Electronic switching circuit employing capacitor filtering output and with front stage and back stage arranged isolatedly

Abstract

The invention discloses an electronic switch circuit that adopts capacitor filter output and is isolated from the front and rear stages. It is provided with an input terminal Ui, a load RL, a rectifier circuit and an electronic switch circuit. One end of the input terminal Ui passes through the connection between the load RL and the input terminal of the rectifier circuit. The first end is connected, and the other end of the input terminal Ui is connected to the second end of the input end of the rectifier circuit; the ground terminal of the input terminal of the control circuit is isolated from the ground terminal of the output filter circuit; on the output terminal of the rectifier circuit An indicator light circuit is also provided, and the resistance R1 and LED1 connected in series are arranged in the indicator light circuit, and the ground terminal of the indicator light circuit is connected with the ground terminal of the input terminal of the control circuit; the capacitor is used as the output filter circuit to reduce the design and While applying cost, it has a good filtering effect. It is equipped with an indicator circuit to observe in real time whether the working status of the circuit after the AC rectification output is normal, and to form a detection node for the inspection of the front and rear stages.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular, it is an electronic switch circuit which adopts capacitance filter output and isolates the front and rear stages. Background technique [0002] An electronic switch refers to an operating unit that uses electronic circuits and power electronic devices to realize circuit switching, including at least one controllable electronic drive device, such as thyristors, transistors, field effect transistors, thyristors, relays, etc. However, in actual use, electronic switches mainly refer to wall switches such as touch switches, induction switches, voice-activated switches, and wireless switches. [0003] The 555 timer is a medium-scale integrated device that combines analog and digital functions. Generally, the bipolar (TTL) process is called 555, and the complementary metal oxide (CMOS) process is called 7555. In addition to the single timer, there are corresponding dual timer...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when designing an electronic switch circuit, the ground terminals of the input circuit and the output circuit are often shared, resulting in mutual influence between the front and rear stages, poor switch sensitivity, and even electric shock accidents in severe cases.

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