The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 2014
Filed:
Dec. 20, 2011
Robert Schell, Chatham, NJ (US);
Michael R. Elliott, Summerfield, NC (US);
Robert Schell, Chatham, NJ (US);
Michael R. Elliott, Summerfield, NC (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A system and method are described herein that provide for the calibration of the offset of a comparator on a per-comparator basis. An injection is made to the comparator at determined injection points using a low-power DAC, to calibrate the offset of the comparator. The DAC can be selectively controlled by a digital codeword that is generated based on an output of the comparator and the comparator's offset. Further embodiments of the invention present a system and method for calibrating the offset of a comparator of a flash ADC in each stage of a pipeline ADC. The system and method may provide for the calibration in a manner without affecting the speed of the pipeline ADC or adding significant power to the pipeline ADC.