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场效应对管和双运放可以组成既简单、又精确的模拟除法器。这个电路利用了场效应管在原点附近的线性转移特性、场效应对管几乎完全相同的特点以及反相运算放大器输入的虚地特性。这个电路(见图)的直流精度在满刻度的±0.5％以内,频响应可达数百千赫。因为两个输入湍输入的是电流信号。这电路是一个理想的光电探测器。(用电阻容易把输入变换成电压信号)输出端能输出一个满刻度大约为100mV的电度。输出电压也可以更大一些,但精度要降低。
The FET and the dual op amps make up an easy and accurate analog divider. This circuit makes use of the linear transfer characteristic of the FET near the origin, the almost identical FET effect, and the virtual ground characteristic of the inverting op amp input. The dc accuracy of this circuit (see picture) is within ± 0.5% of full scale and the frequency response can reach hundreds of kilohertz. Because the two input turbulence input current signal. This circuit is an ideal photodetector. (With resistance it is easy to convert the input to a voltage signal.) The output can output a full scale of about 100mV. The output voltage can also be larger, but the accuracy to be reduced.