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Feedback Systems Fundamentals - Coggle Diagram
Feedback Systems Fundamentals
Types of Feedback
Negative feedback
Stabilizes system performance
Reduces distortion and improves linearity
Positive feedback
Increases gain
Can lead to instability and oscillations
Feedback Topologies
Voltage feedback
High input resistance
Stabilizes voltage output
Current feedback
Low input resistance
Stabilizes current output
Stability and Performance
Open-loop gain
Defines amplifier performance without feedback
Affects feedback efficiency and system behavior
Closed-loop gain
Affects stability and ensures predictable output
Controlled by the feedback network
Op-Amp Nonidealities
Finite gain
Limits system precision
Alters feedback accuracy
Input bias current
Creates offset voltage
Affects input impedance and signal accuracy
Impact on Circuit Performance
Gain deviation
Alters expected performance
Reduces circuit accuracy
Effect on feedback network
Distorts ideal behavior
Affects stability and feedback effectiveness
Series and Shunt Feedback
Shunt feedback
Current feedback with low input impedance
Stabilizes current and output voltage
Series feedback
Voltage feedback with high input impedance
Stabilizes output voltage and enhances gain
Voltage Amplifiers
Low output resistance
Ensures optimal power transfer
Reduces losses during signal transmission
High input resistance
Minimizes loading effects
Ideal for high-impedance sources