Operational amplifiers are DC-coupled high-gain electronic voltage amplifiers with differential inputs and a single-ended output. Operational amplifiers or op-amps are widely used in electronic circuits because their gain is not dependent on temperature changes and manufacturing variations. Choose from op-amps for audio applications, CMOS op-amps, FET operational amplifiers, instrumentation op-amps, high power op-amps and dual operational transconductance amplifiers.