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The overall gain of a multistage amplifier is 100. When negative feedback is applied, the gain reduces to v 10. Find the fraction of the output that is feedback to the M input. |
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Answer» Solution :We KNOW that `A_f = (A )/(1 + A BETA)` Here, `A_f= 10 and A= 100` ` therefore1= (100)/(1 +100 beta) or10 + 1000beta= 100` ` beta = (100-10)/( 1000) = (90)/( 1000 ) = (9)/(100) = 0.09` |
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