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The overall gain of multiple amplifiers in cascade can be expressed as__________ (A1, A2, A3 are individual gains)

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The overall gain of multiple amplifiers in cascade can be expressed as__________ (A1, A2, A3 are individual gains)

(a) A1-A2-A3

(b) A1+A2+A3

(c) A1/A2*A3

(d) A1*A2*A3

This question was posed to me during an online exam.

Question is taken from Active and Passive Devices in division Diode Circuit of Analog Circuits

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Correct choice is (d) A1*A2*A3

Explanation: Gain can be voltage, current or power. Thus, when we put multiple stages in cascade the total gain will be the product of gains at individual stages. This is because the gain in successive stages increases greatly because of multiplication.

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