Design of data acquisition system for portable two channels multi-channel nuclear spectrum analyzer

This data acquisition system is based on FPGA,instead of microcontroller,including peak hold circuit,high speed A/D convert circuit and USB interface circuit for the portable two channels multi-channel nuclear spectrum analyzer.The detail design of hardware and software is presented.The system has the advantage of high precision and fast transport etc.and it also gives a good reference for further design to realize more channels data acquisition.