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. 16, 2008
Filed:
Oct. 20, 2006
Kosei Fujisaka, Kyoto, JP;
Tetsuro Sugioka, Kyoto, JP;
Kazuki Adachi, Kyoto, JP;
Kiyomi Kimura, Nara, JP;
Tsuyoshi Takayama, Shiga, JP;
Kosei Fujisaka, Kyoto, JP;
Tetsuro Sugioka, Kyoto, JP;
Kazuki Adachi, Kyoto, JP;
Kiyomi Kimura, Nara, JP;
Tsuyoshi Takayama, Shiga, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a tone output device, an oscillatoroutputs a clockthat is emitted by a crystal resonator. A multiplication circuitoutputs a clockthat is generated by multiplying the clock. A timing control circuitoutputs a timing signalgenerated based on the clockfor operations of a CPU. The CPUoperates in sync with the timing signal. The DA converteroperates in sync with a signal generated based on the clock. The timing adjustment circuitdetects deviation of the clockfrom the clockresulting from frequency jitter of the clock, and prevents occurrence of clock racing.