Why is preamplifier used?(a) For Amplification(b) For Stabilizing effect(c) For Reducing effect(d) For Modifying effectsThe question was asked in an interview for internship.This interesting question is from System Concepts in division Patient Monitoring System of Biomedical Instrumentation

Why is preamplifier used?(a) For Amplification(b) For Stabilizing effe

1.	Why is preamplifier used?(a) For Amplification(b) For Stabilizing effect(c) For Reducing effect(d) For Modifying effectsThe question was asked in an interview for internship.This interesting question is from System Concepts in division Patient Monitoring System of Biomedical Instrumentation
Answer» Correct choice is (b) For Stabilizing effect Easiest explanation: The preamplifier is usually a three or four stage DIFFERENTIAL AMPLIFIER having a sufficiently LARGE negative CURRENT FEEDBACK, from the end stage to the first stage, which gives a stabilizing effect.

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