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:
May. 07, 2013
Filed:
Aug. 24, 2009
Applicant:
Takashi Michiyoshi, Osaka, JP;
Inventor:
Takashi Michiyoshi, Osaka, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/085 (2006.01);
U.S. Cl.
CPC ...
Abstract
The oscillating circuit () includes a variable frequency oscillating circuit () for generating a clock signal (CK) whose frequency increases in response to an up-signal (UP) and decreases in response to a down-signal (DOWN), the frequency going up and down continuously between an upper-limit frequency and a lower-limit frequency. An up/down control circuit () outputs the down-signal when a duration of a low level of the clock signal drops below a first delay time and outputs the up-signal when the duration exceeds a second delay time longer than the first delay time.