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High common-mode transient suppression differential signal receiving circuit for high-voltage gate driving chip

A driver chip, transient suppression technology, applied in the direction of electrical components, electronic switches, pulse technology, etc., to achieve the effect of stable data output

Pending Publication Date: 2021-07-09
HUANGSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a differential signal receiving circuit with high common-mode transient noise suppression characteristics for the unavoidable common-mode transient interference noise problem in the system application of high-voltage insulation isolation barrier drive chips

Method used

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  • High common-mode transient suppression differential signal receiving circuit for high-voltage gate driving chip
  • High common-mode transient suppression differential signal receiving circuit for high-voltage gate driving chip
  • High common-mode transient suppression differential signal receiving circuit for high-voltage gate driving chip

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0033] Such as Figure 4 As shown, the circuit structure of the present invention includes: input receiving circuit 1, common-mode adjustable amplifier circuit 2 (CM1~CMX) cascaded before and after X stages, high-sensitivity common-mode adjustable amplifier circuit 3 (CMN), output shaping circuit 4 and common mode adaptive adjustment circuit 5.

[0034] Input receiver circuit 1 first receives the figure 2 The transmission circuit shown in the figure couples in the positive terminal receiving signal RXP and the negative terminal receiving signal RXN of the differential signal through the isolation capacitor, and after filtering, the positive terminal input signal Vip and the negative terminal input signal Vin are obtained; the positive terminal input signal Vip and the negative terminal input signal The signal Vin then enters the common-mode...

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Abstract

The invention discloses a high common-mode transient suppression differential signal receiving circuit for a high-voltage gate driving chip. The circuit comprises an input receiving circuit, X stages of common-mode adjustable amplifying circuits CM1-CMX which are cascaded front and back, a high-sensitivity common-mode adjustable amplifying circuit CMN, an output shaping circuit and a common-mode self-adaptive adjusting circuit. According to the high common-mode transient suppression differential signal receiving circuit provided by the invention, on one hand, the magnitude of ground potential common-mode transient noise can be automatically detected, and the error generated by the common-mode transient noise is dynamically compensated when the noise exceeds a threshold value; and on the other hand, the output shaping circuit further adopts RC low-pass filtering and Schmitt trigger combined filtering to filter out the influence of high-frequency noise, so that stable data output is generated. The circuit can be widely applied to various high-voltage insulated isolated gate driving chips and data isolators.

Description

technical field [0001] The invention relates to a high-common-mode transient suppression differential signal receiving circuit for a high-voltage gate drive chip, which belongs to the technical field of integrated circuits. Background technique [0002] Driven by emerging industries such as smart grids, mobile communications, and new energy vehicles, power electronics application systems require further improvement of system efficiency, miniaturization, and additional functions, especially the trade-off between size, quality, power, and efficiency of system equipment , such as server power management, battery chargers, and microinverters for solar farms. The new generation of power electronics system puts forward higher requirements for the reliability, speed and intelligence of the internal high-voltage gate driver chip, so as to further improve the reliability of the whole machine and reduce the design complexity of the whole machine system. As a bridge between the signal...

Claims

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Application Information

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IPC IPC(8): H03K17/16H03K17/567H03K17/687
CPCH03K17/161H03K17/168H03K17/567H03K17/687
Inventor 陈珍海宁仁霞汪礼何宁业许媛鲍婕吕海江
Owner HUANGSHAN UNIV
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