Image sensor for implementing data read operation at high speed

Details Image sensor for implementing data read operation at high speed Image sensor for implementing data read operation at high speed

2005-03-15

2005-03-15

Garber, Wendy R. (Department: 2612)

Television

Camera, system and detail

Solid-state image sensor

C348S302000, C341S155000

Reexamination Certificate

active

06867804

ABSTRACT:
An image sensor is an apparatus for sensing a light beam to generate a digital image data. The image sensor includes a pixel array for sensing a light beam to generate an analog image data, a control and interface unit for managing an interface with external circuits and generating control signals, a decoding unit for decoding the column address signal to generate a column selection signal, and a conversion unit for converting the analog image data into a digital image data. The conversion unit includes a ramp voltage generation circuit for generating a ramp voltage signal, a comparison circuit for comparing a voltage level of the ramp voltage signal with that of the analog image data to generate a latch enable signal, a storage circuit for storing the digital count signal in response to the latch enable signal and outputting stored digital count signal to a bit line in response to the control signals, and an acceleration circuit for detecting a voltage variation of the bit line to accelerate the voltage variation of the bit line.

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