What are the characteristics of feedback amplifier?

Feedback amplifiers share these properties: Pros: Can increase or decrease input impedance (depending on the type of feedback). Can increase or decrease output impedance (depending on type of feedback). Reduces distortion (increases linearity). Increases the bandwidth. Desensitizes gain to component variations. Can control step response of amplifier. Cons: May lead to instability if not designed carefully. Amplifier gain decreases. Input and output impedance of a negative feedback amplifier (closed-loop amplifier) become sensitive to the gain of an amplifier without feedback (open-loop amplifier)that exposes this impedance to variations in the open loop gain, for example, due to parameter variations or non-linearity of the open-loop gain.

0 Upvotes 0 Upvotes 0 Downvotes

• • Report Abuse
• Comment