247 results about "Transistor switch" patented technology

The invention discloses an electronic component quality control method and system, and relates to the technical field of transistor performance quality control. The quality control method for the electronic component comprises the following steps: evaluating transistor switch abnormity; switching speed delay regulation and control; and evaluating the input signal response control accuracy. Transistor switching abnormality evaluation is carried out in the transistor switching process, then whether switching speed delay optimization is carried out or not is judged based on a quantization result, if switching speed delay optimization is carried out, switching speed delay regulation and control are carried out, and if switching speed delay optimization is not carried out, input signal response control accuracy evaluation is carried out. And finally, judging whether to carry out input signal response control optimization or not based on a quantification result of the input signal response control accuracy evaluation, thereby achieving the effect of improving the response control sufficiency of the transistor on the input signal in the switching process. The problem that the switch response difference is not fully considered in the response control process of a transistor to an input signal in the prior art is solved.

The present invention provides a control circuit of an isolated power supply and an isolated power supply. A secondary side controller in the control circuit can turn on and off a synchronous rectifier based on a voltage from a secondary side winding, enabling adaptive turn-on and turn-off control of the synchronous rectifier. Specifically, when the voltage from the secondary side winding reaches a second predetermined voltage, an instruction for turning off the synchronous rectifier is provided. The second predetermined voltage is adjusted based on a comparison between a time interval for the previous switching period and a predetermined reference interval. In this way, a delay from a turn-off time of the synchronous rectifier to a turn-on time of a primary transistor switch is substantially maintained at the predetermined reference interval. This prevents cross-conduction of the primary and secondary side circuits, ensuring safe operation of the isolated power supply.

The invention discloses a power load switch driving circuit of an electric energy meter. The power load switch driving circuit comprises a step-down rectifying circuit, a voltage stabilizing circuit, an energy storage circuit, an MOS tube switching circuit and a booster circuit, one end of the step-down rectifying circuit is connected with the mains supply, the other end of the step-down rectifying circuit is electrically connected with the voltage stabilizing circuit, the output end of the voltage stabilizing circuit is electrically connected with the MOS tube switching circuit, the energy storage circuit and the output control circuit, and the MOS tube switching circuit is electrically connected with the booster circuit. The invention further discloses an electric energy meter power load switch driving method. The technical problems that an existing driving circuit cannot perform reliable action of a load switch and is complex in structure are solved.

The invention discloses an ultra-wideband circulator based on a periodic modulation topology circuit, and belongs to the technical field of microwave and radio frequency nonreciprocal circuits. The working bandwidth range of the circulator is widened, and non-reciprocal transmission is achieved through non-magnetic materials. A time sequence control unit is respectively connected with a Floquet topology circuit layer, a clock signal driving module, a reset signal driving module and a start signal driving module; the Floquet topology circuit layer is respectively connected with a first coupling port, a second coupling port and a third coupling port; the other ends of the first coupling port, the second coupling port, the third coupling port, the clock signal driving module, the reset signal driving module and the starting signal driving module are respectively grounded; the Floquet topology circuit layer adopts a six-layer parallel network structure, and each layer of network structure comprises a coupling capacitor and three N-type MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) switches. The advantages of the switched capacitor structure are utilized, and the signal processing capacity which is high in integration level, small in size and capable of breaking through delay-bandwidth limitation is achieved.

The invention provides an aerosol generating device and a control method thereof. The aerosol generating device comprises a power supply circuit; the DC / AC inverter comprises an E-type power amplifier, and the E-type power amplifier comprises a transistor switch and an LC load network formed by a capacitor and an inductor; an inductor inductively coupled to the susceptor, thereby heating the aerosol-forming substrate to generate an aerosol; a controller configured to, in operation, determine an apparent ohmic resistance based on the DC supply voltage and a DC current output to the DC / AC inverter by the power supply circuit; the controller is further configured to monitor a change in the apparent ohmic resistance and adjust a frequency and a duty cycle of a switching signal supplied to the transistor switch when the apparent ohmic resistance changes. According to the aerosol generating device and the control method thereof, the frequency and the duty ratio of the switching signal supplied to the transistor switch are adjusted by monitoring the change of the apparent ohmic resistance and when the apparent ohmic resistance changes; therefore, the E-type power amplifier always works in the optimal state.

