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:
Dec. 09, 2014
Filed:
Aug. 08, 2011
Applicant:
Hiroyoshi Yoda, Kawasaki, JP;
Inventor:
Hiroyoshi Yoda, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/308 (2006.01); G01R 31/00 (2006.01); G01R 19/00 (2006.01); H04B 1/16 (2006.01); H03B 1/00 (2006.01); H03L 3/00 (2006.01);
U.S. Cl.
CPC ...
H03L 3/00 (2013.01);
Abstract
A clock supplying device for supplying a clock signal to be used in an operation of a communication apparatus, includes an oscillator for generating the clock signal; a measurement unit for acquiring a reference clock signal extracted from a transmission line connected to the communication apparatus, and measuring a frequency difference between the clock signal and the reference clock signal; and a determiner for determining whether a warm-up operation of the oscillator unit has been completed or not, in accordance with measurement results of the frequency difference and a status of power supplying.