3results about How to "High voltage accuracy" patented technology

The utility model discloses a passive adjustable voltage clamping circuit with a temperature protection function, which comprises an input positive end IN +, an input negative end IN-, a diode D1, a diode D2, a diode D3, a triode Q1, a field effect transistor Q2, a triode Q3, a controllable precise voltage stabilizing source N1, a temperature sensor RT1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a slide rheostat R8, the input positive end IN + and the input negative end IN-serve as input power sources, the clamping circuit works passively and can bear very high power, and the bearing power depends on the peak power of the field efficiency tube; the clamping voltage is adjustable, the voltage precision is high, the error is controlled below 1%, the field effect transistor Q2 has an over-temperature protection function, the circuit is prevented from being damaged due to thermal breakdown when external high voltage lasts for a long time, the circuit is simple, the circuit is composed of discrete components, the cost is low, implementation is easy, and the cost performance is high.

This application provides a constant voltage control circuit and electronic device, relating to the field of electronic power. The constant voltage control circuit includes a sampling circuit, a driving circuit, a signal output circuit, and a voltage feedback circuit. The driving circuit receives a sampled electrical signal output from the sampling circuit and outputs a driving signal based on the magnitude relationship between the sampled electrical signal and a reference electrical signal. The signal output circuit is connected to the sampling circuit and the driving circuit, and outputs a load voltage signal based on the sampled electrical signal and the driving signal. The voltage feedback circuit generates a voltage feedback signal based on the load voltage signal. The voltage feedback signal adjusts the reference electrical signal from a first reference voltage to a second reference voltage, so that the load voltage signal output by the signal output circuit is within a preset voltage range. The embodiments of this application aim to improve the voltage accuracy of the power module output voltage, reduce the cost of the power module, and improve the stability of the power module.

The application discloses a voltage division offset compensation control circuit and a voltage division offset compensation method. The voltage division offset compensation control circuit comprises: a voltage stabilizing circuit, which is used for sampling an output voltage VO to form a feedback voltage signal, comparing the feedback voltage signal with a reference voltage VREF, and generating an adjustment control signal to adjust the output voltage VO. A compensation circuit is connected with a feedback node of the voltage stabilizing circuit, used for generating a compensation current IX based on the change of the output voltage VO, and injecting the compensation current IX into the feedback node of the voltage stabilizing circuit to offset the voltage division offset caused by the change of the output voltage VO, so that the feedback signal maintains a constant voltage division ratio under different output voltages. The application can eliminate the resistance voltage division error caused by the change of the output voltage in the voltage stabilizing circuit, and ensure the high-precision output of the voltage stabilizing circuit.