A mos field effect transistor drive circuit and control method

Abstract

The invention discloses a MOS field effect transistor drive circuit and a control method, belonging to the technical field of drive circuits. The existing drive circuit built with discrete components cannot effectively ensure the same delay for the two edges of the input PWM signal, resulting in signal transmission distortion. A MOS field effect transistor drive circuit of the present invention is provided with an edge detection module A and a delay module B, which are used to divide two edges of an INPUT input pulse signal into two signal channels A and B for processing respectively. The edge detection module A is used to generate a pulse signal to an edge of the input pulse signal; the delay module B is used to delay the two edges of the input pulse signal respectively; the present invention sets the edge detection module A and delay module B, so that the delay of the rising edge of the input pulse signal can be adjusted and matched with the delay of the falling edge, which can effectively ensure that the delay of the two edges of the input pulse signal is the same, realize accurate transmission of the signal, and avoid signal Transmission distortion, especially suitable for high frequency driving occasions.

Description

technical field [0001] The invention relates to a MOS field effect transistor drive circuit and a control method, belonging to the technical field of drive circuits. Background technique [0002] Chinese patent (publication number: CN110798199A) discloses a MOS tube drive circuit, the MOS tube drive circuit is connected to the MOS tube, and the MOS tube drive circuit includes: a drive power supply, a level conversion module and a push-pull module; a drive power supply Connect with the level conversion module and the push-pull module respectively, provide the voltage to be converted for the level conversion module, and provide the working voltage for the push-pull module; the level conversion module converts the voltage to be converted provided by the driving power supply, and supplies The module outputs the gate voltage; the push-pull module receives the gate voltage, and combines the working voltage provided by the driving power supply to push-pull the gate of the MOS tube ...

AI Technical Summary

Problems solved by technology

However, the driving circuit of the above scheme cannot effectively ensure that the two edges of the input PWM signal have the same delay

When the operating frequency is relatively low, the ratio of the two edge delays to the signal cycle is not high. This difference has little effect on the accuracy of signal transmission; but when the frequency increases, this ratio increases sharply, resulting in signal transmission distortion

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