The analog part includes: Signal amplification circuit, differential input interface circuit, and reference voltage circuit. The digital part includes: analog-digital conversion, ADS1278 with FPGA interface circuit, DC-DC converter circuit.
模拟部分包括:信号放大电路、差分输入接口电路和参考电压电路;数字部分主要包括:模数转换器电路、ADS1278与FPGA接口电路和DC-DC转换电路。
参考来源 - 激光散射法干度传感器电路的设计和研究The amplitude of voltage signal has been adjusted by the simple amplification circuit. The output is the standard value 3.25/(?)
采用简单的放大电路，对低压臂输出的电压信号进行幅值调整，使之等于标准值3.25／3~(1／2)V。
参考来源 - 基于电阻分压原理的电子式电压互感器研究·2,447,543篇论文数据，部分数据来源于NoteExpress
We also developed a new low-noise photodiode signal amplification circuit to further improve sensitivity.
同时，已经研制了新的低躁声光电信号放大电路，将用于以后的灵敏度改进。
Signal channel consists of attenuating circuit, impedance transformation circuit and amplification circuit.
信号通道由衰减电路、阻抗变换电路、放大电路等电路组成。
Then the three key parts of electronic nose: sensors array, signal amplification circuit and AD board are also introduced.
介绍了本课题中采用的电子鼻硬件系统的三个组成部分――传感器阵列、信号调理电路和数据采集卡。
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