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Effect of Current-Series Feedback Amplifier in Output impedance

Table: Input and output impedances of feedback amplifiers
 
Impedance Types of feedback amplifier
  Voltage Series Current Series Voltage Shunt Current Shunt
Input impedance Zif Increased Zi(1+ßA) Increased
Zi(1+ßA) 
Decreased Decreased
Output impedance Zof Decreased

 
Increased
Z0(1+ßA)

 
Decreased

 
Increased
Z0(1+ßA)

 
 




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