论文部分内容阅读
腔衰荡光谱DSP处理系统中,衰荡信号的数字化需要用高速A/D来实现。目前,高速A/D芯片对输入信号的幅值范围有着严格的要求,为保证输入腔衰荡光谱DSP处理系统中A/D芯片的信号满足其要求,并实现其性能最优化,文章设计了一套以峰值探测器、可变增益放大器、高速运放及C8051单片机为核心器件的高速A/D芯片输入信号调理电路。实验结果表明:该电路满足设计要求,同时,该电路还可用于其它需要对电振幅进行调理的场合。
In the cavity ring-down spectroscopy DSP processing system, the digitization of the ringing signal needs to be realized by the high-speed A / D. At present, the high-speed A / D chip has strict requirements on the amplitude range of the input signal. In order to ensure that the signal of the A / D chip in the ring-decaying spectrum DSP processing system meets the requirements and the performance is optimized, the article designs A set of peak detector, variable gain amplifier, high-speed op amp and C8051 microcontroller core high-speed A / D chip input signal conditioning circuit. The experimental results show that the circuit meets the design requirements, meanwhile, the circuit can also be used in other occasions where the electrical amplitude needs to be adjusted.