Question

What are the four differential amplifier configurations Which one is not commonly used and why

Answer 1

Answer:

A differential amplifier is a type of electronic amplifier that amplifies the difference between two input voltages but suppresses any voltage common to the two inputs.

Answer 2

Answer:

There are four kinds of configurations in this amplifier. They exist:

• Dual input balanced output.
• Dual input unbalanced output.
• Single input balanced output.
• Single input unbalanced output.

Explanation:

The most common amplifier configuration for an NPN transistor exists that of the Common Emitter Amplifier circuit. Transistor amplifiers amplify an AC input signal that alternates between some positive value and a corresponding negative value.

The way differential amplifier exists configured is dependent on the inputs applied and the outputs obtained. There are four kinds of configurations in this amplifier. They exist:

• Dual input balanced output.
• Dual input unbalanced output.
• Single input balanced output.
• Single input unbalanced output.

As the two transistors exist interconnected to form the differential amplifier if it is supplied with the inputs on both the transistors it stands termed as the dual input amplifier. If there is a single supply furnished then it exists known as a single input amplifier.

the output value of the voltage if it is organized in between the two collectors of the transistors concerning its connection to the ground is directed to as balanced output. The collection of the output from a single collector is understood as unbalanced output.

These are the configurations of the differential amplifier based on the input voltages that maintain to be applied and how the output is collected. A multiple-stage amplifier that is developed with this type of differential amplifier is connected in the form so that the needed gain is obtained. As the coupling utilized here exists a direct one it can remove the cut-off frequencies and create it compatible with the amplification of both the AC and the DC signals.

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