发明公开
- 专利标题： FILTER DEVICE
- 专利标题（中）： FILTERVORRICHTUNG
-
申请号： EP07832108申请日： 2007-11-19
-
公开(公告)号： EP2106023A4公开(公告)日： 2010-02-03
- 发明人: YAMAKAWA TAKEHIKO , OKAJIMA TOSHIYUKI , NAKATSUKA HIROSHI , ONISHI KEIJI
- 申请人： PANASONIC CORP
- 专利权人： PANASONIC CORP
- 当前专利权人： PANASONIC CORP
- 优先权： JP2006312591 2006-11-20; JP2006312593 2006-11-20
- 主分类号： H03H7/01
- IPC分类号： H03H7/01 ; H04B1/18
摘要：
A high frequency filter includes an inductor (2), a serial resonance circuit (31) including an inductor (3a) and capacitors (4a and 5a), a serial resonance circuit (32) including an inductor (3b) and capacitors (4b and 5b), and a varactor diode (6) connected between a connection point between the capacitor (4a) and the capacitor (5a) and a connection point between the capacitor (4b) and the capacitor (5b). A controller (1) simultaneously changes two attenuation pole frequencies of the filter device by changing a capacitance of the varactor diode (6).
信息查询
