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