Band-stop gas discharge tube, combined lightning protection device, protection circuit and electronic equipment

Abstract

The embodiment of the invention discloses a band-stop gas discharge tube, a combined lightning protection device, a protection circuit and electronic equipment. The band-stop gas discharge tube comprises: a first porcelain tube; a first electrode and a second electrode which are respectively arranged at two ends of the first porcelain tube, wherein the first porcelain tube, the first electrode andthe second electrode form a closed space, and the closed space is filled with gas; a built-in resistor, wherein one end of the built-in resistor is in contact with the first electrode for electric conduction, and the other end of the built-in resistor is in contact with the second electrode for electric conduction, so that the built-in resistor is connected between the first electrode and the second electrode in parallel. Compared with the prior art, the protection performance of the protection circuit is improved, the service life of the protection circuit is prolonged, on the basis, the built-in resistor is integrated in the band-stop gas discharge tube, the overall structure of the protection circuit can be simplified, the compactness of the protection circuit is better, and the protection circuit can be applied to tight equipment installation.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of lightning protection, in particular to a gas discharge tube with resistance, a combined lightning protection device, a protection circuit and electronic equipment. Background technique [0002] Electronic equipment has been widely used in rail transit, automotive electronics, communications, new energy, security, consumer electronics, industrial electronics, medical electronics and other industries, and its performance is directly related to whether the related equipment can work safely and reliably. [0003] In order to ensure that electronic equipment can work safely and reliably, protective circuits are often designed at the power ports of electronic equipment. In the prior art, it is very common to use a piezoresistor (Metal Oxide Varistor, MOV) in series with a gas discharge tube (Gas Discharge Tube, GDT) to set up a protection circuit. Among them, in order to reduce the re...

AI Technical Summary

Problems solved by technology

In this way, when the surge voltage is generated, the start-up impedance of the gas discharge tube is small, and the voltage loaded on the gas discharge tube is small; however, the varistor will bear a large surge voltage, resulting in the varistor due to transient overshoot. The voltage was broken down, and even caught fire

Therefore, the existing protection circuit has the problems of poor protection performance and low service life

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