Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1979-12-28
1982-03-09
Anagnos, Larry N.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307455, 307458, 307470, H03K 1921, H03K 19013
Patent
active
043191487
ABSTRACT:
A 3-way Exclusive OR function is performed in an essentially single stage logic delay. A 3-way OR circuit produces a logical "1" output whenever at least one of three input operands is "1". A Two And Only Two logic circuit produces a logical "0" output when two and only two of the three input operands are "1". The outputs of the OR circuit and the Two And Only Two logic circuits are DOT-ANDed to provide a desired Exclusive OR function. In one form of the invention, the Two And Only Two logic circuit comprises three Schottky diode transistor NAND circuits each having two normal inputs and one inhibit input with the inhibit input of each of the three NAND circuits being connected to receive a different one of the three input operands while the two normal inputs being connected to receive the remaining ones of the three input operands. The OR circuit comprises four transistors having their emitters coupled to a common current source. The base of one of the four transistors is connected to a reference potential while the bases of the other three transistors are connected to receive respective one of the three input operands. Outputs of the three NAND circuits and the output of the 3-way OR circuit are DOT-ANDed at an input of an emitter follower output stage.
REFERENCES:
patent: 2850647 (1958-09-01), Fleisher
patent: 2926850 (1960-03-01), Richards
patent: 2927733 (1960-03-01), Campbell, Jr.
patent: 3016466 (1962-01-01), Richards
patent: 3628000 (1971-12-01), Weiss
patent: 3649844 (1972-03-01), Kroos
patent: 4041326 (1977-08-01), Robinson
patent: 4133040 (1979-01-01), Hampel
Gersbach, "Four-Way Exclusive-OR", IBM Tech. Discl. Bull., vol. 11, No. 9, pp. 1162-1163; 2/69.
Gersbach, "Cascade Exclusive OR", IBM Tech. Discl. Bull., vol. 19, No. 6, pp. 2010-2011; 11/76.
Lohrey et al. "Gated Exclusive or Circuit", IBM Tech. Discl. Bull., vol. 19, No. 6; pp. 2080; 11/76.
Evans, "Exclusive-OR Complement Circuit", IBM Tech. Discl. Bull., vol. 9, No. 9, pp. 1210-1211; 2/67.
Anagnos Larry N.
Brown Edward W.
International Business Machines Corp.
LandOfFree
High speed 3-way exclusive OR logic circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High speed 3-way exclusive OR logic circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High speed 3-way exclusive OR logic circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1842440