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:
Mar. 29, 2016
Filed:
Nov. 30, 2008
Fujio Kurokawa, Nagasaki, JP;
Fujio Kurokawa, Nagasaki, JP;
NAGASAKI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Nagasaki-Shi, Nagasaki, JP;
Abstract
Disclosed are a device and a method for comparing a detected frequency signal (first frequency signal) and a second frequency signal which is obtained by delaying the detected frequency, to determine whether the frequency transitioned to a predetermined area on high frequency side or reached a predetermined value on the upward direction side. The frequency detection device () comprises: a delayed signal output circuit () that outputs a second frequency signal (F) obtained by delaying the first frequency signal (F), which has a frequency that changes over time, by a set period (Δi); and a determination circuit (), which inputs the first frequency signal (F) and the second frequency signal (F), determines whether or not the cycle of the first frequency signal (F) is included in the cycle of the second frequency signal (F) and/or whether or not the cycle of the second frequency signal (F) is included in the cycle of the first frequency signal (F), and outputs a determination signal.