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:
Mar. 17, 2015
Filed:
Mar. 15, 2010
Applicants:
Masayuki Takahashi, Minato-ku, JP;
Tomoki Yoshihara, Minato-ku, JP;
Inventors:
Masayuki Takahashi, Minato-ku, JP;
Tomoki Yoshihara, Minato-ku, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 29/00 (2006.01); H03L 7/085 (2006.01); H03L 7/089 (2006.01); H03D 3/24 (2006.01); H03L 7/107 (2006.01); H03L 7/093 (2006.01);
U.S. Cl.
CPC ...
H03L 7/1075 (2013.01); H03L 7/093 (2013.01);
Abstract
In order to provide a circuit which can realize high-speed frequency tracking performance while satisfying jitter/wander suppression performance, the circuit controls loop gain of a PLL means, which extracts a clock signal of a SDH signal or an Ethernet signal from an OTN signal, on the basis of a result of processing a jitter/wander component and a frequency change state on the basis of phase comparison data of the PLL means.