Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1984-05-11
1986-12-02
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307270, 307458, H03K 1921, H03K 19092, H03K 19013
Patent
active
046267115
ABSTRACT:
An exclusive-or circuit which is extremely fast, uses lower power and fewer components, and is easier to manufacture than prior art circuits is achieved in a circuit which uses only a single reference voltage potential (shown as positive) in the portion of the circuit which generates exclusive-nor logic, and uses a feedback transistor to prevent saturation of a switching transistor. In the off state of the switching transistor, the single reference potential causes the base to be several saturation potentials above ground. In the on state, the feedback transistor reduces the base current. Thus the voltage swing between on and off states is less than in prior art circuits. In addition, the logic from many input signals can be combined to create a single exclusive-nor signal before buffering to an exclusive-or signal at the output terminal.
REFERENCES:
patent: 3821719 (1974-06-01), Taniguchi et al.
patent: 4251884 (1981-02-01), Baun, Jr.
patent: 4355246 (1982-10-01), Usui
patent: 4413195 (1983-11-01), Birch
patent: 4504744 (1985-03-01), Balakrishnan
Palmieri et al, "Exclusive OR Circuit", IBM Tech. Discl. Bull., vol. 13, No. 5, p. 1074, Oct. 1970.
Bertelson David R.
Miller Stanley D.
National Semiconductor Corporation
Winters Paul J.
Woodward Gail W.
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