Solid-state imaging apparatus

Details Solid-state imaging apparatus Solid-state imaging apparatus

1997-04-01

2000-06-13

Garber, Wendy

Television

Camera, system and detail

Solid-state image sensor

348241, 348250, H04N 5335

Patent

active

060755644

ABSTRACT:
An analog voltage signal corresponding to a light intensity received by a photosensitive pixel is sampled. At the time when thus sampled analog voltage signal is inputted into a clamping circuit, a comparative voltage signal changing over time is coupled therewith by means of capacitive coupling. In a comparator circuit, the voltage level of the output signal from the clamping circuit is compared with the reference voltage level, while being changed. Then, the counter digital signal at the moment when the comparison result signal changes is latched in a holding circuit. Thus, imaging is executed accurately at a high speed.

REFERENCES:
Hoe et al.; An Auto-Ranging Photodiode Preamplifier with 114 DB Dynamic Range, IEEE Journal on Solid-State Circuits, pp. 187-194, Feb. 1996.
Garverick et al., "A 43-Channel IC for Programmable, Nonlinear Quantization of Multichannel Detector Data", IEEE Journal of Solid-State Circuits, vol. 30, No. 5, May 1995, pp. 4 533-541.

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