The AD628 common-mode differential amplifier is said to be the first such device to provide programmable gain. Using an external resistor, the amplifier can be set for a gain range from 0.1 to 1,000.

Fully differential amplifiers have grown in popularity because of their low distortion, excellent noise rejection, and the simplicity of interfacing them with differential analog-to-digital converters ...

Broadband differential variable-gain IC amplifiers. The amplifiers are designed to operate at frequencies from DC to 10 GHz with a maximum gain of 27 dB. The amplifiers are used in medical ...