Output circuit having high charge to voltage conversion gain

Details Output circuit having high charge to voltage conversion gain Output circuit having high charge to voltage conversion gain

1990-04-02

1991-07-02

Munson, Gene M.

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

Charge transfer device

Particular input or output means

357 24, 330277, 330292, G11C 1928, H01L 2978, H03F 316, H03F 110

Patent

active

050291904

ABSTRACT:
An output circuit for CCD imager devices or CCD delay devices is disclosed in which a depletion type second MIS transistor is connected to the drain side of a first MIS transistor constituting a source follower adapted for converting transferred signal signals into an electrical voltage, and an output voltage is supplied to the gate of the second MIS transistor. This depletion type second MIS transistor causes the drain potential of the first MIS transistor to be changed in phase with the input electrical charges to reduce the gate-to-drain capacitance of the first MIS transistor to improve the charge-to-voltage conversion gain.

REFERENCES:
patent: 4556851 (1985-12-01), Levine
patent: 4811371 (1989-03-01), Tower

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