Charge transfer circuit with leakage current compensating means

Details Charge transfer circuit with leakage current compensating means Charge transfer circuit with leakage current compensating means

1977-10-17

1979-05-22

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307221D, 307304, G11C 1928, H03K 2502, H03K 104

Patent

active

041561520

ABSTRACT:
A charge transfer circuit of the type including first and second charge storage locations and a charge transfer transistor for transferring a plurality of discrete packets of charge from the first to the second charge storage location is disclosed. The charge transfer circuit includes circuitry for compensating for changes in a thermally induced leakage current such that the charge transfer transistor transfers a variable amount of charge from the first to the second charge storage location during each successive charge transfer operation such that the total amount of charge, i.e. the leakage charge plus the transferred charge packet, accumulated by the second charge storage location during each charge transfer operation, is a constant regardless of changes in the temperature or illumination of the transistor. In a second embodiment, changes in the magnitude of the thermally or optically induced leakage current are taken into account by adjusting the magnitude of an analog signal to which the total amount of charge stored in the second charge storage location is compared.

REFERENCES:
patent: 3621402 (1971-11-01), Gardner
patent: 3819954 (1974-06-01), Butler et al.
patent: 3876952 (1975-04-01), Weimer
patent: 4047051 (1977-09-01), Heller
patent: 4047053 (1977-09-01), Ley et al.
patent: 4092549 (1978-05-01), Prince

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