FPGA-based programmable nanosecond level timing precision pulse generator

Abstract

The invention provides an FPGA-based programmable nanosecond level timing precision pulse generator comprising an FPGA, and an upper computer, a crystal oscillator circuit, a pulse amplitude control circuit and a pulse edge conditioning circuit, which are connected to the periphery of the FPGA, wherein the FPGA comprises a serial port control module, an instruction parsing module, a timing and pulse string generation module, a clock control module, an SPI control module and an OSERDES control module. The FPGA-based programmable nanosecond level timing precision pulse generator provided by theinvention uses a piece of FPGA and a small number of peripheral circuits to realize a multichannel pulse signal with nanosecond level timing precision, and realizes a universal asynchronous transmitting and receiving transmission serial port protocol in the FPGA, so that the pulse generator has a programmable control function, the pulse period, the pulse width and the pulse delay can all be controlled by serial port programming, and the programmable pulse amplitude is achieved in combination with a pulse amplitude control circuit. The FPGA-based programmable nanosecond level timing precision pulse generator provided by the invention is small in circuit size and simple in structure, can work independently, and can also be integrated into other systems as a modular circuit.

Description

technical field [0001] The invention belongs to the field of electronic technology and relates to a pulse generator, specifically a programmable multi-channel nanosecond-level high-precision pulse generator capable of outputting multi-channel pulse amplitudes, pulse periods, pulse widths and pulse delays. Programmable pulse signal, the adjustment accuracy of period, pulse width and delay can reach 1ns. It can be used as a pulse signal source in the fields of signal acquisition and signal measurement. Background technique [0002] High-precision pulse generation technology has a very wide range of application requirements in signal measurement, signal generation, excitation signal generation and other application fields. In the field of some high-speed signal measurement such as optical pulse signal measurement, it is necessary to use high-precision pulse signal as the sampling trigger signal to precisely control the sampling time and sampling length of the ADC chip. Especi...

AI Technical Summary

Problems solved by technology

High-precision timing control is the key to pulse generation circuits. Most existing solutions use MCU or FPGA to implement counters to control pulse time. The pulse time accuracy is limited by the clock frequency of the counter, and it is difficult to achieve nanosecond-level timing accuracy.

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