Electromagnetic compatibility pre-amplifier and control method thereof

Abstract

The invention relates to the technical field of electromagnetic compatibility, in particular to an electromagnetic compatibility pre-amplifier and a control method thereof. The electromagnetic compatibility pre-amplifier comprises a power supply circuit, a power supply filter circuit, an amplifying tube, an input coupling circuit and an output coupling circuit, wherein the power supply filter circuit is connected with the power supply circuit; the amplifying tube is connected with the power supply filter circuit; the input coupling circuit and the output coupling circuit are both connected with the amplifying tube; the input coupling circuit is connected with a signal input end; the output coupling circuit is connected with a signal output end. The utility model provides the electromagnetic compatibility pre-amplifier which is low in cost, low in noise, high in stability, and wide in frequency band. The electromagnetic compatibility pre-amplifier is applicable to the design, the analysis and the rectification of the electromagnetic compatibility circuit, and can analyze the source of the electromagnetic noise visually and accurately, be positioned quickly, and solve the problem of electromagnetic compatibility of the product. Through the application of the electromagnetic compatibility pre-amplifier and the control method, the high cost for purchasing the pre-amplifier is saved, and the measurement and analysis and the rectification of electromagnetic noise lower than ambient noise level are realized in natural space environments without professional facilities such as a shielded room or an anechoic chamber.

Description

technical field [0001] The present invention relates to the technical field of electromagnetic compatibility, and more specifically, to an electromagnetic compatibility preamplifier and a control method thereof. Background technique [0002] In the field of electromagnetic compatibility, in the radiation disturbance test of the electromagnetic compatibility test item of the product, in order to obtain a lower background environmental noise level, a preamplifier is usually used for signal amplification processing. This type of amplifier is characterized by broadband, high gain, and good signal flatness. Select the appropriate bandwidth and gain according to actual needs to meet the needs. In terms of electromagnetic compatibility design, analysis and rectification of circuits, for some electromagnetic noise signals with low energy in the product, in the natural space environment, due to the existence of various broadcast, communication, satellite and other signals, if you wan...

AI Technical Summary

Problems solved by technology

[0003] In the electromagnetic compatibility testing industry, a large part of preamplifier products are designed and produced by foreign manufacturers, and the procurement cost is very high. The preamplifier itself is a sensitive electronic device, and factors such as static electricity carried by the human body, input signal overload, and power fluctuations , are prone to malfunction or damage

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