Philbrick K2-W

philbrickarchive.org

from www.PhilbrickArchive.org

The first commercial operational amplifier was the K2-W op-amp. It was based on the amplifier used in the Philbrick K3 modular Analog-Computor “black boxes”. That amplifier’s basic circuit architecture, in turn, was probably inspired by an earlier amplifier designed by Loebe Julie (this information is from Dan Sheingold and Bob Pease). The K2-W operational amplifier entered the commercial market in 1952, and was last manufactured in 1971

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