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. 01, 2012
Filed:
Aug. 24, 2007
Applicant:
Shigeki Wada, Tokyo, JP;
Inventor:
Shigeki Wada, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 7/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
An equalizing filter circuit includes a first transmission line in which a plurality of first delay devicesare connected in cascade to input terminal, a second transmission line in which a plurality of second delay devicesare connected in cascade to output terminal, a plurality of weighting circuitsconnected in parallel between the first transmission line and the second transmission line and having a gain which is adjustable by setting coefficients, and variable adjusting circuitarranged at the output side of at least one of weighting circuitsfor correcting a fluctuation of the output characteristics of the weighting circuits.