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What is the total voltage gain of a difference amplifier if the gain of first stage is 10dB, gain of the second stage is 20dB and gain of third stage is 30dB?

Correct Answer: 60dB
The total gain of a difference amplifier is the sum of the multiple stages when the gain is calculated is decibels. Given, AV1 = 10dB, AV2 = 20dB and AV3 = 30dB AV = AV1 + AV2 + AV3 = 10dB + 20dB + 30dB = 60dB

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