If the input to an amplifier is 0.4 volt and the output is 50 volts, find the
decibel voltage gain of the amplifier.
Solution:
EO
dB gain = 20 log
EI
50
dB gain = 20 log
0.4
dB gain = 20 log 125
dB gain = 42
The amplifier provides a 42-decibel voltage gain.
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