Design of a high speed data acquisition system for biological mass spectrometers

VernacularTitle:生物质谱仪高速数据采集系统设计
Author: Hui WANG ; Xiaohui LIANG ; Chuanwei HUANG
Keywords: biological mass spectrometer; high speed data acquisition system; FPGA; ADC
From:Military Medical Sciences 2017;41(6):510-515
CountryChina
Language:Chinese
Abstract: Objective To develop a high-speed data acquisition system with sampling frequency of 2 GHz to meet the requirement of accurate measurement of flight time.Methods The ALTERA STRATIX Ⅲ series FPGA was used as the main control chip, matching with high-performance ADC chip with sampling frequency up to 2 GHz and sampling accuracy up to 12 bit, while extending 512 MB DDR3 SDRAM for data cache and exchanging data with the host computer through Gigabit Ethernet.In addition, a variety of PCB wiring methods were used to effectively ensure the signal integrity.Results The 250 MHz sine signal was input into the data acquisition board with 2 GHz sampling frequency,by analyzing and calculating the sampling data,acquired the following performance index of SNR=44.6639 and ENOB=7.1.Conclusion This high-speed data acquisition system based on ADC technology is a fast and reliable path and method for the measurement and analysis of biological mass spectrometry data.