113results about How to "Reduce supply voltage" patented technology

The invention discloses a wirelessly charged sensor node. The node mainly comprises a printed circuit board (PCB) antenna, a radio frequency front end module, a microprocessor module, a sensor module and a wireless radio frequency module, wherein the PCB antenna is connected with the radio frequency front end module; the radio frequency front end module is connected with the microprocessor module through a voltage-stabilizing submodule; and the microprocessor module is connected with the sensor module through an input and output (IO) port, and is connected with the wireless radio frequency module through a serial peripheral interface (SPI). The sensor node not only can be wirelessly charged, but also can acquire data of various sensors and send the data out through wireless radio frequency chips.

The invention discloses an air-conditioner air purification system and a control method of the air-conditioner air purification system. The air-conditioner air purification system comprises an air purification module and is provided with an anion concentration detection module and an ozone concentration detection module. A detection signal is output to a single-chip microcomputer control unit by the air-conditioner air purification system and a voltage regulating signal is output by the single-chip microcomputer control unit to a voltage regulating module connected with the air purification module. According to the air-conditioner air purification system and the control method of the air-conditioner air purification system, the anion concentration detection module and the ozone concentration detection module are arranged so that corresponding concentration in a room can be detected in real time and compared with a set target value, the voltage regulating module can be controlled by a controller according to a comparison result, a supply voltage of the air purification module can be regulated, closed-loop control can be achieved, accurate control over the anion concentration and the ozone concentration in the room can be achieved, and therefore the anion concentration and the ozone concentration in the room are respectively controlled to be at a high comfort level beneficial for physical and psychological health of people in a closed-loop mode, and the purposes that air in the room is purified and dust is effectively removed are achieved.

The present disclosure provides for a voltage reference circuit for Radio Frequency Identification (RFID) tag circuit. Such a circuit is formed in a substrate that is lightly doped with impurities of a first polarity. A first transistor having a first source connected to a ground, a first gate doped with impurities of the first polarity, and a first drain connected to the first gate at a reference node, a reference current source to provide a reference current to the reference node for generating a first reference voltage at the reference node, and an additional component for receiving the first reference voltage are disclosed.

A tunable multiphase ring oscillator includes a plurality of stages connected in series in a ring structure, where each stage generating a stage output from a stage input. Each stage of the tunable multiphase ring oscillator includes a plurality of trans-conductance cells, each generating an output from at least one portion of the stage input. Each stage further includes at least one phase shifting module for imparting at least one phase shift to the at least one portion of the stage input, an oscillator unit for generating the stage output from a combination of the plurality of outputs, and means for varying at least one of the plurality outputs so as to adjust a phase of the stage output.

The present invention presents a low-power low-noise amplifier utilizing a positive feedback technique and an active transconductance enhancement technique, achieving properties like low power consumption and low noise. Main circuit structures are that: a balanced-unbalanced transformer (1), an amplifier (2) utilizing an active transconductance enhancement and capacitance cross-coupling technique, a main common-gate amplifier stage (3), a positive feedback branch (4) and a resistance load (5). The present invention performs active transconductance enhancement on a common-gate amplifier and uses capacitance cross-coupling technique for the active transconductance enhanced portion, achieving higher equivalent transconductance. A positive feedback branch is introduced, increasing adjustment freedom degree of equivalent transconductance for the common-gate amplifier, reducing constraints between noise and input matching, improving noise property and meanwhile achieving a high gain at lower power consumption. The present invention is simple in structure, small in occupation area and easy to achieve.

The invention discloses a CPU, comprising the following components: a memory for storing data and instructions; a control component for controlling and coordinating the operation of each functional component; and an arithmetic component for finishing various arithmetic and logical operations. The CPU further comprises: a sleep order register for generating sleep trigger signals according to configuration when the CPU is in idle condition; a power supply management module for closing the power supplies of the control component and the arithmetic component according to the sleep trigger signals, and reducing the power supply voltage of the memory till lower than the working voltage. The invention can reduce power consumption in idle condition of CPU device, thereby achieving the purpose of saving power consumption.

The invention discloses a control chip for realizing low-standby power consumption of an AC-DC switch power supply. The control chip includes an output voltage detecting unit, a constant voltage frequency control unit, a standby determination module, a secondary conduction time detecting unit, a constant current frequency control unit, a constant voltage/constant current mode selection unit, a leading edge blanking unit, a peak value current comparison unit, an RS trigger, a driving unit, and a built-in power supply unit. From the aspect of the circuit structure of the switch power supply control chip, the internal circuit structure of the chip can be adjusted under the system standby state, standby signals of the system are generated by the standby determination module and part of unnecessary circuit modules are turned off when the normal standby of the system is maintained, and the work current for chip standby is reduced. Meanwhile, the inner power supply voltage of the chip is reduced under the system standby state, and the standby power consumption of the control chip can be further reduced under the condition that the dynamic performance is not influenced.

Adaptive voltage modulation circuits for adjusting supply voltage to reduce supply voltage droops and minimize power consumption are provided. In one aspect, an adaptive voltage modulation circuit detects a supply voltage droop by detecting when a supply voltage falls below a droop threshold voltage, and adjusts a clock signal provided to a load circuit in response to a supply voltage droop. The adaptive voltage modulation circuit keeps a count of the number of clock signal cycles during which the supply voltage is below the droop threshold voltage. The adaptive voltage modulation circuit increases the supply voltage in response to the count exceeding an upper threshold value, and decreases the supply voltage in response to the count being less than a lower threshold value at an end of a defined period. The adaptive voltage modulation circuit can reduce the time a load circuit operates with reduced frequency while minimizing power consumption.

The invention discloses a current mode reference voltage source based on downward current compensation. The current mode reference voltage source can work under quite low power voltage, and output voltage of the reference voltage source can be changed by adjusting device parameters. The current mode reference voltage source comprises a compensation current generating circuit and a reference voltage generating circuit.

The invention relates to a low voltage and can provide the linearity and input scope transconductance amplifier, its characteristic is that introduced a new local feedback structure in the traditional source level weaken structure. The feedback structure made two low resistivities anti- pitch points in the source level damping resistance two terminal, the low resistivity anti-pitch point reduced the traditional source level weaken structure distortion. The structure overcame the traditional transconductance amplifier defect of litter input scope under the low voltage, the linear inferior and so on, simultaneously the electric circuit most voltage drop on the key way is smaller than the traditional structure circuit, thus brought out the working potential under the low voltage. The circuit characteristic is that suitable for the low voltage work, the high linearity and the big input scope, the structure completely conforms to the present integrated circuit research and development direction.

The invention discloses a drive control circuit, a drive method, a circuit board and an air conditioner. The motor drive control circuit comprises a first power module, a second power module, a firstswitch group, a controller, a totem-pole PFC circuit and a step-down switch circuit, wherein the first power module and the second power module are connected to two sides of an open-winding motor, thecontroller is connected with the totem-pole PFC circuit to control the totem-pole PFC circuit to reach at least one of the following states: a diode rectification state, a low-frequency switching state and a high-frequency switching state; and a diode rectification mode and a low-frequency switching mode of the totem-pole PFC circuit are matched. The controller controls the step-down switch circuit to carry out step-down output, and provides a voltage suitable for low-frequency operation for the first power module, thereby obtaining a higher energy efficiency ratio in a low-frequency operation state of the open-winding motor, the operation efficiency of equipment at a low frequency is improved, and the energy-saving demands are met.

The invention provides a high-dynamic high-power bridge-type piezoceramics driving power with a signal generator, comprising a signal generating unit, a power amplifier module and an MCU unit, wherein, the signal generating unit is connected with the power amplifier module via the MCU unit so as to realize control functions of a keyboard, liquid crystal and the like; power amplifier module output drives a PZT actuator, and the MCU unit is also connected with the keyboard, the liquid crystal and a serial port; the power amplifier module is connected with an analog input unit, the MCU unit and the power amplifier module are respectively connected with a protective circuit, and the signal generating unit, the power amplifier module and the MCU unit are respectively connected with a power supply source unit. The invention can be used in application scopes such as fine spark machining and the like, which have high requirements on movement and power; a signal generating unit can be self-provided by FPGA, signal is amplified by a bridge-type circuit so as to realize functions of high-dynamic high-power output, etc.

