基于FPGA的AD信号采集自适应系统的设计与实现

Implementation and Design of AD Signal Acquisition Adaptive System Based on FPGA

为了满足对探测器模拟信号采集的高精度、低延迟、零相移的要求,设计了一种基于FPGA的AD信号采集自适应系统。结合工程实际应用,给出了AD信号采集的时序图及设计流程图,在基于XILINX公司的Zynq-7000系列的器件上,由FPGA逻辑实现对AD9653芯片的控制,确保每一路的模拟信号,经AD转换后数字信号到FPGA的整个通路不因PCB布局布线的差异而有所不同,每一路通道上的信号经FPGA内的硬件逻辑资源SelectIO后可自适应,保证了数据采集的准确性。

To meet the requirements of high precision,low delay and zero phase shift for detector analog signal acquisition,a field programmable gate array(FPGA)-based analogue digital(AD)signal acquisition adaptive system is designed.Incorporating with engineering application,the timing diagram and design flow chart of AD signal acquisition are given.The control of AD9653 chip is realized by FPGA logic based on the Zynq-7000 series devices from XILINX Company・FPGA logic is used to realize the control of AD9653 chip,which can ensure that analog signal on each channel,the digital signal after AD conversion to the entire pathway of FPGA are not vary with the difference of the printed circuit board(PCB)layout and wiring.The signal on each channel can adapt after passing to the Select IO hardware logic resources in FPGA and ensure the accuracy of data acquisition.