The operational amplifier is arguably the most useful single device in analog electronic circuitry. When you apply them in the circuits, you must know their basics and functions. As for the function ...

Zero input current. The input current to both inputs is zero. Zero output impedance. The output impedance is zero. Zero power dissipation. The ideal op-amp doesn t draw or dissipate any power.

Amplifier circuit offsets are always an important topic for any amplifier design. Most voltage amplifier circuit offsets are a result of the amplifier’s input voltage offset, input bias current and ...