一个光电二极管加上两个运放和一个比较器有助于构成数据传 输速率能达到800kb/s的光纤接收器(图1)。小的封装(运放为SOT23-5;比较器为μMAX-8)使得在印制板或混合衬底上所需占用的空间最小。 光电二极管工作在光电导模式,在IC1产生-信号电压,其互阻抗增益等于 R1的值(在本例中为 4.7kΩ)。运放 A photodiode plus two op amps and a comparator help form a fiber-optic receiver with a data rate of 800kb / s (Figure 1). The small package (SOT23-5 for op amps and μMAX-8 comparators) minimizes the space required on printed boards or hybrid substrates. The photodiode operates in photoconductive mode, generating a signal voltage at IC1 whose mutual impedance gain equals the value of R1 (4.7kΩ in this example). Op amp