A control circuit and method for an isolated switching-mode converter are disclosed. In the control circuit, in preparation for turning on a primary transistor switch in a primary-side circuit, preferably, a secondary-side controller transmits an inquiry signal to a primary-side controller, and the primary-side controller transmits, after confirming that it has been prepared, a feedback signal to the secondary-side controller to allow the secondary-side controller to confirm that the primary transistor switch has been turned off. After that, the primary-side controller turns on the primary transistor. In other words, in the control circuit and method of the present invention, in preparation for turning on the primary transistor switch, information exchange is conducted between the primary and secondary sides to make sure that the primary transistor switch is turned on after the synchronous rectifier transistor is turned off.

An electronic device includes a semiconductor substrate and a bidirectional transistor switch formed on the substrate, the bidirectional switch including a first source node, a second source node and a common drain node. A first transistor is formed on the substrate and includes a first source terminal, a first drain terminal and a first gate terminal, wherein the first source terminal is connected to the substrate, the first drain terminal is connected to the first source node and the first gate terminal is connected to the second source node. A second transistor is formed on the substrate and includes a second source terminal, a second drain terminal and a second gate terminal, wherein the second source terminal is connected to the substrate, the second drain terminal is connected to the second source node and the second gate terminal is connected to the first source node.

A pixel driving circuit, a driving method thereof, and a display panel are proposed. The pixel driving circuit includes a switching transistor connected between a gate of the driving transistor and the initialization voltage node and between the first electrode of the driving transistor. The active layer of the switching transistor includes an oxide semiconductor with a characteristics of low leakage current. The display quality is improved when the display panel is operated in the low-frequency driving mode for display.

Power amplifiers with supply capacitor switching are provided herein. In certain embodiments, a power amplifier system includes a power amplifier that provides amplification to a radio frequency (RF) signal, a power management circuit that controls a voltage level of a supply voltage of the power amplifier, a supply capacitor having a first end connected to the supply voltage, and a bulk n-type field-effect transistor (NFET) switch. The power management circuit is operable in multiple supply control modes (for example, an average power tracking mode and an envelope tracking mode). Additionally, the bulk NFET switch is controlled based on the supply control mode of the power management circuit. The bulk NFET switch includes a ground NFET in series with a second end of the supply capacitor and a ground voltage, and a discharge NFET connected between the second end of the supply capacitor and the supply voltage.

A system for prognosis and control of a power module includes a gate driver circuit and a controller circuit. The gate driver circuit drives a target gate node of a target power transistor in response to a pulse width modulation signal, measures a target gate voltage, switches a desaturation signal in response to the target power transistor switching between an off state and an on state, measures a target transistor voltage, and measures a target transistor current. The controller circuit modulates the pulse width modulation signal to increase the target gate voltage, determines a target threshold voltage as the target gate voltage in response to the desaturation signal switching states, determines a target on-resistance based on the target transistor voltage and the target transistor current, and controls the target power transistor based on the target threshold voltage and the target on-resistance.

The present disclosure relates to a device and method for monitoring a power supply unit of a device that supplies power by a battery. A power monitoring device according to the present disclosure includes a current sensor unit including a shunt resistor and an operational (OP) amplifier or a smart field effect transistor (FET) switch including a current sensor and a temperature sensor. Thus, since a capacitor for preventing a short circuit between a thermal fuse and a power supply unit according to the related art can be removed, a ground circuit can be integrated, and a power monitoring circuit can be simplified.

The invention relates to a trigger unit. The trigger unit comprises a first comparison feedback circuit, a first clock gating circuit, a master latch and a slave latch assembly, the first comparison feedback circuit is used for detecting a signal hopping state of an external input signal according to a first output signal output by the output end of the main latch, and generating a corresponding first state feedback signal, so that the first clock gating circuit generates a corresponding first gating clock signal according to the first state feedback signal and a reference clock signal, and sends the first gating clock signal to the second clock gating circuit; under the condition that the first gating clock signal is valid, the main latch is controlled to update the first output signal according to the external input signal; the state switching opportunity of the main latch can be accurately controlled, and unnecessary clock flipping in the trigger and transistor switching activity caused by the unnecessary clock flipping are effectively reduced, so that dynamic power consumption related to a clock network and dynamic power consumption generated by flipping of nodes in a data path are effectively reduced.

