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The feedback topology in the amplifier circuit (the base bias circuit is not shown for simplicity) in the figure is

1. voltage shunt feedback
2. current series feedback
3. current shunt feedback
4. voltage series feedback

Correct answer: voltage series feedback

Solution

Voltage series feedback is used in this amplifier circuit because it takes a portion of the output voltage and feeds it back to the input in a series configuration, which helps stabilize the gain and improve linearity.

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