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US Patent 7737875 Time interpolation flash ADC having automatic feedback calibration

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Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7737875
Date of Patent
June 15, 2010
Patent Application Number
12270609
Date Filed
November 13, 2008
Patent Citations Received
‌
US Patent 11962318 Calibration scheme for a non-linear ADC
0
‌
US Patent 11881867 Calibration scheme for filling lookup table in an ADC
0
Patent Primary Examiner
Howard Williams
Howard Williams
Patent abstract

An input signal is compared to 2N−1 reference voltages to generate 2N−1 corresponding binary valued comparison signals, delaying at least one of the comparison signals by a variable delay and detecting a difference in arrival time between the delayed signal and another comparison signal. A time interpolation signal encoding a plurality of bins within a least significant bit quantization level is generated, based on the detected difference in arrival time. An M-bit output data is generated based on the comparison signals and the time interpolation signal. A non-uniformity of a code density of the M-bit output data is detected, and based on the detecting the delaying is varied.

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