Differential amplifier

1. What does a differential amplifier do?
2. What is differential amplifier and its types?
3. What is the main advantage of differential amplifier?
4. Why Opamp is called differential amplifier?

What does a differential amplifier do?

Differential amplifiers are used mainly to suppress noise. Noise consists of typical differential noise and common-mode noise, of which the latter can easily be suppressed with an op-amp.

What is differential amplifier and its types?

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. It is an analog circuit with two inputs and and one output.

What is the main advantage of differential amplifier?

Advantage of differential amplifier: Differential amplifiers provide increase noise immunity: When using differential amplifiers, it responds to the only difference signal between input terminals and also ignores all common-mode signals such as noise pick–up and the ground voltage.

Why Opamp is called differential amplifier?

An op-amp is a differential amplifier which has a high i/p impedance, high differential-mode gain, and low o/p impedance. When the negative feedback is applied to this circuit, expected and stable gain can be built. Usually, some types of differential amplifier comprise various simpler differential amplifiers.