Resistance interference prevention method between circuit boards

Abstract

The invention provides a resistance interference prevention method between circuit boards. The method comprises the following steps of S1, providing a circuit board card and respectively arranging thefirst circuit board and the second circuit board on the circuit board card, S2, respectively arranging a first plug and a second plug on the circuit board card, arranging a first shield cover betweenthe first plug and the first circuit board, and arranging a second shield cover between the second plug and the second circuit board, and S3, internally connecting all input and output lines of the first circuit board with the first plug by the first shield cover, and internally connecting all input and output lines of the second circuit board with the second plug by the second shield cover. Themethod improves the interference prevention capacity between the circuit boards.

Description

technical field [0001] The invention belongs to the technical field of circuit boards, and in particular relates to an anti-resistance interference method between circuit boards. Background technique [0002] At present, in various microcomputer control devices, especially in microcomputer relay protection devices, it is a relatively common problem that strong electric signals are serially inserted into weak electric circuits to interfere with the normal operation of the devices. For this reason, in conventional devices, measures such as isolation and filtering have been adopted, which have produced certain positive effects, but the effects are not very satisfactory. Research has shown that the source of interference is mainly the surge (analog quantity) introduced from the outside through the device terminals. input, digital input, output, DC power input, etc.). In the existing device, the strong current, weak current terminals and loops are mixed on the chassis structure ...

AI Technical Summary

Problems solved by technology

For this reason, in conventional devices, measures such as isolation and filtering have been taken, which have produced certain positive effects, but the effects are not very satisfactory. Studies have shown that the source of interference is mainly the surge (analog quantity) introduced from the outside through the terminals of the device. input, digital input, output, DC power supply line, etc.)

However, in the existing devices, the structure of the chassis and the arrangement of the terminals are mixed with strong and weak current terminals and circuits. Due to the characteristics of high frequency and frontier common mode interference, it is easy to be connected to the system through distributed capacitance, which reduces the product quality. anti-interference ability

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