Multi-mode ADC and its application to CMOS image sensors

Details Multi-mode ADC and its application to CMOS image sensors Multi-mode ADC and its application to CMOS image sensors

2008-01-15

2008-01-15

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S118000, C341S120000, C341S150000, C341S158000, C341S159000, C250S208100, C250S2140AG, C348S308000

Reexamination Certificate

active

11418119

ABSTRACT:
An analog-to-digital converter apparatus for analog source signals of one polarity, includes one comparator formed from transistors, a block of digitally addressable voltage sources to set a reference voltage of the comparator, an asynchronous n-bit digital counter, a block of digitally addressable voltage sources to set the potential to be applied to the signal source, a digital control unit, a block storing the calibration data for an input capacitor of the comparator, and a base-2multiplier block, being interconnected by lines, including a line connecting the input analog signal to the drain of a pass transistor, a line connecting the block of voltage sources to be connected to the signal source, a line connecting the digital control unit to transistor gates, and a line carrying the signal Vref from the block of digitally addressed voltage sources to the comparator.

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