Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-07-26
1992-05-05
Westin, Edward P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307455, 307446, 307241, 307242, 307518, H03K 1716, H03K 19086, H03K 19003, H03K 1730
Patent
active
051110741
ABSTRACT:
A digital logic circuit having multiple inputs and a product-of-sums output uses multi input OR circuits with interacting constant-current and constant-voltage elements to improve voltage transfer characteristics. A second-level arbitration circuit connects to the OR circuits and provides mutually exclusive pull-up and pull-down control signals as a logical function of the states of the OR circuits. An output stage connects to the arbitration circuit. The output stage comprises pull-up and pull-down drivers responsive to the output of the second-level arbitration circuit. The digital logic circuit operates at high speed because its transistors are prevented from entering saturation. The logic circuit is easily expandable and provides a simple and direct method of implementing logic circuits which provide product-of-sums outputs.
REFERENCES:
patent: 3824409 (1974-07-01), Patil
patent: 4609834 (1986-09-01), Gal
patent: 4613771 (1986-09-01), Gal
patent: 4853561 (1989-08-01), Gravrok
patent: 4868904 (1989-09-01), Gravrok
Gravrok Roger J.
Warner, Jr. Raymond M.
Bertelson David R.
Regents of the University of Minnesota
Westin Edward P.
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