Circuit control system for eliminating ground noise of electronic equipment

Abstract

The invention discloses a circuit control system for eliminating ground noise of electronic equipment. The circuit control system comprises an input signal processing circuit, a synchronization signal detector, a multi-path electronic control switch and a MCU (Micro Controller Unit) master controller, wherein the synchronization signal detector is used for detecting the input signal waveform of the electronic equipment; an output end of the synchronization signal detector is electrically connected with the MCU master controller; the multi-path electronic control switch is electrically connected with the digital ground, the signal ground, the analog ground and the ground of the electronic equipment circuit for controlling automatic opening or automatic closing of the digital ground, the signal ground, the analog ground and the ground of the electronic equipment circuit respectively; and the MCU master controller is used for controlling the multi-path electronic control switch according to a detection result of the synchronization signal detector. According to the circuit control system for eliminating the ground noise of the electronic equipment, the digital ground and the analog ground in the electronic equipment circuit system can be automatically opened and closed, and the signal-noise ratio of the electronic equipment circuit system can be reduced.

Description

technical field [0001] The present invention relates to the technical field of electronic equipment, in particular to a circuit control system for eliminating noise of electronic equipment. Background technique [0002] At present, with the development of science and technology, the development of electronic technology is changing with each passing day, and the precision of electronic equipment is also getting higher and higher. [0003] figure 2 It is the schematic diagram of the input signal processing circuit of the existing electronic equipment; such as figure 2 As shown, when an inverting amplifier is used in an existing electronic device, a method of inputting a signal at the non-inverting end of the inverting amplifier and grounding the inverting end of the inverting amplifier is used to process the circuit signal of the electronic device. If the circuit of this structure is not properly handled, there will be a voltage difference between the ground of the input sig...

AI Technical Summary

Problems solved by technology

When the interference of the ground wire is as large as the input signal, it will cause abnormal problems in the operation of electronic equipment.

With the continuous development of new technologies for electronic equipment, the circuits of electronic equipment have become more and more complex. Sometimes it is necessary to separate the digital ground from the analog ground, and sometimes it is necessary to close the digital ground and the analog ground. However, the existing electronic equipment circuit cannot meet this requirement

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