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US Patent 7405689 Predictive analog to digital converters and methods of using

Patent 7405689 was granted and assigned to Exar Corporation on July, 2008 by the United States Patent and Trademark Office.

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Current Assignee
Exar Corporation
Exar Corporation
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7405689
Patent Inventor Names
Sorin Andrei Spanoche3
Ion E. Opris3
Kent Kernahan3
Ping Lo3
Xuecheng Jin3
Date of Patent
July 29, 2008
Patent Application Number
11316636
Date Filed
December 21, 2005
Patent Citations Received
‌
US Patent 11881867 Calibration scheme for filling lookup table in an ADC
1
‌
US Patent 11962318 Calibration scheme for a non-linear ADC
2
Patent Primary Examiner
Jean B Jeanglaude
Jean B Jeanglaude
Patent abstract

Methods and devices perform analog to digital signal conversion in shorter time and/or with less power consumption than that of a comparable analog to digital conversion that uses a conventional sequential approximation method based on a binary search. A predictive guess is supplied as a digital first signal. The digital first signal is converted (D/A) to a counterpart, analog guess signal. Fewer cycles and less power is consumed if the initial guess is within a certain range of the actual magnitude of the analog input sample signal. In one embodiment, a digital modeler is used to model a process underlying the analog input sample signal to thereby provide fairly good guesses.

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