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. 06, 2005
Filed:
Sep. 04, 2001
Tsugio Ito, Hamamatsu, JP;
Ryuuji Wakatsuki, Hamamatsu, JP;
Tsugio Ito, Hamamatsu, JP;
Ryuuji Wakatsuki, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
Measuring gate pulse is generated that rises in synchronism with one of first and second clock signals and falls in synchronism with the other of the first and second clock signals. Then, a pulse width of the generated measuring gate pulse is measured by counting clock pulses higher in frequency than the first and second clock signals. When counted values indicative of respective pulse widths of an adjacent pair of the measuring gate pulses generated in succession coincide with each other, it is determined that the frequencies of the first and second signal are the same, but when the counted values of the adjacent pair of the measuring gate pulses do not coincide with each other, it is determined that the frequencies of the first and second signal are not the same.