what is difference between OP AMP and differential amplifier?

Answer Posted / deepika

Well, you can build a differential amplifier by using two op-amps.
From a practial point of view the difference is simply that a differential amplifier has TWO inputs and amplifies the DIFFERENCE between two signal; an op-amp configured as e.g. a standard non-inverting amplified will amplify a signal with respect to ground (i.e it is a single-ended amplifier).

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