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:
Aug. 29, 2000
Filed:
Sep. 30, 1998
Applicant:
Inventors:
Prabir C Maulik, Austin, TX (US);
Mandeep Singh Chadha, Austin, TX (US);
Assignee:
Cirrus Logic, Inc., Austin, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03M / ; H03M / ;
U.S. Cl.
CPC ...
341120 ; 341143 ;
Abstract
A technique for performing gain calibration on an analog-to-digital converter (ADC) in which offset errors are canceled during gain calibration. In an ADC having a differential integrator at the input of a modulator, two calibration measurements are obtained at the output, one based on a calibration input and the second based on the reversal of the input polarity. The two measured outputs are subtracted from each other so that offset errors introduced by the converter during gain calibration are cancelled.