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:
Jan. 02, 1990
Filed:
Jun. 30, 1988
Souichiro Fujioka, Sakai, JP;
Hiroshi Okamoto, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In an apparatus for detecting a rotating speed of a rotating object, in which a pulse train having a frequency proportional to the rotating speed is generated and the rotating speed is detected by detecting the period of the pulse train, the period detection results are over-sampled to form a recursive filter having a peak at the frequency where the frequency characteristic of the period detecting operation becomes zero. As a result, the frequency characteristic of the apparatus as a whole does not have a peak. The phase delay due to the period detecting operation is reduced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile