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In the following diagram, shaded portions are named A and B. What are A and B?

In the following diagram, shaded portions are named A and B. What are A and B? Correct Answer A = Shunt mixing network, B = Current sampling network

When feedback network is in shunt with load, then output voltage appears as input to feedback. In above case, output current appears as the feedback input, hence B is a current sampling network. Also, feedback network is in shunt with the signal source, hence it’s called shunt mixing or current mixing.

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