Question

From the options given below select the one which is not a type of isolation amplifier?

(a) transformer type isolation amplifiers

(b) resistive coupled isolation amplifiers

(c) optically isolated isolation amplifiers

(d) capactively coupled isolation amplifiers

This question was addressed to me in examination.

This interesting question is from Single Channel Telemetry System in portion Biomedical Telemetry of Biomedical Instrumentation

Answer 1

Correct choice is (b) resistive coupled isolation amplifiers

The best I can explain: Opto-coupled amplifier uses a minimum number of components and is cost effective, followed by the transformer coupled amplifier. The capacitor coupled amplifier is the most expensive. There is nothing such as the resistive coupled isolation amplifiers. All the other three types are in common use, though the transformer isolation amplifier is more popular.