Null convention threshold gate

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3649361, G06F 100

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active

056642113

ABSTRACT:
A NULL convention threshold gate receives a plurality of inputs, each having an asserted state and a NULL state. The threshold gate switches its output to an asserted state when the number of asserted inputs exceeds a threshold number. The threshold gate switches its output to the NULL state only after all inputs have returned to NULL.

REFERENCES:
Anthony S. Wojcik & Kwang-Ya Fang, On the Design of Three-Valued Asynchronous Modules, IEEE Transactions on Computers, vol. C-29, No. 10, Oct. 1980, pp. 889-898.
Stephen H. Unger, Asynchronous Sequential Switching Circuits, 1969, pp. 221-229.
Carver Mead & Lynn Conway, Introduction to VLSI Systems, 1980, pp. 242-262.
Ivan E. Sutherland, Micropipelines, Communications of the ACM, Dec. 1989, vol. 32, No. 6.
Tadashi Shibata & Tadahiro Ohmi, A Functional MOS Transistor Featuring Gate-Level Weighted Sum and Threshold Operations, IEEE Transactions On Electron Devices, Dec. 1992, vol. 39, No, 6, pp. 1444-1455.
Mark Edward Dean, Strip: A Self-Time Risc Processor, Stanford University Computer Systems Laboratory Technical Report No. CSL-TR-92-543, Stanford, CA, Jul. 1992.
Daniel Hampel & Robert Winder, Threshold Logic, IEEE Spectrum, May 1971, pp. 32-39.
Janusz A. Brzozowski & Carl-Johan H. Seger, Asynchronous Circuits--Monographs in Computer Science, Springer-Verlag New York, Inc., 1995, New York, NY.

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