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:
Jun. 23, 2009
Filed:
May. 12, 2006
Takeshi Ikeda, Tokyo, JP;
Hiroshi Miyagi, Kanagawa, JP;
Takeshi Ikeda, Tokyo, JP;
Hiroshi Miyagi, Kanagawa, JP;
Niigata Seimitsu Co., Ltd., Jyoetsu-shi, JP;
Abstract
A couple of frequency doubler circuitsandwhich multiplys a frequency of a reference oscillation signal outputted from a reference oscillatoris provided, thereby a frequency of a reference oscillation signal, as the greatest common divisor between a frequency (300 KHz) determined by multiplying the frequency (fx=75 KHz) of a crystal oscillatorby four and a frequency (54 KHz) determined by multiplying an assigned frequency per one channel in AM radio broadcasting by a prescribed divide ratio, can be higher than a conventional frequency. This way realizes the decrease of a divide ratio in a programmable counter, resulting in the reduction of the circuit scale, shortening of the lock-up time, and improvement of the S/N ratio.