## 30 Sept 2018

### Differential Amplifier (Differential Inputs, Common Mode Input, Common Mode Current Source (OP AMP)

This video is about structure and working of differential amplifier.
The working principle of different types of Differential amplifiers has been explained in this simulation video with the help of an online circuit simulator software.
Here you will find the structure and working of differential amplifier (differential input), differential amplifier (common mode input) and differential amplifier (common mode with current source) with the help of waveforms.
As clear by the name itself, a differential amplifier amplifies the difference between two input voltages.
Differential amplifier is a type of electronic amplifier (analog circuit) with two inputs and one output.
The output of the differential amplifier is ideally proportional to the difference between the two input voltages.
The differential amplifier suppresses any voltage that is common to the two inputs.
As the name implies, in common mode input, the input voltage applied to both inverting and noninverting inputs is common (same).
For example - noise is an example of common mode voltage as the noise acts equally on both the inputs of the differential amplifier.

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