Browsing by Author "CHI, SHUN-MIN"

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SELF-CALIBRATING HIGH-SPEED ANALOG-TO-DIGITAL CONVERTER
(2008-07-31)
SU, CHAU-CHIN
;
LU, HUNG-WEN
;
CHI, SHUN-MIN
A precisely self-calibrating high-speed analog to digital converter is disclosed, wherein the aspect ratios of tri-state inverters are adjusted to fine-tune threshold voltage as comparators. And the multiplexers composed of tri-state inverters amplify the signal from the output of comparators. Their switches of tri-state inverters may be properly controlled to select the optimal channels and reduce unnecessary power consumption. The calibration circuitry utilizes under-sampling to calculate the duty cycles of comparators, selecting the optimal comparators and channels. By the way, the invention may avoid process variation.