Protection circuit of pulse electronic lock

Abstract

The invention provides a protection circuit of a pulse electronic lock, which comprises a dual-channel field-effect transistor which alternately outputs a first pulse voltage and a second pulse voltage; a limiting circuit which is connected to the input end of the dual-channel field effect transistor, wherein a first supply power supply and a second supply power supply with opposite polarities areinput into the limiting circuit, the dual-channel field effect transistor comprises a first band field effect transistor and a second band field effect transistor, wherein the drain of the first bandfield effect transistor outputs the first pulse voltage, the drain of the second band field effect transistor outputs the second pulse voltage, and the first pulse voltage and the second pulse voltage are opposite in polarity and identical in magnitude. The pulse voltage is directly provided by the power supply, so that the problem of unlocking failure caused by insufficient instantaneous currentof the traditional electrolytic capacitor during discharging is effectively avoided; and the problem that the pulse type electronic lock is damaged due to continuous output of output pulse voltage caused by control failure of the power supply is effectively prevented.

Description

technical field [0001] The invention belongs to the field of circuit technology, in particular to a protection circuit for a pulse electronic lock. [0002] technical background [0003] At present, the electronic lock of the pulse charging gun adopts the capacitor plate method, which has the following problems: [0004] First, the capacitance of the capacitor plate needs a large capacitance, and the capacitance error is serious at low temperature, and the cost is high. [0005] Second, when the electronic lock is unlocked, the capacitive discharge current does not last long enough, which makes it prone to unlock failure. [0006] Third, when emergency unlocking is required, a lock must be performed first to charge and store the capacitor, which may cause malfunction and low reliability Contents of the invention [0007] The object of the present invention is to provide a protection circuit for a pulse electronic lock that avoids failure of unlocking the electronic lock a...

AI Technical Summary

Problems solved by technology

[0004] First, the capacitance of the capacitor plate needs a large capacitance, and the capacitance error is serious at low temperature, and the cost is high

[0005] Second, when the electronic lock is unlocked, the capacitor discharge current does not last long enough, resulting in easy unlock failure

[0006] Third, when emergency unlocking is required, a lock must be performed first to charge and store the capacitor, which may cause malfunction and low reliability

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