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:
Oct. 15, 2002
Filed:
Sep. 06, 2000
Masao Gamo, Takaoka, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A first piezoelectric filter and a second piezoelectric filter are electrically connected to each other with a relay capacitor interposed therebetween. When the thicknesses of the piezoelectric substrate plates of the first and second piezoelectric filters are T and T , respectively, and when the distances between the first main surfaces of the first and second piezoelectric filters and their corresponding adjacent ground electrodes are respectively ta and ta , and when the distances between the second main surfaces of the first and second piezoelectric filters and their corresponding adjacent ground electrodes are respectively tb and tb , the following relationships are satisfied: tb −ta is 0 to 0.1 T , tb −ta is 0 to 0.1 T , alternatively, tb −ta is −0.1 T to 0, tb −ta is 0.1 T to 0.