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:
Dec. 03, 2002
Filed:
Dec. 04, 2001
Applicant:
Inventors:
Robert S. Jones, III, Austin, TX (US);
Brett J. Thompsen, Chandler, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/10 ; H03M 1/34 ;
U.S. Cl.
CPC ...
H03M 1/10 ; H03M 1/34 ;
Abstract
A RSD analog to digital converter has an RSD stage that in turn has a switched capacitor integrator (SCI). The SCI uses an operational amplifier. A capacitor, which operates as a offset compensation capacitor, is precharged to the offset voltage of the operational amplifier during a precharge phase. The next phase switches this offset compensation capacitor in the path of the capacitors which are used to perform the integration. The effect is that the offset of the operational amplifier is corrected by the use of the compensation capacitor that had been precharged to the offset voltage during the previous phase.