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:
Jun. 16, 2015
Filed:
Jan. 22, 2013
Applicant:
Microsemi Semiconductor Ulc, Kanata, CA;
Inventor:
Qu Gary Jin, Kanata, CA;
Assignee:
Microsemi Semiconductor ULC, Kanata, ON, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/10 (2006.01); H03H 17/02 (2006.01); H03H 17/04 (2006.01);
U.S. Cl.
CPC ...
G06F 17/10 (2013.01); H03H 17/0219 (2013.01); H03H 17/04 (2013.01);
Abstract
A digital infinite impulse response filter has a plurality of cascaded filter elements, with each filter element defining a pole of the filter and wherein the poles lie inside a unit circle. The filter elements are configured such that the p of the last filter element is a real number. In one embodiment the poles are arranged as complex conjugate pairs. In another embodiment the real part of the output of each filter element is extracted before being passed to the next filter element. This architecture offers improved idle tone with reduced complexity.