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A high-voltage gate drive circuit with anti-noise

A driving circuit and high-voltage gate technology, applied in logic circuit interface devices, eliminating voltage/current interference, logic circuit connection/interface layout, etc., to reduce conduction time, reduce power consumption, and reduce narrow pulse width required effect

Active Publication Date: 2021-05-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of interference noise, narrow pulse width requirement and power consumption in the above-mentioned traditional high-voltage gate drive circuit, the present invention provides a high-voltage gate drive circuit capable of resisting noise interference, so as to eliminate common-mode noise interference without Affects the transmission of normal signals, lower power consumption and can be applied to narrower narrow pulse signals

Method used

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  • A high-voltage gate drive circuit with anti-noise
  • A high-voltage gate drive circuit with anti-noise
  • A high-voltage gate drive circuit with anti-noise

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Embodiment Construction

[0034] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] like figure 2 Shown is an anti-noise high-voltage gate drive circuit proposed by the present invention, including a high-voltage level shift module 1, a common-mode noise elimination composed of a first common-mode noise elimination module CMR1 and a second common-mode noise elimination module CMR2 Circuit 2, SR latch 3 and drive module 4. The high-voltage grid drive circuit proposed by the present invention mainly uses narrow pulses to reduce the power consumption of the circuit. The high-voltage level shift module 1 includes two input terminals and three output terminals, which are used to transfer the input two-way low-voltage pulse control signals Converted into a high-voltage pulse signal, together with the output of the high-voltage common-mode signal, the signal level is improved through the LDMOS tub...

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Abstract

An anti-noise high-voltage gate drive circuit belongs to the technical field of analog integrated circuits. It includes a high-voltage level shift module, a common-mode noise elimination circuit, an RS latch and a drive module. The high-voltage level shift module improves the signal level through LDMOS tubes, and converts the input two-way low-voltage pulse control signals. The high voltage pulse signal is output to the common mode noise cancellation circuit together with the high voltage common mode signal. The common mode noise cancellation circuit uses the principle of the differential mode amplifier to eliminate the common mode noise. The RS latch and the drive module will eliminate the noise. The pulse signal is converted into an output signal for driving the high-side power tube. The invention can eliminate various common mode interference noises, can be applied to narrower narrow pulse input signals, and has lower circuit power consumption.

Description

technical field [0001] The invention belongs to the technical field of analog integrated circuits, and relates to an anti-noise high-voltage gate drive circuit. Background technique [0002] In power chips or integrated circuit driver chips, there are high-voltage gate drive circuits, which use high-voltage level shift technology to realize the conversion from low voltage to high voltage to drive high-side power transistors. The high-voltage gate drive circuit is a typical circuit of the high-voltage integrated circuit (HVIC). This type of high-voltage gate drive circuit has a wide range of applications in the fields of motor drive, flat panel display and other consumer electronics. The low-voltage control signal is converted into a high-voltage control signal to drive the high-end circuit to work. Generally, this type of high-voltage gate drive circuit system adopts a half-bridge topology. [0003] The half-bridge driver chip is mainly used to drive the power tube of the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0175H03K19/003
CPCH03K19/00361H03K19/017509
Inventor 方健王定良雷一博张波王卓
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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