Artifact Details


Beeson patent notebook (#25)

Catalog Number





This volume continues the testing of transistor switching characteristics from Beeson (p. 20). Other topics include, circuits for measuring RTH in avalanche mode that resulted in TR33 and NEC paper (below); note re. data taken in author’s absence by D. Farina for DCTL; note regarding J. Last’s “solid-state flip-flop” (p. 33); idea for stereo amplifier system using a single amp circuit; evaluation of TDL and LLL logic configurations; tunnel diode study (p. 110).




Beeson, R.H.

Biographical Notes

R.H. Beeson joined Fairchild circa mid-1958 and remained at least until mid-1961. He worked for Vic Grinich on the application of transistors for high-speed switching in logic applications. He independently invented the Transistor Transistor Logic (TTL) logic configuration that was described in the 1962 ISSCC paper “New Forms of All-Transistor Logic” co-authored with H. W. Ruegg. Commercialized by Sylvania and copied and successfully promoted by Texas Instruments, TTL formed the workhorse digital IC family of the 1970s. In the late 1960s he was working for Amelco Semiconductor.


Fairchild Semiconductor Corporation

Identifying Numbers

Document number 2


73 dated entries over 152 pages.


12 x 10 inches



Collection Title

Fairchild Semiconductor notebooks and technical papers


The author contributed to the following R&D Technical Reports (TR) and papers in professional publications during his service at Fairchild:

TR33 Short report on avalanche switching of standard and epitaxial FT-1340’s utilizing modified collector triggering (1961-01-16).

Allison, D., Beeson, R. and Shultz, R., KMC planar transistors in microwatt logic circuitry . 1961 IEEE International Solid-State Circuits Conference: Digest of Technical Papers, vol. IV (1961): 62 – 63.

Beeson, R. H., Haas, I. and Grinich, V. H., Thermal response of transistors in the avalanche mode. National Electronics Conference, 1959-10-12-1959-10-14. (Reprinted as Fairchild TP-6)

Beeson, R. and Ruegg, H., New forms of all-transistor logic. 1962 IEEE International Solid-State Circuits Conference: Digest of Technical Papers. vol. V (1962): 10-11.

Maxwell, D. A., Beeson, R. H. and Allison, D. F., The minimization of parasitics in integrated circuits by dielectric isolation. IEEE Transactions on Electron Devices, vol. 12, iss. 1 (1965): 20-25.


Gift of Texas Instruments Incorporated

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