Compound configuration
Compound configuration
Coupling
Coupling
Cascode connection
Cascode connection
Darlington connection
Darlington connection
Feedback connection
Feedback connection
Coupling
Coupling
Direct coupling
Direct coupling
•IC
IC
Capacitor
Capacitor
•Discrete circuits
Discrete circuits
Transformer
Transformer
Capacitor coupling
Capacitor coupling
Signal from previous
Signal from previous
stage goes to the next
stage goes to the next
stage through a
stage through a
capacitor
capacitor
Advantages:
Advantages:
•DC separated between
DC separated between
stages
stages
•Large capacitance to
Large capacitance to
reduce distortion
reduce distortion
Disadvantages:
Disadvantages:
•Large size
Large size
•Affect low frequency
Affect low frequency
Use in discrete circuits
Use in discrete circuits
Direct coupling
Direct coupling
Signal from previous
Signal from previous
stage goes to the next
stage goes to the next
stage directly
stage directly
Advantages:
Advantages:
•No power loss
No power loss
•Not affect frequency
Not affect frequency
response
response
Disadvantage:
Disadvantage:
•Influence of DC bias
Influence of DC bias
between stages
between stages
Use in IC
Use in IC
Cascode connection
Cascode connection
CE and CB transistor
CE and CB transistor
connected directly
connected directly
CE stage with small
CE stage with small
negative gain =>
negative gain =>
small Miller
small Miller
capacitance
capacitance
Use in high frequency
Use in high frequency
amplifier
amplifier