Regenerative charge detector for charged coupled devices

Details Regenerative charge detector for charged coupled devices Regenerative charge detector for charged coupled devices

1974-08-22

1976-09-07

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307235T, 307279, 307DIG3, 357 24, H03K 518, H03K 520, H03K 3286, H01L 2978

Patent

active

039796035

ABSTRACT:
The disclosure relates to an improved detector for use in digital charge coupled device (CCD) applications for recreating full logic voltage levels by detecting extremely small amounts of charge available in CCD bits. This is accomplished by means of a flip-flop circuit wherein opposite nodes of the flip-flop are precharged to a predetermined intermediate level between a logical 0 and a logical 1, one of the nodes being a reference node and the other node being coupled to a CCD storage device. During sampling of the bits being read out from the CCD storage device, the detecting node of the flip-flop will have its voltage altered, either upwardly or downwardly, from the charge on the CCD being read out. This will cause an imbalance in the flip-flop and cause the flip-flop to conduct on only one side thereof, this being determined by the charge detected. In this way, a very low level signal can be detected and amplified to a full logic voltage level for readout.

REFERENCES:
patent: 3678473 (1972-07-01), Wahlstrom
patent: 3758794 (1973-09-01), Kosonocky
patent: 3771148 (1973-11-01), Aneshansley
patent: 3774176 (1973-11-01), Stein et al.
patent: 3787852 (1974-01-01), Puckette et al.
patent: 3806898 (1974-04-01), Askin
patent: 3838404 (1974-09-01), Heeren

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