• Depending upon the input signals applied to the input terminals of basic differential amplifier circuit.

• How the output response can be taken from the basic differential amplifier circuit.

• If the signal is given to only one input terminal and the other terminal is grounded,then it is called single input(or)single ended input.

• If the signal is given to both the input terminals,then it is called dual input.

• If the output is taken between two collector terminals,it is called as balanced output(or) double ended output.

• If the output is taken between one collector terminal with respect to ground,it is called as unbalanced output(or)single ended output.

Types/Configurations of Differential Amplifier

The differential amplifier can be used in Four configurations.

(A)Dual input Balanced output Differential Amplifier

(B)Dual input Unbalanced output Differential Amplifier

(C)Single input Balanced output Differential Amplifier

(D)Single input Unbalanced output Differential Amplifier