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:
May. 27, 2008
Filed:
Mar. 06, 2007
John Mcgrath, Santa Clara, CA (US);
Anthony J. Collins, Dundrum, IE;
John McGrath, Santa Clara, CA (US);
Anthony J. Collins, Dundrum, IE;
Xilinx, Inc., San Jose, CA (US);
Abstract
Method and apparatus for digital calibration of an analog-to-digital converter (ADC). One example relates to calibrating an analog-to-digital (A/D) conversion system having an N-bit resolution. The A/D conversion system includes an ADC that generates an output having N most significant bits (MSBs) and M least significant bits (LSBs) (i.e., an N+M bit resolution). An offset calibration circuit is configured to determine an offset in the ADC and to compensate the N+M bit output using the offset to provide an N+M bit offset corrected output. A gain calibration circuit is configured to determine a gain correction factor for the ADC and to compensate the N+M bit offset corrected output using the gain correction factor to provide an N bit offset and gain corrected output.