By changing the amplification multiple through DAC signals, the measurement range of the system is improved.

用DAC芯片程控信号调理电路的放大倍数，提高了系统的测量范围。

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Because of the requirements for improving the speed and precision of signal process, so the DAC has to have higher speed and precision, so DAC has become the bottleneck of the system design.

由于系统不断提高的处理速度和精度要求，使得数模转换器必须实现更快的转换速度和更高的转换精度，成为系统设计的瓶颈。

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Abstrat: This system is composed by FPGA, MCU controller, keyboard, LCD, DAC and amplifier modules.

本系统由FPGA、单片机控制模块、键盘、LCD液晶显示屏、DAC输出电路和末级放大电路构成。

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