Lee Boysel

Lee Boysel
Lee Boysel
Born	December 31, 1938
Died	April 25, 2021 (aged 82)
Education	MSEE 1963; BSEE 1962
Alma mater	University of Michigan
Occupation(s)	Entrepreneur; Business executive; Electrical engineer; Investor
Known for	Founder of Four-Phase Systems, Inc.
Awards	University of Michigan Electrical & Computer Engineering Merit Award (2007)

Lee Boysel (December 31, 1938 – April 25, 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 Four-Phase Systems AL1.^[3] He founded Four-Phase Systems to commercialize the technology, and sold the company to Motorola in 1981.

He was a graduate of the University of Michigan.

Litigation

Texas Instruments claimed to have patented the microprocessor and, in response, Boysel 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

^ "Lee Boysel: In Memoriam (12/31/1938 – 4/25/2021)". Electrical and Computer Engineering, University of Michigan. May 24, 2021.
^ "1971: MICROPROCESSOR INTEGRATES CPU FUNCTION ONTO A SINGLE CHIP". Computer History Museum.
^ "Microprocessor Stories: Four-Phase Systems AL1". 2011 – via Computer History Museum.
^ Boysel, Lee (April 3, 1995). "Court room demonstration system 1969 AL1 microprocessor" (PDF) – via Computer History Museum.

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[1] "Lee Boysel: In Memoriam (12/31/1938 – 4/25/2021)". Electrical and Computer Engineering, University of Michigan. May 24, 2021.

[2] "1971: MICROPROCESSOR INTEGRATES CPU FUNCTION ONTO A SINGLE CHIP". Computer History Museum.

[3] "Microprocessor Stories: Four-Phase Systems AL1". 2011 – via Computer History Museum.

[4] Boysel, Lee (April 3, 1995). "Court room demonstration system 1969 AL1 microprocessor" (PDF) – via Computer History Museum.

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Lee Boysel
Born	(1938-12-31)December 31, 1938
Died	April 25, 2021(2021-04-25) (aged 82)
Education	MSEE 1963 BSEE 1962
Alma mater	University of Michigan
Occupation(s)	Entrepreneur Business executive Electrical engineer Investor
Known for	Founder of Four-Phase Systems, Inc.
Awards	University of Michigan Electrical & Computer Engineering Merit Award (2007)