Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2008-07-28
2010-12-07
Takaoka, Dean O (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S101000
Reexamination Certificate
active
07847655
ABSTRACT:
Disclosed is a switch circuit capable of reducing distortion caused by harmonics and preventing an increase in insertion loss even if the number of ports increases. The switching circuit includes one common output port, M first switches having one set of ends connected in common to a first node (M≧2 where M is a constant), N second switches having one set of ends connected in common to the common output port (N≧1 where N is a constant), a third switch having one end connected to the common output port and the other end connected to the first node, M first input ports respectively connected to the other set of ends of the first switches, and N second input ports respectively connected to the other set of ends of the second switches. One selected among the first input ports and the second input ports is connected to the common output port, and if one of the first input ports is selected, the third switch is closed.
REFERENCES:
patent: 7057472 (2006-06-01), Fukamachi et al.
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patent: 7589602 (2009-09-01), Poveda et al.
patent: 2005/0079829 (2005-04-01), Ogawa et al.
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Korean Office Action for application No. 10-2008-0054325, issued on Feb. 22, 2010.
Otani Norihisa
Otobe Eiichiro
Lowe Hauptman & Ham & Berner, LLP
Samsung Electro-Mechanics., Ltd.
Takaoka Dean O
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