103results 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.

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.

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 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.

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 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 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.

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.

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 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.