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The overall gain of a multistate amplifier is 100. When negative feedback is applied, the gain reduces to 10. Find the fraction of the output that is feedback to the input. |
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Answer» SOLUTION :We KNOW that `A_(f)=(A)/(1+Abeta)` Here, `A_(f)=10 and A=100` `therefore 10=(100)/(1+100beta) or 10+1000beta=100` `BETA=(100-10)/(1000)=(90)/(1000)=(9)/(100)=0.09` |
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