积分 器、光电二极管放大器和高阻抗传感器等器件均可受益于这些特性。
Filters, integrators, photo-diode amplifiers and high impedance sensors all benefit from the combination of performance features.
R2和R4用来降低因输入失调电流产生的误差，其原理与前文光电二极管放大器所述一致。
R2 and R4 are chosen to minimize errors due to input offset current as outlined in the section describing the photocell amplifier.
放大器输入为电压信号，与光敏二极管产生的光电流信号成比例。调制光柱以断路器同样的频率照射光敏二极管。
The amplifier input is a voltage proportional to the photocurrent signal produced by a photodiode, which is irradiated by a modulated light beam at the same chopper frequency.
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