Question

Preamplifier is used ________

(a) For Amplification

(b) For Stabilizing effect

(c) For Modifying effects

(d) For Reducing effect

The question was asked in an interview for internship.

My question comes from Biotelemetry Application on Wimax Networks topic in portion Biomedical Telemetry of Biomedical Instrumentation

Answer 1

The correct answer is (b) For Stabilizing effect

For 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.