Lee Boysel Explained

Lee Boysel
Birth Date:	December 31, 1938
Education:	MSEE 1963 BSEE 1962
Alma Mater:	University of Michigan
Occupation:	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]

Notes and References

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