What I’d stumbled upon was a chopper amplifier, a slightly ungainly and long superseded solution to the problem of DC amplification from the days before ubiquitous integrated circuit op-amps.

the first linear IC Operational Amplifier. Combining his engineering genius, understanding of economic aspects of circuit design and awareness of medium and process limitations, he and Dave ...

ESA’s microwave engineer, David Cuadrado-Calle, stated that the integrated circuit is a low-noise amplifier, measuring just 1.8 by 0.9 mm across. David stressed that the low noise amplifier’s ...