Question

How many types of configuration are available for feedback amplifier?

(a) Six

(b) Four

(c) Two

(d) Eight

I had been asked this question during an interview for a job.

I'd like to ask this question from Block Diagram Representation of Feedback Configurations topic in division Operational Amplifier Characteristics of Linear Integrated Circuits

Answer 1

The correct answer is (b) Four.

In feedback amplifiers, there are four basic types of configurations based on how the feedback is applied. These are:

1. Voltage Series Feedback (Voltage Amplifier with Voltage Feedback)
2. Voltage Shunt Feedback (Current Amplifier with Voltage Feedback)
3. Current Series Feedback (Voltage Amplifier with Current Feedback)
4. Current Shunt Feedback (Current Amplifier with Current Feedback)

These configurations differ based on whether the feedback is applied to the voltage or current at the input and output stages. Each type has different applications depending on the desired characteristics of the amplifier.