circuit (5) and the motor body (2) is arranged in a motor (1).

The method comprises: by not opening the master control mode RF and protocol stack, the mobile terminal is let directly enter into a slave control mode single standby state; when the mobile terminal is at running state, by closing the master control mode RF and protocol stack, the mobile terminal is let be switched from a dual standby state into a slave control mode single standby state. The invention is used to satisfy the needs of realizing a slave control mode standby when having on TD-SCDMA network or TD-SCDMA network is unstable.

The invention relates to the field of terminal control, and discloses a terminal control method and a terminal. The terminal control method comprises the steps of monitoring the specific absorption rate of the terminal through a monitoring assembly, and judging whether the specific absorption rate exceeds a target preset interval or not; if the specific absorption rate exceeds the target preset interval, awakening an application processor layer of the terminal, and reducing the specific absorption rate of the terminal through the application processor layer; wherein the power of the monitoring component is smaller than that of the application processor layer. Compared with the prior art, the terminal control method and the terminal provided by the embodiment of the invention have the advantages that the specific absorption rate of the terminal does not exceed the standard, the service life of the battery is prolonged, and the service life of the battery is prolonged.

The invention provides a switching type voltage stabilizer control circuit and a method for stably outputting electric signals. The switching type voltage stabilizer control circuit comprises a switching type voltage stabilizer and a clock control unit; the switching type voltage stabilizer regulates the output voltage according to reference voltage and feedback voltage; the clock control unit is coupled with the switching type voltage stabilizer, and the clock control unit comprises an oscillator and a pulse shielding modulator; the oscillator is for providing an oscillating signal; the pulse shielding modulator is for generating a control signal for shielding a part of the oscillating signal; and the clock control unit is for providing a control signal for maintaining the output electric signal of the switching type voltage stabilizer in a sleep mode to be within a predetermined section.