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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.:

US 7292630 B1

PDFFull Text
Date of Patent:
Nov. 06, 2007

Filed:

Apr. 17, 2003

Limit-cycle-free fir/iir halfband digital filter with shared registers for high-speed sigma-delta a/d and d/a converters

Applicant:

Zhongnong Jiang, Richardson, TX (US);

Inventor:

Zhongnong Jiang, Richardson, TX (US);

Assignee:

Texas Instruments Incorporated, Dallas, TX (US);

Attorneys:

Wade J. Brady, III

Frederick J. Telecky, Jr.

Primary Examiner:

David C Payne

Assistant Examiner:

Nader Bolourchi

Int. Cl.
CPC ...
H03H 7/30 (2006.01); H03H 7/40 (2006.01); H03K 5/159 (2006.01);
U.S. Cl.
CPC ...
Abstract

A multiplexed FIR/IIR digital filter structure () which offers linear phase response and low group delay by switching on a FIR filter portion () or a IIR filter portion (). To reduce the silicon area, the FIR/IIR filter () shares registers which is enabled because the FIR and IIR processing do not use the registers at the same time but rather consecutively. Further, the multiplexed FIR/IIR digital filter structure () can offer limit-cycle-free IIR operation using two's-complement truncation in combination with positive valued allpass coefficients.

Find Patent Forward Citations

Jiang, Zhongnong. (2007). Limit-cycle-free fir/iir halfband digital filter with shared registers for high-speed sigma-delta a/d and d/a converters (U.S. Patent No. 7292630). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7292630

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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