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:
Nov. 13, 2007
Filed:
Jun. 28, 2005
Applicants:
Hiroyuki Kayano, Fujisawa, JP;
Tatsunori Hashimoto, Yokohama, JP;
Inventors:
Hiroyuki Kayano, Fujisawa, JP;
Tatsunori Hashimoto, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01P 1/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A filter circuit includes a plurality of resonators connected in parallel and each having loaded Q deviation equal to allowable deviation of a group delay, a divider to divide an input signal to the resonators, a combiner to combine output signals of the resonators, and an opposite phase unit for making signals passing two resonators of the resonators an approximately opposite phase in an output of the combiner, the two resonators having resonance frequencies adjacent to each other, respectively.