Photosensitive row transfer device provided with negative feedba

Details Photosensitive row transfer device provided with negative feedba Photosensitive row transfer device provided with negative feedba

1985-09-30

1987-07-14

LaRoche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

35821326, H04N 314

Patent

active

046804765

ABSTRACT:
Use is made of a row memory and a read register, in which charge transfer takes place in volume. The threshold voltage of the negative feedback amplifiers is adjusted so that the operating point of the assembly constituted by each amplifier, the diode and the gate of the memory to which it is connected is located in the high gain zone of the transfer characteristic of the amplifier. It is possible to adjust the threshold voltage by an enhancement in its own type of impurities of the zone of the substrate located beneath the gate of one of the MOS transistors constituting the amplifier.

REFERENCES:
patent: 4506299 (1985-03-01), Berger et al.
IEEE Journal of Solid State Circuits, vol. SC-12, No. 3, Jun. 1977, "A Fast Sample & Hold Charge-sensing Circuit for Protodiode Arrays", (Paul G. A. Jespers, Christian Jusseret & Yves Leduc).

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