Balanced differential capacitively decoupled charge sensor

Details Balanced differential capacitively decoupled charge sensor Balanced differential capacitively decoupled charge sensor

1975-05-02

1976-09-28

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307221D, 307235H, 307DIG3, H03K 520, H01L 2978, G11C 1928

Patent

active

039834131

ABSTRACT:
A balanced differential capacitively decoupled charge sensor for detecting small amounts of charge comprises balanced differential sensing means adapted to receive charge representing data and charge representing a reference value, a pair of capacitance decoupling transistors, the respective drains of each of said pair of capacitance decoupling transistors being electrically coupled to the respective inputs of said differential sensing means, a matched pair of charge output nodes electrically coupled to the respective sources of said capacitance decoupling transistors and adapted to receive, respectively, data charge and reference charge, and means for biasing and resetting both of said charge output nodes so that said capacitance decoupling transistors are functioning in a high transconductance mode when data charge and reference charge are received.

REFERENCES:
patent: 3514765 (1970-05-01), Christensen
patent: 3678473 (1972-07-01), Wahlstrom
patent: 3758794 (1973-09-01), Kosonocky
patent: 3760381 (1973-09-01), Yao
patent: 3774176 (1973-11-01), Stein et al.
patent: 3838295 (1974-09-01), Lindell
patent: 3838404 (1974-09-01), Heeren
patent: 3882326 (1975-05-01), Kruggel
patent: 3892984 (1975-07-01), Stein
lohrey, "Monolithic Associative Memory Using Read/Write Array"; IBM Tech. Discl. Bull.; vol. 14, No. 6, pp. 1698-1699; 11/1971.

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