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. 29, 2009
Filed:
Nov. 27, 2007
Nitin Agarwal, Bangalore, IN;
Ramesh Kumar Singh, Bangalore, IN;
Visvesvaraya a Pentakota, Bangalore, IN;
Dantes John, Bangalore, IN;
Supreet Joshi, Bangalore, IN;
Nitin Agarwal, Bangalore, IN;
Ramesh Kumar Singh, Bangalore, IN;
Visvesvaraya A Pentakota, Bangalore, IN;
Dantes John, Bangalore, IN;
Supreet Joshi, Bangalore, IN;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An offset correction circuit examines a residue signal of a stage of a pipeline analog to digital converter (ADC) to determine whether a parameter which could cause offset error, needs to be adjusted. In an embodiment, the parameter is adjusted until a maximum range of the residue signal equals an expected range. In the described examples, the adjusted parameters include timing offset error (when components of an ADC sample the input signal at different time instances) and a voltage offset error (the threshold voltage at which a sub-ADC in a stage the generated sub-code changes to a next value).