Output circuit for a CCD with a D.C. restoration circuit integra

Details Output circuit for a CCD with a D.C. restoration circuit integra Output circuit for a CCD with a D.C. restoration circuit integra

1991-11-27

1993-06-15

Sikes, William L.

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

Charge transfer device

377 58, 377 60, 377 63, H03K 3353

Patent

active

052205878

ABSTRACT:
An amplification MOSFET in a source ground form receives at its gate an output signal of a source-follower circuit through a second capacitor. The source-follower circuit, on the otherhand, receives a voltage of a first capacitor which receives a signal charge. A predetermined bias voltage is supplied to the gate of the amplification MOSFET through a switch device while the signal charge of the first capacitor is reset. According to this structure, the second capacitor can transmit only the signal component and the voltage signal itself can be amplified by the source ground type amplification MOSFET. The amplification MOSFET can be biased to its optimum operation point by the switch device during the reset period of the first capacitor; hence, sensitivity can be substantially improved with a simple circuit structure.

REFERENCES:
patent: 4355244 (1982-10-01), Benoit-Gonin et al.
patent: 4503550 (1985-03-01), Sauer

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