Charge detecting device controlling reset transistor operation

Details Charge detecting device controlling reset transistor operation Charge detecting device controlling reset transistor operation

1992-06-08

1993-05-25

Munson, Gene M.

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

Charge transfer device

Particular input or output means

257239, 257216, G11C 1928, H01L 2978

Patent

active

052146839

ABSTRACT:
A charge detecting device comprises a floating diode for accumulating a signal charge, a source-follower amplifier for detecting a variation in a surface potential of the floating diode, a reset transistor, a transistor having a same size to the reset transistor for detecting a channel potential of the reset transistor and a reset pulse supplying means including an inverting amplifier, in which the channel potential of the reset transistor detected by the transistor is amplified and is added with a binary digit pulse inputted through an AC coupled capacitor to be made into a reset pulse which is applied to a gate electrode of the reset transistor. This allows automatic setting of each level of the suitable reset pulse in response to a variation in the channel potential of the reset transistor without any external circuits for setting reset pulse levels.

REFERENCES:
patent: 4809307 (1989-02-01), Sakaue et al.

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