The invention provides a control system and a control method of an energy storage battery, a computer readable storage medium and energy storage equipment, and the control system comprises a first metal oxide semiconductor field effect transistor MOS switch which is connected with a charging and discharging circuit of the energy storage battery and is used for controlling the on or off of the charging and discharging circuit; the controllable switch is used for controlling on or off of the charging and discharging circuit, and the controllable switch and the first MOS tube switch are connected in series to the charging and discharging circuit; the control module is connected with the energy storage battery, the controllable switch and the first MOS tube switch, and the control module is used for monitoring whether the energy storage battery breaks down or not; and in response to monitoring that the energy storage battery has a fault, controlling the first MOS tube switch and / or the controllable switch to be switched off so as to switch off the charging and discharging circuit. When the energy storage battery breaks down, the MOS tube switch and the controllable switch can jointly control the charging and discharging circuit to be switched off, so that redundancy protection is achieved, and the safety of the energy storage battery is improved.

A common gate resistor bypass arrangement for a stacked arrangement of FET switches, the arrangement including a series combination of an nMOS transistor and a pMOS transistor connected across a common gate resistor. During at least a transition portion of the transition state of the stacked arrangement of FET switches, the nMOS transistor and the pMOS transistor are both in an ON state and bypass the common gate resistor. On the other hand, during at least a steady state portion of the ON steady state and the OFF steady state of the stacked arrangement of FET switches, one of the nMOS transistor and the pMOS transistor is in an OFF state and the other of the nMOS transistor and the pMOS transistor is in an ON state, thus not bypassing the common gate resistor.

Prediction and control of power modules of an electrical load. A system for prediction and control of a power module includes a gate driver circuit and a controller circuit. The gate driver circuit drives a target gate node of a target power transistor in response to a pulse width modulation signal, measures a target gate voltage, switches a desaturation signal in response to the target power transistor switching between an off-state and an on-state, measures a target transistor voltage, and measures a target transistor current. The controller circuit modulates the pulse width modulation signal to increase a target gate voltage, determines a target threshold voltage as the target gate voltage in response to the desaturation signal switching state, determines a target on-resistance based on the target transistor voltage and the target transistor current, and controlling the target power transistor based on the target threshold voltage and the target on-resistance.

A converter and an ANPC circuit driving method therefor. The ANPC circuit driving method includes: first, with the goal of enabling an ANPC circuit in a converter to respectively use inner transistors and outer transistors to bear switching loss in two half switching periods of a switching period, determining an output state switching sequence of the ANPC circuit; and then, generating and outputting switching transistor control signals of the ANPC circuit according to the output state switching sequence. Thus, the ANPC circuit can realize the balance of switching loss of the inner and outer transistors; moreover, the balance granularity of the switching loss is a half switching period, so that the balance effect is fine, and the loss fluctuation is low.

The embodiment of the utility model relates to an electronic device. An electronic device, an earphone speaker, comprising: a coil having a first terminal, a second terminal, and a third terminal; a switching circuit coupled to the third terminal and the second terminal of the coil; an amplifier coupled to the switching circuit and the first terminal, the amplifier including: a first transistor, a second transistor, a third transistor, and a fourth transistor, the switching circuit coupled between the third transistor and the fourth transistor, and the first terminal coupled between the first transistor and the second transistor; an audio generation circuit having a first terminal coupled to the amplifier between a third transistor and the first transistor, and a second terminal coupled to the amplifier between a second transistor and a fourth transistor; and a battery charging circuit coupled to the amplifier; and a processor coupled between the audio generation circuit and the switching circuit. According to the embodiment of the invention, the cost is favorably reduced, and the precious space in the earphone equipment is saved.

The invention relates to the technical field of new energy automobiles, in particular to a common positive bus multiplexing motor winding inductance boosting and current increasing heating system which comprises a power battery, a charging port, a driving system and a switch assembly. The power battery is provided with a self-heating loop, and positive and negative electrodes are connected with the charging port through a positive bus and a negative bus respectively to realize a battery self-heating mode; the driving system comprises a motor and a motor controller arranged between a positive bus and a negative bus, and the motor is provided with a three-phase winding inductor which is respectively connected to different transistors of the motor controller. The switch assembly is connected with two-phase winding inductors of the motor in parallel, one-phase winding inductors are connected in series, and the switch assembly comprises a plurality of switches arranged on positive and negative buses and is used for controlling the motor inductor to be connected with at least one of the negative electrode of the power battery, the negative electrode of the charging port or the positive bus, and the motor inductor is reused to achieve a direct fast charging mode, a boost charging mode or an up-current charging mode. Therefore, the problem that the electric vehicle is difficult to be compatible with charging piles of different voltage grades is solved.

