James L. Buie

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James L. Buie
James L.Buie Black and White Potrait Photo.jpg
Buie, c. 1964
Born 1920
Hollywood, California
Nationality  United States
Citizenship  United States
Alma mater University of Southern California
Known for TRW Inc.
transistor-to-transistor logic (TTL)
transistor-coupled transistor logic (TCTL)
Awards The United States Distinguished Flying Cross
Scientific career
Fields Electrical Engineering
Institutions TRW Inc.
Pacific Semiconductors (PSI)
Ramo-Woolridge Corporation

James L. Buie (1920 – September 25, 1988) was an American scientist and inventor who worked for TRW Inc. He refined and developed electronic circuitry to the integrated circuit level, this led to the beginning of the integrated circuit industry.[1]

Early life[edit]

Buie was born in 1920 in Hollywood, California,[2] he served in World War II as an airplane pilot and became a lieutenant commander during his service.[2]


TRW research building "R1" in 1967 where Buie did some of his research.

Buie was an electrical engineering graduate of University of Southern California receiving a BSEE in 1950.[3] Buie's first job was at Pacific Semiconductors (PSI) in Culver City, California in 1951, he worked on transistor circuitry as related to diodes and resistors.[4] He was next employed by Ramo-Woolridge Corporation in 1954.[2] Ramo-Woolridge joined with Thompson Automotive Group in 1958 and eventually Thompson-Ramo-Woolridge became known as TRW Inc. Buie was a senior scientist and one of the organizers for TRW's Microelectronics Center that formed in 1963.[5] He headed TRW's large scale integration LSI Products Division in 1977.[2]

Buie invented transistor-to-transistor logic circuitry ("TTL") in 1961 leading to the development of the integrated circuit industry.[1][2][6][7][8][9][10] Buie's technology technique was originally known as transistor-coupled transistor logic – TCTL,[11] the TTL electronics invented by Buie became the electronics industry standard for two decades.[12] The first commercial integrated circuit products using the TTL technology were made by Sylvania in 1963 and known as the Sylvania Universal High-Level Logic family.[13][14]

Texas Instruments introduced integrated circuits for military applications in 1964. Buie's technology pioneered the development of microelectronics for man-made satellites used in space for the aerospace industry,[15] the integrated circuit technology was used extensively in the 1970s and 1980s in computers, communications, and military equipment.[15] TRW licensed the new technology to other companies to use in data processing and communications electronics, the TTL integrated circuit technology is still used in the electronics industry today.[1]

Innovations and inventions[edit]

Buie "TTL" transistor technology patent US3283170A electronic diagram

His innovations in microelectronics included dielectrically isolated integrated circuits, single-chip parallel multipliers, single-chip analog-to-digital converters, and triple-diffused bipolar devices,[2] some of his inventions are as follows:

Other patents of Buie are "Bipolar transistor construction method" (# 3981072 of 12/6/1974) and "Read-only memory construction and related method" (#4546456 of 6/8/1983).[16]


Buie was elected a fellow of the Institute of Electrical and Electronics Engineers in 1973.[1]


Buie was awarded the United States Distinguished Flying Cross in World War II for action during May 26–31, 1944.[17]

Retirement and death[edit]

Buie retired from TRW in 1983,[2] he died in Panorama City September 25, 1988, from emphysema.[1]


  1. ^ a b c d e "James L. Buie, 68; Scientist, Inventor". Los Angeles Times. Los Angeles, California. September 28, 1988. Retrieved November 14, 2015. Sep 28, 1988 – James L. Buie, whose many patents included one for electronic logic devices that led to the start of the integrated circuit industry, has died. 
  2. ^ a b c d e f g Lee, J. A. N. (2013). "Computer Pioneers". James L. Buie. IEEE Computer Society. Retrieved November 14, 2015. While working for TRW, Inc., Los Angeles, in the early 1960s, Buie developed and patented TTL circuitry, which became the dominant IC technology in the 1970s and early 1980s. 
  3. ^ "Independent inventions of TTL". The Rise of TTL: How Fairchild Won a Battle But Lost the War. Computer History Museum. Retrieved November 14, 2015. 
  4. ^ New in Integrated Circuits: Transistor-Coupled Logic, Hayden Publishing Company, 1961, p. V9_Part4_p2, retrieved November 15, 2015 
  5. ^ Frequency Technology. Frequency, Inc. 1970. p. 9. 
  6. ^ "1963 – Standard Logic IC Families introduced". The Silicon Engine. Computer History Museum. 2014. Patented by James Buie of Pacific Semiconductor in 1961, TTL (Transistor Transistor Logic) emerged as the most popular logic configuration of the next two decades. 
  7. ^ Electronics. Electronics. 53. McGraw-Hill Publishing Company. 1980. The logic known today as standard transistor-transistor logic, or TTL, evolved from work done at several sources, but can be traced to James L. Buie, an IC designer at Pacific Semiconductors, who had devised in 1961 a better coupling technique that isolated stages with coupling transistors. 
  8. ^ Computer Design. volume 21. Computer Design Publishing Corporation. September 1982. p. 93. James L. Buie (TRW) For the development of reliable high performance integrated circuits. 
  9. ^ House & Price 2009, p. 579.
  10. ^ Burghartz 2013, p. 228.
  11. ^ "THE INTEGRATED CIRCUIT". Fazano. 2015. Retrieved November 15, 2015. In early sixties, Pacific Semiconductor Company launched in the market the TTL logic or Transitor-Transistor Logic, as well as through the researches of the IC designer James L. Buie had devised a better coupling technique known as transistor-coupled transitor logic – TCTL. 
  12. ^ John Keller (December 18, 2011). "Former TRW Space Park, now Northrop Grumman, designated as historic site for electronics and aerospace work". Space Technology. Military & Aerospace Electronics. Retrieved November 15, 2015. The TTL logic gate, which was the electronics industry standard for two decades, was invented by TRW's James L. Buie in 1961. 
  13. ^ "Logic Families (book review)". Better World Books. 2015. Retrieved November 16, 2015. TTL was invented in 1961 by James L. Buie of TRW, "particularly suited to the newly developing integrated circuit design technology." The first commercial integrated-circuit TTL devices were manufactured by Sylvania in 1963, called the Sylvania Universal High-Level Logic family. 
  14. ^ "The Fascinating Transistor-transistor Logic (TTL) Clock!". ScienceProg. CircuitGeek. 2008. Retrieved November 14, 2015. 
  15. ^ a b Lee 1995, p. 145.
  16. ^ "Patents by Inventor James L. Buie". Integrated Legal Research & Business Intelligence. Justia. 2015. Retrieved November 15, 2015. 
  17. ^ "Hall of Valor: Distinguished Flying Cross: James L. Buie". Military Times. 2015. Retrieved November 14, 2015. 


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