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Overvoltage surge suppression circuit

A surge suppression circuit and suppression circuit technology are applied in the fields of MOS field effect transistors, surge suppression, and airborne electrical equipment, which can solve the problems of poor anti-interference ability, poor reliability and high cost, reduce costs and improve durability. Effects of Overvoltage Reliability

Pending Publication Date: 2021-03-09
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a suppressing circuit capable of eliminating the influence of the overvoltage surge of the power supply voltage on the subsequent load performance, and to solve the problem of high cost, poor reliability and low anti-interference ability of the overvoltage surge suppressing circuit in the prior art. Poor technical issues

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Embodiment Construction

[0018] The invention is a surge suppression circuit based on MOS field effect transistor. This invention mainly utilizes the working characteristics of MOS field effect transistors, and uses the output signal of the booster circuit as the control terminal to construct a surge suppression circuit. Its principle block diagram is as follows: figure 2 shown.

[0019] The principle of the surge suppression circuit is to use the linear region characteristics of the MOS field effect tube. Here, the NMOS field effect tube is taken as an example. When U DS > U GS -U GS(off) (i.e. U GD GS(off) ), i D Do not follow U DS changes, the value depends only on U GS , when U GS When it is a constant value, i D is also a constant value, so i D Approximate voltage U GS controlled constant current source. Let the drain (D terminal) of the NMOS field effect transistor be the input terminal, the source (S terminal) be the output terminal, and the gate (G terminal) be the control terminal...

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Abstract

The invention possibly relates to the technical field of surge suppression, MOS field effect transistors, airborne electric equipment and the like, in particular to an overvoltage surge suppression circuit. The circuit comprises an MOS field effect transistor, a grid electrode of the MOS field effect transistor is connected with fixed voltage, and a source electrode and a drain electrode of the MOS field effect transistor serve as an input end and an output end respectively. The input end is connected with a power supply, and the output end is connected with a load. According to the invention,the surge suppression circuit is constructed by using the working characteristics of the MOS field-effect transistor and taking the output signal of the boosted circuit as the control end. Accordingto the surge suppression circuit design method, the circuit can stably work for a long time under the overvoltage condition, the requirement for the range of a power supply is lowered, the overvoltageresistance reliability of a product is improved, and meanwhile the cost is reduced.

Description

technical field [0001] The present invention may relate to technical fields such as surge suppression, MOS field effect transistors, and airborne electrical equipment, and particularly relates to an overvoltage surge suppression circuit. Background technique [0002] At present, there are mainly two types of surge suppression circuits for electronic controller power supplies, one is a modular surge suppression circuit, and the other is a simple surge suppression circuit based on MOS field effect transistors. [0003] The modular surge suppression circuit is mainly aimed at the 80V / 50ms electrical equipment that should meet the requirements of GJB181-86 or the 50V / 50ms that the airborne electrical equipment should meet the requirements of GJB181A-2003. Electrical equipment shall not be designed for any failure. The modular surge suppression circuit has the characteristics of low matching and high price. The internal structure of the module is solidified, and there are certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/04
Inventor 徐璐薛国杰胡静杨晓强
Owner XIAN AERO ENGINE CONTROLS