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February 1973 (vol. 22 no. 2)
pp. 197-203
D. Hampel, Advanced Communications Laboratory, RCA Corporation
Threshold logic gates, up to now, generally have been presumed to provide a single function of the input variables. The threshold gates that have been integrated [1]-4] were naturally double-sided and provided complementary outputs or, more specifically, complemented dual outputs. This paper shows that the inphase and out-of-phase outputs can, in fact, be designed to provide grossly different functions of the input variables. Two examples of this technique have already been shown [5] and one of these, the full adder, has been demonstrated in a multiplier [6]. Now this technique is generalized, and furthermore, it is shown how each side can be subdivided to provide a number of functions simultaneously. Finally, virtual oRing of specific output points from each side will result in still more functions. The sum-resistor specification for any order function on either side is given. Practical application of these techniques are discussed, including those basic ones that have already been disclosed.
Index Terms:
Emitter coupled logic, high-speed logic, multifuction logic, parity circuits implemented with threshold logic, threshold logic, universal logic, virtual oRing.
Citation:
D. Hampel, "MultiFunction Threshold Gates," IEEE Transactions on Computers, vol. 22, no. 2, pp. 197-203, Feb. 1973, doi:10.1109/T-C.1973.223685
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