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:
Nov. 25, 2003
Filed:
Jul. 29, 2002
Tamotsu Mizuno, Chita-gun, JP;
Takamoto Watanabe, Nagoya, JP;
Denso Corporation, Kariya, JP;
Abstract
In an A/D conversion apparatus comprising an A/D converter ( ) and a digital moving average filter ( ) for removing high-frequency signal components, there is provided an analog moving average filter ( ) at a first stage. A sampling frequency of the filters ( and ) is set to fsd=n×fsa (where n is a positive integer of 1, 2, ---). As a result, it becomes possible to superimpose an unnecessary signal passing area that appears at every frequency of n times the sampling frequency fsd in the filter ( ), on an area of infinite attenuation that appears at every frequency of n times the sampling frequency fsa in the filter ( ). In the apparatus as a whole, it becomes possible to efficiently attenuate unnecessary high-frequency signal components. It is also possible to obtain a similar effect when a time A/D converter is used in place of the analog moving average filter ( ) and the A/D converter ( ).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile