Question

A 3 stage amplifier has first stage voltage gain 50 second stage voltage gain 75 thrid stage voltage gain is 100.find total gain in db?

Answer 1

Answer:

111.48dB...

Explanation:

A1=50

A2=75

A3=100

A Total=A1*A2*A3

=== 50*75*100

=== 375000

Gain In dB =20 logA

=20 log(375*10^3)

=== 20 (3+log(375))

log(375)=2.574

===20(3+2.574)

== 20(5.574)

=== 111.48 dB...