Mixed-signal oscilloscope with noise suppression function

Abstract

The invention provides a mixed-signal oscilloscope with a noise suppression function, comprising a digital sampling unit, a setting unit, and a bus decoding unit. The digital sampling unit is used for digitally processing and sampling multiple channels of measured signals on parallel digital buses to obtain multiple digital signal data. The setting unit is used for setting the noise suppression time. The bus decoding unit is used for judging whether the previous bus state is stable or not according to the duration time and noise suppression time of the previous bus state when detecting that the current bus state is changed according to the multiple digital signal data, recording the previous bus state as a stable state and outputting digital signal data of the stable state according to the duration time of the stable state if the previous bus state is stable, outputting digital signal data of the stable state according to the duration time of the previous bus state if the previous bus state is not stable, and displaying the output digital signal data in a specified format. An unstable state is eliminated as noise, so that the decoding result is consistent with actual information source data.

Description

technical field [0001] The invention relates to the technical field of test and measurement, in particular to a hybrid oscilloscope with noise suppression function. Background technique [0002] Mixed-signal oscilloscopes, also known as mixed-signal oscilloscopes (MSO, Mixed-signal Oscilloscopes), are an oscilloscope that can observe both analog and digital signals. It is used in system debugging where digital signals and analog signals coexist. The hybrid oscilloscope can observe the measured signals on multiple parallel digital buses at the same time. The parallel digital bus is equivalent to multiple digital channels, which usually include a clock line and multiple data lines. The clock line can be regarded as a clock channel for transmitting clock signals. Each data line is a data channel, and the measured signal in the data channel has only two states of "1" and "0", which is convenient for comparative analysis. [0003] The measured signal in the data channel should n...

AI Technical Summary

Problems solved by technology

[0008] In addition, the data changes of the measured signals in multiple data channels may not occur at the same time, even if the data changes of the original measured signals occur at the same time, due to the cable difference of the probe 103, the signal collected by the probe 103 Data changes may not be at the same moment

Images