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:
Aug. 11, 2009
Filed:
Jan. 12, 2009
Ushio Sangawa, Nara, JP;
Ushio Sangawa, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The connection topology of input terminals (), elements (and) and load () is designed similarly to a 'seven-segment display' that is often used to display numerals on a calculator or a digital watch. Specifically, suppose in the three horizontally running segments of the seven-segment display, the top and bottom ones are associated with the input terminals () and the load () is allocated to the other horizontal one. Then, the other four vertical segments are associated with the elements (and), which may be an inductor with an inductance of 2.521 nH, an inductor with an inductance of 76.157 nH, an inductor with an inductance of 1.907 nH, and a capacitor with a capacitance of 1.429 pF, respectively. By adopting this circuit configuration, the total number of elements can be reduced to four and the loss can be reduced significantly. Since the resonant circuits can be eliminated and the size of the ladder circuit can be reduced, impedance matching is achieved with a high degree of stability in spite of a variation in the impedance of the load ().