The invention discloses a dynamic voltage adjusting system and method. The system comprises a main controller, a power management chip and at least one calculation chip. The calculation chips are usedfor sending calculation error signals to the main controller when it is detected that the error rate of the calculation result exceeds a preset threshold value. The main controller is used for sending a power adjusting command to the power management chip according to the calculation error information and adjusting the power voltages of the calculation chips. Under the fixed frequency, by reducing the voltages, the power consumption of the chips is controlled, and the supply voltages of the chips are reduced to the maximum extent; through hardware detecting, the voltage detection and adjustment time can be greatly shortened, and the power efficiency of the chips and the system is improved.

A method and a system are provided for performing write assist. Write assist circuitry is initialized and voltage collapse is initiated to reduce a column supply voltage provided to a storage cell. A bitline of the storage cell is boosted to a boosted voltage level that is below a low supply voltage provided to the storage cell and data encoded by the bitline is written to the storage cell.

The invention relates to a digital pre-distortion (DPD) based system for optimizing a narrow-band Internet of Things (NBIOT) transmitting front end. The system comprises a coupler, an attenuator, a radio-frequency transceiver, a power amplifier (PA), a storage module and a DSP processor. The coupler performs coupling attenuation on a signal amplified by the PA and then transmits the signal to theattenuator; a signal coupled by the attenuator is attenuated and then is transmitted to the radio-frequency transceiver; the radio-frequency transceiver sends and receives a signal from uplink and downlink channels, and collects a transmission signal of a feedback channel; the storage module is used for storing characteristic amplitude and phase information of the PA demodulated by the feedback channel and comparing data iterated for multiple times for storage; and the DSP processor modifies an NBIOT reference sequence according to the stored amplitude and phase information and then outputs the NBIOT reference sequence to the radio-frequency transceiver. The DPD based system for optimizing the NBIOT transmitting front end can implement the optimization on the cost and power consumption ofthe NBIOT transmitting front end. The invention further relates to a DPD based method for optimizing the NBIOT transmitting front end.

The invention discloses an electric energy transfer method and an electric energy bus. A plurality of power supply devices and power receiving devices are respectively connected with the electric energy bus through a unified control switch, thereby achieving the controllable conversion of electric energy between the power supply devices and the power receiving devices.

The invention provides a method for controlling release of volatile compounds in an electric heating smoking system. Constant current is supplied for at least one heating element as detection current,and voltage values at both ends of the heating element under the detection current are measured; the measured voltage values are compared to a preset voltage threshold and are adjusted by the electrical energy supplied by the heating element so that the voltage value of the heating element at the detected current remains below the predetermined voltage threshold. The above control method does notinvolve the detection and conversion of the temperature during the whole process, but only detects the voltage value under the constant current, adjusts the electric energy output to the heating element correspondingly, keeps the voltage value at the threshold value, achieves good control of the working state of the electric heating smoking system, simplifies the temperature evaluation of a controller with limited computing resources, reduces the measurement and calculation of a current factor, improves the hardware structure and improves the accuracy of results.

The invention discloses a voltage reference source and a reference voltage output method. The voltage reference source comprises a voltage reference source and a current reference source, a bias current generation module and a reference voltage generation module, the bias current generation module is used for outputting bias current; the reference voltage generation module is used for generating apositive temperature coefficient voltage and a negative temperature coefficient voltage based on the bias current; reference voltage is output based on superposition of the positive temperature coefficient voltage and the negative temperature coefficient voltage; according to the voltage reference source, the current flowing through the positive temperature coefficient voltage generation circuitis adjusted through the trimming circuit so as to adjust the temperature coefficient of the reference voltage, so that the temperature coefficient of the reference voltage is close to zero, and the voltage reference source can realize low power supply voltage and ultra-low power consumption.

