With the exist of FPGA chip EP1K30TC144-3, several hardware functions are realized in the chip, such as sample controlling logic, FIFO inside, the connection circuit with PC, the connection circuit with MPU, the connection circuit with keyboard.

• 系统采用了FPGA芯片EP1K30TC144-3，并且在芯片内集成了采样控制逻辑，内置HFO，上位机接口，单片机接口以及键盘接口等多个功能模块，使得数据采集卡的结构大大简化。