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偏流极小、噪声低、FET 作输入的运算放大器芯片用来处理几个 pA的电流已不成问题。而且,它的失调电压漂移比得上最好的双极型器件。
Very small bias current, low noise, FET input for the op amp chip used to deal with a few pA current is not a problem. And, its offset voltage drift is comparable to the best bipolar devices.