Yanyi Liu Wong

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We present a high-speed voltage comparator that uses floating gate adaptation to achieve high comparison resolution. The comparator uses nonvolatile charge storage for either offset nulling or automatic programming of a desired offset. We exploit the negative feedback functionality of pFET hot-electron injection to achieve fully automatic offset(More)
We present a novel voltage comparator that uses nonvolatile floating-gate charge storage for either offset nulling or automatic programming of a desired offset. We exploit the negative feedback mechanism of pFET hot-electron injection to achieve fully automatic offset cancellation. The adaptation guarantees an input offset less than the input-referred noise(More)
The authors present theory, design and measurement results for an online histogram equalization algorithm implemented on a 750MS/s 6b flash analog to digital converter in standard 0.35mum CMOS. The user simply turns on "training mode" for a few seconds, while the algorithm automatically adjusts comparator levels to match the observed input signal(More)
We introduce differential-mode hot electron injection for adapting and storing analog nonvolatile signed state variables. This approach is compatible with modern digital CMOS technologies and is readily extended to novel circuit applications. We highlight advantages of the technique by applying it to the design of an adaptive floating gate comparator(More)
In present scenario high speed and low power devices in signal processing system is generally needed the efficient design and reduced complexity of converters, therefore conventional flash ADC is not fully meet the required specifications. ADC with high speed and low resolution is required in present communication technologies. Lower leakage current with(More)
Title of dissertation: ADAPTATION IN STANDARD CMOS PROCESSES WITH FLOATING GATE STRUCTURES AND TECHNIQUES Yanyi Liu Wong Doctor of Philosophy, 2007 Dissertation directed by: Professor Pamela Abshire Department of Electrical and Computer Engineering We apply adaptation into ordinary circuits and systems to achieve high performance, high quality results.(More)
We apply the technique of floating-gate differential injection to a 1.2-GHz CMOS comparator to achieve arbitrary, accurate, and adaptable offsets. The comparator uses nonvolatile charge storage on floating-gate nodes for either offset nulling or automatic programming of a desired offset. We utilize impact-ionized pFET hot-electron injection to achieve fully(More)
We present a novel CMOS continuous-current imager that uses nonvolatile floating-gate charge storage in each pixel for automatic cancellation of fixed-pattern noise (FPN) and vignetting artifacts. We demonstrate the ability to reduce image artifacts over a wide range of incident light intensities. Adaptation occurs for each pixel in parallel, using a unique(More)