_______________ will reject any common mode signal that appears simultaneously at both amplifier input terminal.(a) ac coupled amplifiers(b) dc amplifiers(c) carrier amplifiers(d) differential amplifiersI had been asked this question in an online quiz.This is a very interesting question from Telemedicine System in portion Telemedicine Technology of Biomedical Instrumentation

_______________ will reject any common mode signal that appears simult

1.	_______________ will reject any common mode signal that appears simultaneously at both amplifier input terminal.(a) ac coupled amplifiers(b) dc amplifiers(c) carrier amplifiers(d) differential amplifiersI had been asked this question in an online quiz.This is a very interesting question from Telemedicine System in portion Telemedicine Technology of Biomedical Instrumentation
Answer» Right answer is (d) differential amplifiers Easiest explanation: Most of the amplifiers used for measuring BIOELECTRIC signals are of the differential type. A differential amplifier is one which will REJECT any common mode signal that appears simultaneously at both amplifier INPUT terminals and amplifies only the voltage difference that appears ACROSS its input terminals. AC amplifiers have a limited frequency response and are, therefore, used only for special medical applications such as electrocardiograph machine.

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