HOW TO IDENTIFY THE TYPE OF FEEDBACK IN OP-AMPS

Let the input terminal to which source is connected is considered as shunt     

The terminal connected to ground at the input is considered as series

The output terminal from which output is taken is considered as voltage

The other end of the load resistor is considered to be current

NOTE :

Naming the feedback is done from the output to input.

VOLTAGE-SERIES FEEDBACK OR SERIES-SHUNT FEEDBACK

STEP 1: identify the feedback resistor

STEP 2: The terminal connected to ground at the input is considered as series

STEP 3: The output terminal from which output is taken is considered as voltage

STEP 4: Name the feedback is considered from the output to input

As the feedback resistor is connected from output voltage ( VOLTAGE ) to input connected to ground (SERIES)

So,this circuit is called voltage series feedback

How to convert the name VOLTAGE- SERIES to SERIES-SHUNT FEEDBACK

Rename voltage as shunt and interchange the names as

VOLTAGE- SHUNT or SHUNT-SHUNT FEEDBACK

STEP 1: identify the feedback resistor

STEP 2: Let the input terminal to which source is connected is considered as shunt 
STEP 3: The output terminal from which output is taken is considered as voltage

STEP 4: Name the feedback is considered from the output to input

As the feedback resistor is connected from output voltage ( VOLTAGE ) to input (SHUNT)

So,this circuit is called voltage shunt feedback

How to convert the name VOLTAGE- SHUNT to SHUNT-SHUNT FEEDBACK

Rename voltage as shunt and interchange the names as

CURRENT-SERIES or SERIES-SERIES FEEDBACK

STEP 1: identify the feedback resistor

STEP 2: The terminal connected to ground at the input is considered as series

STEP 3: The other end of the load resistor is considered to be current

STEP 4: Name the feedback is considered from the output to input

As the feedback resistor is connected from other end of the load resistor ( CURRENT ) to input terminal connected to ground (SERIES)

So,this circuit is called current series feedback

How to convert the name CURRENT- SERIES to SERIES-SERIES

Rename current as series and interchange the names as

CURRENT- SHUNT or SHUNT-SERIES FEEDBACK

STEP 1: identify the feedback resistor

STEP 2: Let the input terminal to which source is connected is considered as shunt

STEP 3: The other end of the load resistor is considered to be current

STEP 4: Name the feedback is considered from the output to input

As the feedback resistor is connected from other end of the load resistor ( CURRENT ) to the input terminal to which source is connected ( SHUNT )

So, this circuit is called current shunt feedback

How to convert the name CURRENT- SHUNT to SHUNT-SERIES

Rename current as series and interchange the names as