Question

Why are we worried about β during the Collector feedback configuration?

(a) To maintain a stable q-point irrespective of β

(b) To increase the gain

(c) To decrease the output impedance

(d) To maintain a stable input impedance

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The above asked question is from Collector Feedback Configuration topic in section Transistor Biasing and Low Frequencies of Analog Circuits

Answer 1

The correct option is (a) To maintain a stable q-point irrespective of β

Explanation: If we change the device, β changes. But we want to keep the q-point stable so that circuit if represented as a black box, would provide the same characteristics and not be highly dependent on the transistor. Hence, we want to make the circuit insensitive to β.