Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1979-03-09
1980-12-16
Munson, Gene M.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
357 24, G11C 1928, H01L 2978
Patent
active
042399831
ABSTRACT:
A circuit is disclosed for obtaining a quantity of electrical charge carriers equal to and representative of the algebraic difference between the values of two original quantities of electrical charge carriers. The circuit includes two charge coupled device input shift registers. Each of the two shift registers incorporates at least three potential well electrodes and interposed transfer electrodes such that charge packets can be shifted from well to well. One potential well in each of the two shift registers is operated in a floating gate electrode mode, and the two potential wells are connected at a common node which services as the input to a third or output charge coupled device shift register. The two original quantities of electrical charge carriers are represented respectively in each of the two input shift registers by a pair of spatially separated charge packets which when sensed by sequencing them into and out of the potential well under the floating gate electrode provide the algebraic value of the associated quantity of electrical charge carriers. By representing each original charge quantity by two spatially separated pairs of charge packets, positive and negative algebraic values may be representing even though all the charge quantities are made up of charge carriers of the same polarity. Combining the two floating gate electrodes at the common node rectifying input to the third or output shift register produces an algebraic value in the output shift register which represents the difference between the original charge packets.
REFERENCES:
patent: 4035667 (1977-07-01), Heller
patent: 4047051 (1977-09-01), Heller
patent: 4104543 (1978-08-01), Maeding
Critchlow et al., "Magnitude Differencing Circuit" IBM Technical Disclosure Bulletin vol. 18 (2/76) p. 3071-3072.
Edwards Nathan P.
White James M.
Goodwin John J.
International Business Machines - Corporation
Munson Gene M.
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