United States Patent [19] [ii] Patent Number: 4,600,846
Burrows [45] Date of Patent: Jul. 15, 1986
[54] UNIVERSAL LOGIC CIRCUIT MODULES
[75] Inventor: James L. Burrows, Merrimack, N.H.
[73] Assignee: Sanders Associates, Inc., Nashua,
N.H.
[21] Appl. No.: 539,504
[22] Filed: Oct. 6,1983
[51] Int. CI.* H03K 19/177; H03K 19/20;
G06F 7/50
[52] U.S. CI 307/465; 307/202.1;
307/445; 364/784
[58] Field of Search 307/202.1, 440, 445,
307/465-469; 340/825.8, 825.83, 825.84, 825.87; 364/716, 784
[56] References Cited
U.S. PATENT DOCUMENTS
3,239,687 3/1966 Steele 307/445
3,593,317 7/1971 Fleisher et al 364/716 X
3,731,073 5/1973 Moylan 307/465 X
3,737,859 6/1973 Kadow 340/825.87
3,805,037 4/1974 Ellison 340/825.87 X
4,257,008 3/1981 Shepter 307/465 X
4,422,072 12/1983 Cavlan 307/465 X
OTHER PUBLICATIONS
Hicks, "Sequence Controllers Using Programmable Logic Arrays", IBM TDB, vol. 19, No. 8, pp. 3183-3184, 1/1977.
Muroga et al, IEEE Trans, on Computers; vol. C-25, No. 9; 9/1976; pp. 839-907.
IEEE Trans, on Computers; vol. C-21, No. 2, pp. 153-160, 2/1972, Baugh et al.
Gardner, "Logic Array"; IBM TDB; vol. 18, No. 2, pp. 557-559; 7/1975.
Primary Examiner—Larry N. Anagnos
Attorney, Agent, or Firm—Louis Etlinger; Wm. F.
Porter, Jr.
[57] ABSTRACT
Universal logic circuit cells for use in designing and laying out electronic circuits. The cells provide AND and OR on other logical functions on input signals, and include a conventional AND or OR gate, or other logic gate, and associated input and output connections and circuitry that enables them to be used in many applications. The cells simplify laying out a combinatorial logic circuit after it has been designed.
13 Claims, 6 Drawing Figures
