A Waveform Search Method for Digital Oscilloscope

Abstract

The invention discloses a waveform search method of a digital oscilloscope. In a hardware cooperative processing device, the analog signal passing through the signal conditioning circuit and the signal shaping circuit of the digital oscilloscope is converted into one or two digital channels according to the relevant waveform parameters set by the user. signal, the digital signal enters the waveform search module selected by the user. The waveform search module continuously detects that the input digital signal flow meets the logic level of the parameter set by the user under the system clock of the FPGA, and stores the start time Ts of the logic level into the waveform search data memory. The microprocessor reads the time data from the memory, and then calculates the corresponding position of the marking point on the screen according to the time base gear of the current digital oscilloscope.

Description

technical field [0001] The invention belongs to the technical field of waveform search, and more specifically relates to a waveform search method of a digital oscilloscope. Background technique [0002] Oscilloscopes are widely used in various industries as the most common testing instruments, and an oscilloscope with rich functions can be favored by more users. With the rapid development of electronic technology and semiconductor technology, electronic circuit systems are becoming more and more complex, and the amount of data transmission is also increasing. Capturing the waveform features that users are interested in by adjusting the trigger type of the oscilloscope can no longer meet the needs. Quickly searching all the waveform features that users care about from massive data can meet the testing requirements of today's complex electronic circuit systems. [0003] Due to the relatively short research time in the domestic oscilloscope industry, the architecture of "field...

AI Technical Summary

Problems solved by technology

[0006] (2) Reduce the waveform capture rate

This process of successive comparisons wastes a lot of oscilloscope processing time and prolongs the dead time D of waveform acquisition. As can be seen from the above formula, it also reduces the waveform capture rate.

[0010] (3) Small scope

The storage capacity of the display buffer area is small, only a few hundred sampling points, and the number of waveforms of interest to the user is small, or the waveform features of interest to the user cannot be searched at all, but the waveform features of interest to the user exist

At the same time, the waveform features in the massive waveform database in the oscilloscope cannot be searched, which also greatly reduces the efficiency of the oscilloscope

Images