An apparatus comprises a push-pull regulation loop (PPRL), an input terminal, an output terminal, and a plurality of flying capacitor (FC) circuits. The plurality of FC circuits comprises a corresponding plurality of capacitors. The PPRL comprises a PMOS transistor, an NMOS transistor, and a control circuit. The input terminal and the output terminal are coupled to a node of the PPRL via a rail. FC circuits of the plurality of FC circuits are coupled to each other. At least a first FC circuit of the plurality of FC circuits is coupled to the rail. A remaining subset of the plurality of FC circuits is coupled to the first FC circuit. An FC circuit of the plurality of FC circuits further comprises at least a first transistor switch and a second transistor switch coupled to a corresponding capacitor of the plurality of capacitors.

A power supply device includes a main battery, a backup battery, a first charge circuit, a second charge circuit, a first transistor, a second transistor, a switch element, and a control circuit. The first transistor has a control terminal for receiving a first control voltage, a first terminal coupled to the main battery, and a second terminal coupled to a first supply node. The second transistor has a control terminal for receiving a second control voltage, a first terminal coupled to the backup battery, and a second terminal coupled to a midway node. The switch element selectively couples the midway node to a second supply node according to a third control voltage. The control circuit monitors a first supply voltage at the first supply node, and generates the third control voltage according to the first supply voltage.

A test circuit, a display substrate and a display device relate to the technical field of display. The test circuit is located on one side of the display substrate and comprises a plurality of control lines extending in the first direction; the test lines extend along a second direction, and the second direction and the first direction intersect with each other; grid electrodes of the switch transistors are connected with the control lines, first poles of the switch transistors are connected with the test lines, and second poles of the switch transistors are connected with data lines in the display substrate; wherein the plurality of test lines comprise first test lines and second test lines which are arranged at intervals along a first direction, the plurality of switch transistors comprise first switch transistors and second switch transistors, the first switch transistors are connected with the first test lines, the second switch transistors are connected with the second test lines, and the first test lines and the second test lines are arranged along a second direction. The first switch transistor and the second switch transistor are staggered from each other.

The invention relates to a method for controlling an electrical system (1) including a motor, comprising: - an electric motor (2) configured to be supplied with power by multiple electrical phases (Iphase A, Iphase B and Iphase C), the electric motor in particular being a three-phase motor; - a control circuit (3) configured to control the supply of power from the electrical phases to the electric motor, this control circuit comprising switches, in particular transistor switches (5), these switches in particular being MOSFETs; - an electronic control unit (7) configured to supply PWM control signals to the switches of the control circuit in order to control them, the electronic control unit (7) furthermore being configured to generate an offset in the duty cycle of the PWM control signal for all of the phases when the amplitude of the voltage of the phases resulting from the applied duty cycle is less than a predetermined threshold value, this threshold value for example being equal to 20% or 25%, such that the PWM signal that is delivered increases, in particular continuously and proportionally, from a predetermined, non-zero starting value for any request for a PWM signal having a value lower than the predetermined threshold value.

This disclosure relates to systems and methods for power management in memory design. One device includes a first virtual power line, a second virtual power line, a first delay circuit, and a first wake-up detector. The first and second virtual power lines are coupled to a power source via a first set of transistor switches and a second set of transistor switches. The first delay circuit is coupled between the gate terminals of the first and second sets of transistor switches. The first wake-up detector is configured to generate a first trigger signal after receiving a signal from the first delay circuit.

A display substrate and a display device are provided. The display substrate includes: a plurality of pixel units arranged on a base substrate, each pixel unit includes a plurality of sub-pixels, and each sub-pixel includes a light emitting element and a pixel driving circuit; a semiconductor layer arranged on the base substrate; a first conductive layer arranged on a side of the semiconductor layer; and a second conductive layer arranged on another side of the semiconductor layer. The pixel driving circuit includes a driving transistor, a switching transistor and a sensing transistor; the switching transistor includes a first gate electrode and a first active layer; the display substrate further includes a channel defining portion for defining a channel region of the switching transistor, and an orthographic projection of the channel defining portion at least partially overlaps an orthographic projection of the first active layer on the base substrate.