The invention discloses a low-noise amplifier and a radio frequency terminal. The low-noise amplifier comprises a first NMOS transistor, wherein the gate is directly or indirectly coupled with the input end of the low-noise amplifier, and the source is directly or indirectly grounded; a first PMOS transistor, wherein the source is coupled with a power supply, the gate is coupled with the drain of the first NMOS transistor, the drain is coupled with the drain of the first NMOS transistor through a first inductor, and the drain is directly or indirectly coupled with the output end of the low-noise amplifier; a first capacitor, wherein the first end is coupled with the drain of the first NMOS transistor, and the second end is coupled with the gate of the first PMOS transistor; and a second inductor, wherein the first end is coupled with the gate of the first PMOS transistor, and the second end is grounded. According to the scheme of the low-noise amplifier and the radio frequency terminal, the linear relationship between the output and input of the low-noise amplifier can be improved, the low-voltage application is facilitated; moreover, the stage matching characteristic can be improved; and the noise performance is relatively high.

The invention relates to a method for generating three-phase sine waves, comprising an angle generation step and a phase voltage waveform data generation step. In the method, the range of a phase angle theta in a certain sampling period is judged according to the value of the phase angle theta, data conversion processing is carried out, the duty ratio data u of phase voltage in the sampling period are obtained and transmitted to a PWM generator, and the PWM generator sends out a pulse control signal for controlling the operation of a switching component, so that a phase voltage waveform of a certain phase is output, and a three-phase phase voltage waveform vector with the phase angle phase difference of 120 degrees is synthesized to obtain a three-phase line voltage sine wave; and when the maximum value of phase voltage is U, the maximum value of line voltage is 2U, and the obtained three-phase line voltage is sequentially symmetrical. Compared with a traditional mode that the line voltage is 2 times of the phase voltage when the three-phase phase voltage is a sine wave, the voltage utilization rate of a switching component in a power unit is enhanced, so that the purpose of lowering the power supply voltage of the power unit is realized.

The invention provides an electric-heating smoking system. The electric-heating smoking system comprises a detection module, an electric energy adjustment module and a control module. The detection module is used for measuring the working state of a heating element; the electric energy adjustment module is used for adjusting electric energy output from a power supply to the heating element; the control module is used for controlling the detection module to measure the working state of the heating element, and controlling the electric energy adjustment module to adjust the electric energy output from the power supply to the heating element according to the measured working state; the detection module and the electric energy adjustment module are configured to alternately operate at a certain frequency. The electric-heating smoking system has the advantages that the working state of the heating element is acquired in real time, the electric energy supplied for the heating element is adjusted correspondingly, the acquisition process and the electric energy supply process are time-multiplexed, and the hardware modules for detecting and adjusting electric energy supply are alternately operated at a certain frequency, so that the hardware structure is greatly simplified, and mutual interference is eliminated and reduced.

The invention discloses an ultra-low power consumption wireless geomagnetic type vehicle detector and a control method thereof. In order to prevent the unnecessary electric energy consumption during the conveying process and the storage process of the wireless geomagnetic type vehicle detector, a mercury switch is serially connected between a battery and a circuit board, and when the wireless geomagnetic type vehicle detector is not in use, the wireless geomagnetic type vehicle detector can be arranged in an inverted manner, and therefore the power off can be realized, and the zero power consumption effect can be realized. An LDO-0 circuit is additionally provided, and power supply voltage of a wireless communication module, power supply voltage of a MCU processing unit, and power supply voltage of a magnetic acquisition module are reduced, and then the working current of the whole wireless geomagnetic type vehicle detector can be reduced. During the working of the wireless geomagnetic type vehicle detector, only the MCU processing unit and the wireless communication module are required to work continuously, and the magnetic acquisition module is not required to work constantly, and therefore the LDO-0 circuit is additionally provided, and then the MCU processing unit is used to control the interruptible power supply of the magnetic acquisition module, and the power can be supplied before the magnetic field acquisition, and the power can be cut off after the completion of the magnetic field acquisition.