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:
Oct. 01, 1996
Filed:
Apr. 05, 1995
Jeff Kotowski, Nevada City, CA (US);
Richard D Davis, Aliso Viejo, CA (US);
Silicon Systems, Inc., Tustin, CA (US);
Abstract
The present invention discloses method and apparatus for offset and phase correction in multiplexed delta-sigma modulators. According to the invention, offsets and phases of input signals to multiplexed delta-sigma modulators are corrected by a simple and low cost method. The invention utilizes a novel switching technique during different sampling periods to eliminate the effect of DC offsets present in multiplexed input signals. The invention also uses a delay introduced by a FIFO or a shift register to individually correct for phase shifts present in individual multiplexed input signals. The invention accomplishes these objectives without introducing a significant quantization noise, and without requiring overlapping FIR filters.