A power supply device includes a main battery, a backup battery, a first charge circuit, a second charge circuit, a first transistor, a second transistor, a switch element, and a control circuit. The first transistor has a control terminal for receiving a first control voltage, a first terminal coupled to the main battery, and a second terminal coupled to a first supply node. The second transistor has a control terminal for receiving a second control voltage, a first terminal coupled to the backup battery, and a second terminal coupled to a midway node. The switch element selectively couples the midway node to a second supply node according to a third control voltage. The control circuit monitors a first supply voltage at the first supply node, and generates the third control voltage according to the first supply voltage.

The utility model discloses a dust detector through control luminous time to control luminous quantity, including setting in the detection area's luminous element, light receiving element and be used for to the light current signal of light receiving element in producing amplification amplifier circuit, control and detect light emission and light receiving signal's singlechip, the drive circuit of luminous element adopts transistor switch circuit to control luminous time, the drive circuit includes transistor and current -limiting resistance, luminous element, transistor and current -limiting resistance series connection with power supply and form the electric loop, the transistor trigger control end is controlledly connected in the singlechip, the utility model discloses dust sensor through control luminous time realizes to luminous element luminous quantity control, through the luminous quantity of luminous element accurate control, can improve dust sensor measurement result's accuracy and reliability.

An electromagnetic brake control circuit is applied to an electromagnetic brake and a motor. The electromagnetic brake comprises an electromagnet; the electromagnetic brake control circuit comprises a microcontroller, a first transistor switch and a first diode. The microcontroller is configured to transmit a pulse width modulation signal to the first transistor switch to turn on or turn off the first transistor switch. When the electromagnetic brake control circuit is in a follow current stage of a driving mode, the first transistor switch is configured to be cut off by the pulse width modulation signal transmitted by the microcontroller, so that a coil driving current sequentially flows through the electromagnet and the first diode and then returns to the electromagnet; the electromagnetic brake control circuit is configured to drive the electromagnetic brake so that the electromagnetic brake stops braking the motor.

Provided is a storage device that has a novel configuration. A first memory cell includes first to third transistors. A second memory cell includes fourth to sixth transistors. A switch circuit includes seventh and eighth transistors. One of the source and the drain of the seventh transistor is connected to one of the source and the drain of the first transistor and the gate of the second transistor. The other of the source and the drain of the seventh transistor is connected to one of the source and the drain of the fifth transistor and one of the source and the drain of the sixth transistor. One of the source and the drain of the eighth transistor is connected to one of the source and the drain of the second transistor and one of the source and the drain of the third transistor. The other of the source and the drain of the eighth transistor is connected to one of the source and the drain of the fourth transistor and the gate of the fifth transistor.

This buffer circuit comprises a first transistor that has a power source terminal to which a first voltage is applied, a control terminal which is connected to an output terminal of an operation amplifier, and an output terminal which is connected to a second input terminal of the operation amplifier. The buffer circuit comprises: a second transistor that has a power source terminal to which a second voltage is applied, a control terminal which is connected to the output terminal of the operation amplifier, and an output terminal which is connected to the second input terminal of the operation amplifier; and a control transistor that has a first connection terminal which is connected to the control terminal of the second transistor, a detection terminal which is connected to the second input terminal of the operation amplifier, and a second connection terminal which is connected to the output terminal of the operation amplifier. The second input terminal of the operation amplifier is connected to the output terminal of the buffer circuit, and when an output voltage of the buffer circuit is in the range from the first voltage to the second voltage on the basis of the potential difference between the operation amplifier and the output terminal of the buffer circuit, the control transistor switches a state between the control terminal of the second transistor and the output terminal of the operation amplifier to a conducting state.

The application provides a control integrated circuit and a step-down power converter, wherein a semiconductor switch module is turned on according to a high-level driving signal and generates a first low level, or is turned off according to a low-level driving signal and generates a first high level; a transistor switch module is turned on according to the first low level and an auxiliary power module and generates a second high level, or is turned off according to the first high level and generates a second low level; a transistor driving module increases an output voltage according to the second high level and the auxiliary power module until a switch transistor is turned on, or decreases the output voltage according to the second low level until the switch transistor is turned off. The application comprises a semiconductor driving assembly composed of the semiconductor switch module, the transistor switch module and the transistor driving module, so that there is no low-impedance connection relationship between a control module and a direct-current input voltage, and the application can be directly applied to a high direct-current input voltage and a large-duty-cycle application scenario, and has the advantages of small size, low cost and wide application range.