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. 15, 2001
Filed:
May. 08, 1998
Applicant:
Inventor:
Masaaki Itoh, Tokyo, JP;
Assignee:
NEC Coporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D 3/24 ; H03L 7/06 ; H03L 7/00 ;
U.S. Cl.
CPC ...
H03D 3/24 ; H03L 7/06 ; H03L 7/00 ;
Abstract
A destuff circuit using a complete secondary system DPLL enables a DPLL circuit applicable to PDH low speed signal interface unit of a transmission communication apparatus to be shared. A switching signal from a selector causes a primary random walk filter, a secondary random walk filter, and counter number of a Q counter to be changed, and also causes the rate length of a rate multiplier to be changed, thereby providing a required DPLL circuit for a respective PDH low speed signal interface.