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Q1: Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is

A 0 dB

B 8.30 dB

C –8.30 dB

D 0.8 dB

ANS:C - –8.30 dB

We know,

db = 20log Vout/Vin.

= 20 log (500m/1.3).
= 20 log 0.385.

= 20*(-0.415).
= -8.29.



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