Solid image pickup device having dual integrator

Details Solid image pickup device having dual integrator Solid image pickup device having dual integrator

1994-03-15

1995-06-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250561, 348297, H01J 4014

Patent

active

054245303

ABSTRACT:
A solid image pickup device for optical measurement with a high signal to noise ratio. A photosensitive unit includes a first integrator that integrates a signal in a first capacitor connected between an input and output thereof triggered by a first reset signal, a second integrator that integrates a signal in a third capacitor triggered by a second reset signal, a switching device and a second capacitor connecting the output of the first integrator to the input of the second integrator, an up/down counter and a timing control circuit for operating the other elements to achieve proper integration.

REFERENCES:
patent: 4237377 (1980-12-01), Sansum
patent: 4642451 (1987-02-01), Tsunekawa et al.
patent: 5272328 (1993-12-01), Furukawa

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