A method for locating the trigger point position of high-speed parallel data stream

Abstract

The invention provides a method for locating the position of the trigger point of the high-speed parallel data flow, and the position of the trigger point can be directly used to realize the digital three-dimensional oscilloscope. Step 1. Simultaneously compare the parallel data and the lower limit and upper limit of the trigger band to obtain the two-way parallel comparison result; Step 2. Divide the LData into several groups, and first "OR" the first-level grouped data to determine whether the group There is a bit with a value of 1, and at the same time determine the position of the first bit with a value of 1; step 3, group the data obtained after the first-level grouping is bit-wise "OR", and use the method of step 2 to find the first The position of a bit with a value of 1, until the position of the first bit with a value of 1 in LData can be determined; step 4, after finding the first bit with a value of 1 in LData, generate the corresponding data Mask LDataMask; step 5, the data mask LDataMask and HData perform "AND" operation to obtain the data mask HDataMask; step 6, find the first value of 1 for the data mask HDataMask according to the method of step 2 and step 3 The position of the bit of is the position of the trigger point in the data stream.

Description

technical field [0001] The invention relates to the field of digital storage oscilloscope data sampling triggering, in particular to a method for locating the trigger point position of high-speed parallel data streams, which is used to improve the stability of waveform display. Background technique [0002] The high-speed digital oscilloscope quantifies and samples the analog signal through a high-speed analog-to-digital converter (ADC), sends the data to the field programmable logic gate array (FPGA) for processing, and stores it in the memory. When displaying, the data is read from the memory and sent to the The display shows. With the continuous development of electronic technology, the sampling rate of the oscilloscope is required to reach several GHz to tens of GHz, but FPGA is far from reaching such a high processing speed, so the sampled data needs to be processed in parallel. Multiple parallel data streams bring challenges to high-speed data acquisition trigger syst...

AI Technical Summary

Problems solved by technology

Although this method simplifies the trigger channel circuit, it still requires an additional voltage comparison circuit, and does not simplify the complex synchronization processing logic, and there are still errors

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