An amplifier with an open loop gain (Av) of 100,000 has 3% negative feedback applied. Calculate the closed loop gain.



Av = 100,000 = 1 x 105
 = 3% = 0.03
Using the full equation
Anfb = Av
1 + (Av)
= 1 x 10
1 + (0.03 x 105
)
= 1 x 105
3001
= 33.3
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