A data acquisition system, which can be applied in the LSA family of the Laser Particle Analyzer, was designed by using the Altera Cyclone II family of device and the IP core PCI_t32. The control logic of the system and the PCI interface was also designed in FPGA. This system can provide one 12bits data acquisition channels for 112 analog input by using AD7321, and the data transfer rate can reach to 3Mbps. By using this system, the experiment of the standard particle board meet the requirement of the ISO13...