EP 0971434 A1 20000112 - Composite switch circuit and composite switch device
Title (en)
Composite switch circuit and composite switch device
Title (de)
Zusammengesetzter Schaltkreis und Schaltgerät dazu
Title (fr)
Circuit de commutation composé et dispositif de commutation composé
Publication
Application
Priority
EP 98112502 A 19980706
Abstract (en)
A composite switch circuit (30) for alternately and electrically connecting a first circuit (Tx) to a third circuit (ANT) or a second circuit (Rx) to said third circuit (ANT). The composite switch circuit (30) is incorporated with a low pass filter circuit (LPF) in the switch circuit portion of the composite switch circuit (30) so as to create a highly symmetrical circuit configuration. The composite switch circuit (30) is disposed on a plurality of dielectric substrates (22-28) of a integral multi-layer body (2) to provide a miniaturised composite switch device. Since the composite switch device including the composite switch circuit (30) with a symmetrical circuit configuration shows a low insertion loss and a high performance in a broad frequency range, the composite switch device is advantageously used to form a portion of a radio transceiver such as a cellular radiotelephone. <IMAGE>
IPC 1-7
IPC 8 full level
H01P 1/15 (2006.01)
CPC (source: EP)
H01P 1/15 (2013.01)
Citation (search report)
- [A] EP 0784384 A1 19970716 - TDK CORP [JP]
- [DA] EP 0785590 A1 19970723 - MURATA MANUFACTURING CO [JP]
- [A] MANDAI H ET AL: "ADVANCED MULTI-LAYER CERAMIC SURFACE-MOUNT FUNCTIONAL COMPONENTS FOR TELECOMMUNICATIONS EQUIPMENT", PROCEEDINGS OF THE ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE, LAS VEGAS, MAY 21 - 24, 1995, no. CONF. 45, 21 May 1995 (1995-05-21), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 247 - 250, XP002029547
Designated contracting state (EPC)
DE DK ES FI FR GB NL SE
DOCDB simple family (publication)
EP 0971434 A1 20000112; EP 0971434 B1 20070530; CN 1545215 A 20041110; CN 1545215 B 20100811; DE 69837841 D1 20070712; DE 69837841 T2 20080124; ES 2287964 T3 20071216
DOCDB simple family (application)
EP 98112502 A 19980706; CN 200410044632 A 19980720; DE 69837841 T 19980706; ES 98112502 T 19980706