Suppression and filter circuit

Abstract

The invention belongs to the technical field of electronic circuits, and relates to a suppression and filter circuit. When a large impact current exists in a rear-end circuit in a product, front-end power supply equipment or a switch may be damaged, the impact current is effectively suppressed, and filtering and isolation effects can be taken into account at the same time. Compared with a traditional current suppression circuit, the circuit can effectively solve the problem that input and output possibly bypass a device through a shell at the moment of power-on so that the device loses the suppression capability, filtering and current suppression are designed into an integrated circuit, meanwhile, an optocoupler is used as a core switch device, and the product can effectively play an isolation role after working normally. The circuit has the characteristics of simple circuit structure, integration of current suppression and filtering, low power consumption, strong anti-interference capability and the like.

Description

Technical field [0001] The present invention belongs to the technical field of electronic circuits, and involves a suppression and filtering circuit. Background technique [0002] In the circuit design, often due to a larger value-value-pair capacitor due to the rear end circuit, the product is powered on the product, which may cause damage to the front-end power supply device or switch, often on this shock. The current is suppressed, but it has to take care of the filtering effect in the circuit. This circuit will filter the filter and current suppression as an integrated circuit, and use optocoupler as a core switching device, and the product can effectively function. It has the characteristics of simple circuit structure, current inhibition and filter integration, low power consumption, strong anti-interference ability. Inventive content [0003] It is an object of the present invention to use a suppression and filter circuit to solve the impact current inhibition in the circ...

AI Technical Summary

Problems solved by technology

[0002] In circuit design, there is often a large capacitance to ground capacitance in the back-end circuit, which will generate a large inrush current when the product is powered on. Long-term use may cause damage to the front-end power supply equipment or during switching. The current is suppressed, but at the same time, the filtering effect in the circuit has to be taken into account. This circuit designs the filtering and current suppression as an integrated circuit, and uses the optocoupler as the core switching device. After the product works normally, it can effectively play an isolation role.

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