There were analog multiplexers, A/D conversion(analog digital conversion), FIFO module, CPLD module in the hardware design and CPLD program, USB firmware, USB driver in the software design.
在硬件上包含多路开关、模数转换、FIFO模块、CPLD模块、USB模块； 在软件上包含CPLD编程、USB固件、USB驱动以及应用程序。
The 14-bit, four-channel A/D converter MAX1325 is employed to sample the analog input and output voltage of the synchro and then converted them into digital.
模数转换采用了14位，四通道A／D转换器MAX1325，实现了自整角机四路模拟数据的同时、快速采样。
Since the signal which is disposed by the SCM usually is the Digital Signals, before the Analog signals are checked by the processor, they must be conversed by the A/D converter.
由于单片机所处理的信号是数字信号，对模拟电压信号进行检测处理时首先要用A／D 转换器件对其进行A／D转换，然后再进行处理。
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