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The operational amplifier, or "op-amp", is a common type of amplifier used everywhere in analog electronics. The op-amp has very high gain and differential inputs.

11640_Inverting_op_amp.html

11643_Summing_op_amp.html

11639_Feedback.html

11637_What_is_an_operational_amplifier_.html

11642_Virtual_ground_examples.html

11638_Non_inverting_op_amp.html

11641_Virtual_ground.html