Charge transfer circuits with dark current compensation

Details Charge transfer circuits with dark current compensation Charge transfer circuits with dark current compensation

1979-02-28

1983-10-25

Munson, Gene M.

Electrical pulse counters, pulse dividers, or shift registers: c

Charge transfer device

Compensating for or preventing signal charge deterioration

357 24, G11C 1928, H01L 2978

Patent

active

044123434

ABSTRACT:
Dark current compensation is obtained in a charge transfer circuit such as a charge coupled device (CCD) delay line by subtracting from each charge packet, after each predetermined number of shifts of that charge packet, a certain amount of charge. In a preferred form of the circuit, a reference charge packet is periodically introduced into the delay line and the amount of dark current it has accumulated after a given number of shifts is sensed and is employed to determine how much of each charge packet will be periodically removed.

REFERENCES:
patent: 3758794 (1973-09-01), Kosonocky
patent: 3819954 (1974-06-01), Butler et al.
patent: 3969634 (1976-07-01), Su et al.
patent: 3983409 (1976-09-01), Adam
patent: 4134028 (1979-01-01), Kosonocky et al.
patent: 4230952 (1980-10-01), Knauer
Levine "Measurement of CCD Transfer Efficiency by Use of Feedback . . . " IEEE J. Solid-State Circuits vol. Sc-8 (4/73) pp. 104-108.

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