Karl D. Swartzel Jr.
Karl D. Swartzel Jr. is the inventor of the operational amplifier (or 'op-amps'). He filed the patent for the 'summing amplifier' in 1941 when working at Bell Labs.
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Wikipedia
Karl D. Swartzel Jr. is the inventor of the operational amplifier (or 'op-amps'). He filed the patent for the 'summing amplifier' in 1941 when working at Bell Labs.