AC circuit characteristic parameter measuring device based on effective value detection

Abstract

The invention discloses an AC circuit characteristic parameter measurement device based on effective value detection. The device comprises an input impedance measurement circuit, an output impedance measurement circuit, an AC gain detection circuit, a peak detection module, a swept-frequency signal generator, a single-chip microcomputer and a display screen. According to the resistance voltage division and effective value detection principle, the voltage division and gain of the swept-frequency signal by the to-be-detected circuit are detected, rapid and accurate measurement of the to-be-detected circuit is achieved, the AC characteristic parameters of the to-be-detected circuit can be measured in several seconds, and the upper and lower limit cut-off frequencies of the circuit are measured. According to the system, high-precision effective value detection is adopted, digital processing is carried out on a detected result, and the measurement accuracy can be improved while the alternating current characteristic of a circuit is rapidly measured. The innovative point of the invention is that AC effective value detection is used for circuit characteristic measurement, and meanwhile, the rapidness and effectiveness of measurement are ensured.

Description

technical field [0001] The invention relates to the technical field of circuit parameter detection, in particular to an AC circuit characteristic parameter measurement device based on effective value detection. Background technique [0002] With the continuous development of the electronic information industry, the measurement requirements of the AC characteristic parameters of the circuit are becoming more and more extensive. The usual measurement uses existing instruments such as oscilloscopes for partial pressure measurement and conversion, which is time-consuming and has insufficient precision, and special instruments are more expensive. [0003] At present, many precision circuits use the scheme of mean value detection or peak detection for conversion calculation. Although the accuracy has been improved, most of them are not applicable to a very wide frequency range. [0004] Therefore, how to measure the AC circuit characteristics simply, quickly and accurately while ...

AI Technical Summary

Problems solved by technology

The usual measurement uses the existing oscilloscope and other instruments for partial voltage measurement and conversion, which is time-consuming and has insufficient precision, and the special instruments are more expensive

[0003] At present, many precision circuits use the scheme of mean value detection or peak detection for conversion calculation. Although the accuracy has been improved, most of them are not suitable for a wide frequency range.

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