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:
Jan. 06, 2004
Filed:
Feb. 28, 2003
Gabriel J. Gomez, Plano, TX (US);
Baher S. Haroun, Allen, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Sigma delta modulators and digital to analog converters therefor are disclosed, in which intentional mismatch is provided in circuit elements of the digital to analog converter to facilitate tone reduction where dynamic element matching is used in selecting the digital to analog converter circuit elements. Methods are disclosed for fabricating digital to analog converters for providing analog feedback using a group of circuit elements selected according to a quantized output signal in a sigma delta modulator, in which a plurality of matched circuit elements having values within a tolerance amount of a design value are provided in the group along with at least one mismatched circuit element having a mismatched element value differing from the design value by a mismatch amount, where the mismatch amount is greater than the tolerance amount.