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:
Sep. 02, 2008
Filed:
Feb. 12, 2003
Toshiyuki Sekizawa, Kawasaki, JP;
Toshiyuki Sekizawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In order to output an analog signal from which unnecessary out-of-band noise components are appropriately removed in accordance with digital data to be reproduced, a reproduction frequency determination circuit and cutoff frequency selection circuit detect the frequency level of a reproduced signal associated with input digital data and switch an analog LPF to a filter of an appropriate cutoff frequency selected and determined based on the detection result, thereby appropriately removing unnecessary out-of-band noise components from an analog audio signal obtained from the digital data using the filter having the cutoff frequency according to the frequency level of a reproduced signal obtained by reproducing the digital data.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile