Readout circuit for an image sensor and analog-to-digital...

Details Readout circuit for an image sensor and analog-to-digital... Readout circuit for an image sensor and analog-to-digital...

2006-07-05

2008-11-04

Jeanglaude, Jean B (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

C341S155000, C341S122000, C341S169000, C348S241000, C348S217100, C348S229100

Reexamination Certificate

active

07446684

ABSTRACT:
A readout circuit is adapted for receiving a line analog image signal from an image sensor array of an image sensor. The readout circuit includes an amplifying unit, an m-bit analog-to-digital converter, and an m-to-n bit digital converting unit. The amplifying unit is adapted for amplifying and correcting amplitude of the line analog image signal, and outputs an amplified and corrected analog signal. The m-bit analog-to-digital converter is coupled to the amplifying unit, and is operable to convert the amplified and corrected analog signal into a corresponding m-bit digital signal. The m-to-n bit digital converting unit is coupled to the m-bit analog-to-digital converter, receives the m-bit digital signal from the m-bit analog-to-digital converter, and is responsive to a k-bit control signal for converting the m-bit digital signal into an n-bit digital signal, wherein m is greater than or equal to n.

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