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:
Aug. 05, 2003
Filed:
Oct. 16, 2000
Nobusuke Yamaoka, Chiba, JP;
Ichiro Okamoto, Tokyo, JP;
Takehiko Saito, Kanagawa, JP;
Yasutaka Kotani, Tokyo, JP;
Kenji Nikata, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
There are provided the delay coarse adjustment circuit , the delay fine adjustment circuit , and the inverter circuit . The delay coarse adjustment circuit stepwise varies a delay amount based on the delay coarse adjustment signal S and supplies the input oscillation signal S with a coarse delay. The delay fine adjustment circuit stepwise varies a delay amount based on the delay fine adjustment signal S and supplies the input oscillation signal S with a fine delay which is smaller than a delay amount supplied by the delay coarse adjustment circuit . The inverter circuit inputs the oscillation signal S from the delay coarse adjustment circuit or the delay fine adjustment circuit . The delay coarse adjustment circuit coarsely adjusts delays. The delay fine adjustment circuit fine adjusts delays. The coarse and fine adjustments provide a precision delay to generate the oscillation output signal S . The delay coarse adjustment circuit , the delay fine adjustment circuit , and the inverter circuit are connected in a ring for stepwise controlling an oscillation signal's oscillation frequency.