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:
Sep. 05, 2000
Filed:
Feb. 19, 1998
Applicant:
Inventors:
Kazuo Tanaka, Tokyo, JP;
Hideaki Satoh, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375318 ; 327359 ;
Abstract
A differentiating circuit and a clock generating circuit that do not include unwanted frequency components in a differentiated signal. An inverted signal of an NRZ (Non Return Zero) data signal is delayed by a fixed time in a delay circuit and added to a non inverted signal to generate a differentiated signal. A clock signal is generated by driving a resonator using a rectified signal produced by full wave rectifying the differentiated signal. At this time, resonant components arising due to impedance mismatching are removed by providing a LPF.