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:
Mar. 30, 2010
Filed:
May. 02, 2008
Dinesh Jain, Bangalore, IN;
Kaushal Kumar Jha, Bangalore, IN;
Dinesh Jain, Bangalore, IN;
Kaushal Kumar Jha, Bangalore, IN;
Analog Devices, Inc., Norwood, MA (US);
Abstract
A system and method for calibrating an RDAC to obtain an expected resistance are disclosed. In one embodiment, a method of obtaining an expected resistance from an RDAC circuit includes receiving a digital signal comprising a digital code by an on-chip calibration code engine, automatically deriving a calibrated digital code based on resistance versus digital code characteristic curves of an expected RDAC and the RDAC associated with the calibration code engine, and inputting the calibrated digital code into the RDAC associated with the calibration code engine to obtain an expected resistance. The method also includes forming the resistance versus digital code characteristic curves of the expected RDAC and the RDAC, computing a gain error and an offset error using the formed resistance versus digital code characteristic curves of the RDAC and the expected RDAC and storing the gain error and the offset error in a non-volatile/volatile RDAC memory.