Reference voltage stabilization in CMOS sensors

Details Reference voltage stabilization in CMOS sensors Reference voltage stabilization in CMOS sensors

2006-12-19

2006-12-19

Nguyen, Linh (Department: 2819)

Coded data generation or conversion

Sample and hold

C341S155000

Reexamination Certificate

active

07151472

ABSTRACT:
A reference voltage generator for use in an image sensor provides a reference voltage to an S/H block during a pixel read-out operation and another reference voltage to an analog-to-digital converter (ADC) during a digitization operation. The reference voltage generator includes a variable voltage generator, a sample-and-hold circuit to sample a reference voltage prior to the pixel read-out operation or the digitization operation, and a buffer amplifier to drive the appropriate reference voltage to the relatively high impedance load presented by the S/H block and the variable impedance load provided by the ADC.

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