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:
Apr. 13, 2010
Filed:
Sep. 09, 2005
Shigeki Wada, Tokyo, JP;
Yasuyuki Suzuki, Tokyo, JP;
Shigeki Wada, Tokyo, JP;
Yasuyuki Suzuki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In an equalizing filter circuit having an input terminal, an output terminal, delay devicesconnected in multi-stage to the input terminal, and a plurality of weighting circuitswhich are branched from and connected to the plurality of delay devices to thereby combine respective output signals of the weighting circuits, gain adjustment of the weighting circuits is performed to determine a coefficient of the equalizing filter circuit without depending on a load connected to the output terminal. Thus, an amount of compensation for a distorted waveform may be enhanced. To this end, an impedance converting circuitis connected between at least one weighting circuit and the output terminal.