Lee Boysel

Lee Boysel (31. December 1938 – 25. April 2021[1]) was an American electrical engineer and entrepreneur. While at Fairchild Semiconductor, he developed four-phase logic and built the first integrated circuit with over 100 logic gates, and designed the Fairchild 3800 / 3804 8-bit ALUs.[2] Boysel designed the first microprocessor used in a commercial product, the Four-Phase Systems AL1.[3] He founded Four-Phase Systems to commercialize the technology, and sold the company to Motorola in 1981. Boysel is a graduate of the University of Michigan.

Lee Boysel
Born(1938-12-31)December 31, 1938
DiedApril 25, 2021(2021-04-25) (aged 82)
EducationMSEE 1963
BSEE 1962
Alma materUniversity of Michigan
OccupationEntrepreneur
Business Executive
Electrical Engineer
Investor
Known forFounder of Four-Phase Systems, Inc.
AwardsUniversity of Michigan Electrical & Computer Engineering Merit Award (2007)

Patent litigation with Texas Instrument

Texas Instruments claimed to have patented the microprocessor, and Lee Boysel in response assembled a system in which a single 8-bit AL1 was used as part of a courtroom demonstration computer system, together with ROM, RAM and an input-output device.[4]

References
  1. "Lee Boysel: In Memoriam (12/31/1938 – 4/25/2021)".
  2. "1971: MICROPROCESSOR INTEGRATES CPU FUNCTION ONTO A SINGLE CHIP". Computer History Museum.
  3. "Microprocessor Stories: Four-Phase Systems AL1". Computer History Museum. 2011.
  4. "Catalog Search | Computer History Museum" (PDF).


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