Feedback Amplifiers and Stability
24 sections
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Sections
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What we have learnt
- Feedback in electronic systems can be positive or negative, greatly influencing the amplifier's behavior and stability.
- Negative feedback improves gain stability, reduces distortion, and enhances bandwidth, while positive feedback can lead to instability and oscillations if not controlled.
- Understanding feedback topologies is essential for effective amplifier design, catering to specific performance requirements.
Key Concepts
- -- Feedback
- The process of feeding portions of the output of a system back to the input to improve system stability and performance.
- -- Positive Feedback
- Feedback that reinforces the input signal, potentially leading to increased gain and instability.
- -- Negative Feedback
- Feedback that opposes the input signal, stabilizing gain and improving linearity and bandwidth.
- -- Stability
- The ability of an amplifier to settle to a steady state after a disturbance without oscillations.
- -- Gain Margin
- A measure of the system's tolerance to gain increases before becoming unstable, expressed in decibels.
- -- Phase Margin
- The additional phase shift that can be introduced before an amplifier becomes unstable, measured in degrees.
Additional Learning Materials
Supplementary resources to enhance your learning experience.