Threshold level setting method of mixed signal logic analyzer

Abstract

The invention discloses a threshold level setting method of a mixed signal logic analyzer, which mainly comprises the following steps that: the mixed signal logic analyzer captures a mixed signal, themixed signal comprises a first digital signal and a first analog signal, and the mixed signal logic analyzer can separate out a digital/analog signal. The mixed signal logic analyzer can further convert the separated first analog signal into a second digital signal and then detect the converted second digital signal, and the mixed signal logic analyzer can calculate the numerical value of the threshold voltage in one signal period so that the mixed signal logic analyzer can calculate the threshold voltage according to the calculated threshold level. The digital signal part of the mixed signalis triggered.

Description

technical field [0001] The invention relates to the field of electronic signal measurement, in particular to a logic analyzer capable of processing mixed signals, and the logic analyzer can calculate the threshold level based on the analog part of the mixed signal, and then provide the digital signal in the mixed signal with the threshold level. Part of the processing, specifically a method for setting the threshold level of a mixed signal logic analyzer. Background technique [0002] Due to the popularity of digital signals and digital communication protocols, there is an increasing demand for logic analyzers to analyze signals, but the basic principle of logic analyzers is to use comparator-type circuits to convert digital signals into logic 0 and logic 1 signals. At this time, the level value required to set the comparator is the so-called threshold level, which is very important for the front-end circuit of the logic analyzer to obtain the logic signal. Once the threshol...

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Problems solved by technology

[0007] Although the aforementioned threshold level setting method can solve the requirement of setting the threshold level, however, the aforementioned situations all have common disadvantages, and all of them will cause the logic analyzer to fail to measure, for example:

[0008] (1) Due to the current digital circuit design, the digital signals to be measured on the same circuit board often do not use only one working level. Therefore, it is easy to fail to confirm all working levels or measure a certain working level less Level

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