A Waveform Search Method for Digital Oscilloscope

A technology of a digital oscilloscope and a search method, applied in the field of waveform search, can solve the problems of small scope, inability to search for waveform features, waste of oscilloscope processing time, etc., to save the search time and increase the waveform search range.

Inactive Publication Date: 2017-10-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A Waveform Search Method for Digital Oscilloscope
  • A Waveform Search Method for Digital Oscilloscope
  • A Waveform Search Method for Digital Oscilloscope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] figure 1 It is a structure diagram of a specific embodiment of a waveform search method of a digital oscilloscope in the present invention.

[0052] In this example, if figure 1 As shown, the waveform search is completed by a hardware co-processing device, which is realized by a signal shaping circuit and FPGA (Field Programmable Logic Gate Array). Combine below figure 1 , the waveform search method of a kind of digital oscilloscope of the present invention is described in detail, and it comprises the following steps:

[0053] (S1), initialize the hardware co-processing device

[0054] (S1.1), initialize the signal shaping circuit

[0055] Set the multiplexer A in the signal shaping circuit to select channel 1 as the input channel of the shaping circuit; assume that the input signal collected by the digital oscilloscope acquisition system is x(t), and its amplitude value is V, and the comparator H is set according to the amplitude value V The threshold level of L i...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/0484
Inventor 曾浩许波黄武煌杨扩军邱渡裕蒋俊潘卉青
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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