A Synchronous Sampling Control Circuit of Multiple Signals Based on FPGA

Abstract

The invention discloses an FPGA-based multi-channel signal synchronous sampling control circuit, which at least includes a multi-channel signal sampling interface circuit, a crystal oscillator circuit, an FPGA chip and a microprocessor; the FPGA chip at least includes a multi-channel signal sampling parallel processing module, a synchronous lock Storage module, output control module, address decoding module and synchronous latch signal generation module; the synchronous latch signal SYNL output by the synchronous latch signal generation module controls the synchronous latch module to sample multiple signals and process the multi-channel data output by the module in parallel The synchronous latch keeps the multi-channel data output by the multi-channel signal sampling parallel processing module unchanged at the same time, and ensures the synchronization between the data read by the microprocessor from the FPGA chip one by one. The invention is suitable for a control system requiring synchronous sampling of multi-channel signals, especially for a control system for synchronous sampling of multi-channel pulse signals or multi-channel digital signals, which is flexible, convenient and practical.

Description

technical field [0001] The invention relates to the technical field of signal acquisition and transmission, in particular to an FPGA-based multi-channel signal synchronous sampling control circuit. Background technique [0002] In modern control systems, signal acquisition systems have been widely used in electronic measurement, communication, radar, aerospace, industrial control and other fields. Signals can be classified into analog and digital signals. To collect the analog signal, it is necessary to use an analog-to-digital converter (ADC) for collection. In the prior art, a great deal of research has been done on synchronous sampling of multiple analog signals. Chinese Patent Document Nos. ZL200810240063.9, ZL201010577253.7, ZL201310087071.5, ZL200720311326.1, etc. are only inventions and designs on how to sample multiple analog signals synchronously, but digital pulse signals with some non-analog signals cannot be compared with analog signals. The ADC is used for sy...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of synchronous sampling of multi-channel non-analog signals, thereby proposing a multi-channel signal synchronous sampling control circuit based on FPGA

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