Anti-noise interference self-adaptive reset narrow pulse generation circuit

A technology for resetting circuits and generating circuits, applied in pulse generation, electric pulse generation, pulse technology, etc., can solve problems such as noise interference, eliminate influence, balance conduction power consumption and anti-noise interference, and reduce conduction power consumption Effect

CN114039577APending Publication Date: 2022-02-11无锡安趋电子有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-02-11

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Abstract

The invention discloses an anti-noise interference self-adaptive reset narrow pulse generation circuit. A self-adaptive reset circuit, a discharge pulse circuit, an either-or selection circuit, a voltage comparator and a level signal and self-adaptive current signal generation circuit are additionally arranged on the basis of a traditional setting and resetting circuit; a self-adaptive reset signal output by the self-adaptive reset circuit and a reset signal output by the traditional reset circuit jointly serve as input signals of the alternative selection circuit, and when the width of generated common-mode dv / dt noise is larger than or equal to the width of an input pulse, the voltage comparator controls the either-or selection circuit to select a self-adaptive reset signal and a setting signal output by the traditional setting circuit to jointly form a driving signal of a post-stage high-voltage level shift circuit; on the contrary, the reset signal output by the traditional reset circuit and the setting signal output by the traditional setting circuit are selected to jointly form the driving signal of the post-stage high-voltage level shift circuit.
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Description

technical field

[0001] The invention relates to a two-way narrow pulse generating circuit for driving a high-voltage level shift circuit, in particular to an anti-noise interference adaptive reset narrow pulse generating circuit, which belongs to the technical field of analog integrated circuits (drive chips). Background technique

[0002] Most of the power electronic chips or integrated circuit driver chip systems on the market now have two narrow pulse generator circuits. This circuit uses RC delay technology to generate two pulses on the rising and The narrow pulse signal is output to the high-voltage level shift circuit. The narrow pulse generating circuit belongs to one of the typical circuits of high voltage integrated (HVIC). This type of HVIC has a wide range of applications in LCD display, motor drive, and other consumer electronics and industrial control fields, all of which require high-voltage and low-voltage compatible processes, and use high-voltage LDMOS devi...

Examples

Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0029] Such as image 3 , on the basis of the prior art setting circuit 001 and reset circuit 002, the present invention adds an adaptive reset circuit 003, a discharge pulse circuit 004, a two-to-one selection circuit 005, a voltage comparator 006, a level signal and an adaptive current The signal generating circuit 007, the input pulse IN is respectively connected to the level signal and an input end of the adaptive current signal generating circuit 007, an input end of the adaptive reset circuit 003 and an input end of the discharge pulse circuit 004, and the adaptive current signal generating circuit The other input signal of 007 is the pulse signal Vdischarge output by the discharge pulse circuit 004, and the level signal and ada...