Differential amplifiers are used in myriad applications, including microphones, simulation, analog-to-digital conversion and automatic gain control. See op amp. THIS DEFINITION IS FOR PERSONAL USE ...

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Inside such a probe you’ll usually find a fancy op-amp working as a differential amplifier, and for correct operation they require careful adjustment to null out DC bias and achieve the maximum ...

Inside was a simple servo, with a differential amplifier comparing the feedback via a potentiometer from the mechanism with the amplified input. The recorders dated from the early 1960s ...