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Network phase shift parameter measurement method and network phase shift parameter measurement circuit

A network and parameter technology, applied in the field of network phase shift measurement in the field of electronic measurement technology, can solve the problems of low measurable frequency, low measurement accuracy, low precision, etc. Effect

Pending Publication Date: 2017-08-25
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The network analyzer has high measurement accuracy, but the instrument is expensive; the oscilloscope measurement method is limited by human factors and the measurement accuracy is low; the voltage measurement method based on the XOR gate has complex circuits, low measurable frequency, and low accuracy

Method used

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  • Network phase shift parameter measurement method and network phase shift parameter measurement circuit
  • Network phase shift parameter measurement method and network phase shift parameter measurement circuit
  • Network phase shift parameter measurement method and network phase shift parameter measurement circuit

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Embodiment Construction

[0016] In conjunction with the accompanying drawings, the method for measuring network phase shift parameters of the present invention proceeds according to the following steps:

[0017] a. Choose an integrated phase detector and frequency detector MC12040, its two pulse input terminals are R and V respectively, and the phase detector output terminal is U.

[0018] b. Select a function signal generator, divide the reference sine wave signal of the set frequency output by it into two paths, and one path passes through the DC blocking capacitor C 1 Connect to the non-inverting input terminal of the zero-crossing comparator 1 composed of ADPCM600, and connect the other to the input terminal of the network to be tested. The output of the network to be tested passes through the DC blocking capacitor C 2 Then connect to the non-inverting input terminal of the zero-crossing comparator 2 composed of ADPCM600.

[0019] c. Ground the inverting inputs of both zero-crossing comparators A...

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Abstract

The invention belongs to the technical field of electronic measurement, and particularly relates to a network phase shift parameter measurement method and a network phase shift parameter measurement circuit. A function signal generator is used to output reference sinusoidal signals whose frequency can be set; two zero crossing comparators convert inputted reference signals and signals outputted by a measured network into pulse signals respectively; an integrated phase detection discriminator then carries out phase detection on the two pulse signals; and under DSP control and operation, accurate phase shift parameters of the measured network are obtained and displayed. The high-speed phase detection technology and the DSP quick operation and processing, accurate measurement on the phase shift parameters of the measured network can be realized.

Description

technical field [0001] The invention relates to a network phase shift measurement technology in the technical field of electronic measurement, in particular to a method and a circuit for measuring network phase shift parameters. Background technique [0002] In the fields of communication, instrumentation, etc., in order to achieve a specific purpose, it is often necessary to use a circuit network to perform a certain phase delay on the transmitted signal. This phase delay is usually referred to as phase shift. Whether the phase shift can accurately reach the set value will often affect the quality of communication or the accuracy of the instrument, so it is very necessary to accurately measure the phase shift value of the network. Sometimes in order to evaluate the impact of a network on signal transmission quality, it is also necessary to measure the phase shift of the network to be transmitted signal. [0003] There are many traditional network phase shift parameter meas...

Claims

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Application Information

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IPC IPC(8): G01R27/28
CPCG01R27/28
Inventor 司朝良张广渊吴昌平潘为刚饶中洋
Owner SHANDONG JIAOTONG UNIV