For the input resistance calculation, convince yourself that TOC = 0 when the input is open circuited.

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For the input resistance calculation, convince yourself that TOC = 0 when the input is open circuited.

Expert Solution
Step 1

Blackman’s theorem is basically used to calculate the resistance in a negative feedback amplifier of an arbitrary pair of elements.

Rx=RxD1+TSC1+TOC

Here according to the equation

RxD : The resistance possessing the feedback disabled

TSC : Is the loop transmission( short small signal) along the selected terminal pairs

TOC : Is the loop transmission (open circuit) along the selected terminal pairs

 

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