A multi-channel correlated low-frequency noise testing device and analysis method

Abstract

The invention discloses a multi-channel related low-frequency noise testing device and analysis method. The testing device includes: a device to be tested module, which is used to provide an external bias voltage for the device to be tested and introduce noise that needs to be paid attention to by the device to be tested. signal and output; the first noise test path is used to amplify and digitally sample the first small signal noise output by the DUT module to obtain the first digital noise signal; the second noise test path is used to Amplifying and digitally sampling the second small signal noise output by the device-under-test module to obtain a second digital noise signal; the spectrum analysis module is used to calculate each channel separately for each channel according to the sampled two-channel data noise spectrum, and then perform correlation analysis or noise elimination between the two channels.

Description

technical field [0001] The invention relates to the technical field of low-frequency noise testing, in particular to a multi-channel related low-frequency noise testing device and analysis method. Background technique [0002] With the continuous improvement of the precision of electronic equipment, higher requirements are put forward for the stability of the device. The internal noise of the device has become a key factor restricting high-precision equipment. The fluctuation of carriers inside the device forms the main noise of the device. Therefore, carrying out device noise test and analysis has become one of the key means to measure the quality of the device. At the same time, there is a close relationship between the low-frequency noise characteristics of the device and the reliability of the device. It is of great significance to carry out the test and analysis of the low frequency noise of the device. [0003] Low-frequency noise test equipment is currently mainly ...

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Problems solved by technology

[0009] In order to overcome the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a multi-channel related low-frequency noise testing device and analysis method, so that the generation of noise can be better analyzed by measuring the noise of the two channels respectively stage, it helps to better extract the spectrum characteristics, and at the same time, by using the spectrum transfer characteristics, the elimination of common mode noise between channels can be realized, and the problem of common mode noise that cannot be eliminated in the traditional measurement process can be solved

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