Unit-I (Feedback amplifiers)Feedback Topologies
Presentation by:
S.Karthie, Lecturer/ECE
SSN College of Engineering
Feedback Topologies
• series-shunt feedback
• series-series feedback
• shunt-shunt feedback
• shunt-series feedback
Mixer network: Voltage ���� series Current ���� shunt
Sampling
Feedback Topology
At input side
Mixing
Sampling network : Voltage ����shunt Current ���� Series
Feedback Topology
Sampling
At output side
series
series
shuntvoltage
current
voltage
voltage
shunt
Identification of feedback topologies
voltage
shunt
series
current
series
voltage
Identification of feedback topologies
shunt
current
Shunt series
Identification of feedback topologies
Series- shunt
Identification of feedback topologies
Kinds of Basic Amplifiers & its feedback type
� Voltage Amplifier
� Current Amplifier
� Transconductance
Amplifier
� Transresistance
Amplifier
� Series-Shunt Feedback
� Shunt-Series Feedback
� Series - Series Feedback
� Shunt – Shunt Feedback
voltage-mixing voltage-sampling (series–shunt) topology
current-mixing current-sampling (shunt–series) topology
voltage-mixing current-sampling (series–series) topology
current-mixing voltage-sampling (shunt–shunt) topology