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Class Information
Number: 333/190
Name: Wave transmission lines and networks > Coupling networks > Electromechanical filter > Using bulk mode piezoelectric vibrator > Plural coupled vibrators > Lattice structure
Description: Subject matter having four circuit element branches connected in series to form a closed circuit, two nonadjacent junction points serving as input terminals while the remaining two junctions serve as output terminals.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8497747 Microelectromechanical filter formed from parallel-connected lattice networks of contour-mode resonators Jul. 30, 2013
8081049 Band-pass filter device, method of manufacturing same, television tuner, and television receiver Dec. 20, 2011
7961066 Bulk acoustic wave resonator filter Jun. 14, 2011
7920036 Frequency tuning circuit for lattice filter Apr. 5, 2011
7880566 Balanced lattice filter device Feb. 1, 2011
7843285 Piezoelectric thin-film filter Nov. 30, 2010
7825748 Integrable tunable filter circuit comprising a set of BAW resonators Nov. 2, 2010
7741933 Electromagnetic composite metamaterial Jun. 22, 2010
7696844 Filtering circuit fitted with acoustic resonators Apr. 13, 2010
7663451 RF telemetry for an active medical device such as an implant or programmer for an implant Feb. 16, 2010
7616079 Bulk acoustic wave resonator and circuit comprising same Nov. 10, 2009
7492242 Integrable tunable filter circuit comprising a set of BAW resonators Feb. 17, 2009
7479850 Miniaturised half-wave balun Jan. 20, 2009
7436272 Piezoelectric device Oct. 14, 2008
7414497 Piezoelectric thin-film filter Aug. 19, 2008
7319371 Resonator filter structure having equal resonance frequencies Jan. 15, 2008
7248132 Filter structure Jul. 24, 2007
7196596 Film bulk-acoustic resonator filter having unbalanced-balanced input/output structure Mar. 27, 2007
7194247 Dual-channel passband filtering system using acoustic resonators in lattice topology Mar. 20, 2007
7187255 Arrangement of lattice filter Mar. 6, 2007
7057478 Component functioning with bulk acoustic waves having coupled resonators Jun. 6, 2006
6988300 Method of producing a piezoelectric element Jan. 24, 2006
6946772 Saw element, saw device and branching filter Sep. 20, 2005
6870446 High frequency filter Mar. 22, 2005
6859116 Piezoelectric resonator Feb. 22, 2005
6747529 Piezoelectric thin film resonator and frequency variable resonator using the resonator Jun. 8, 2004
6741145 Filter structure and arrangement comprising piezoelectric resonators May. 25, 2004
6741146 Filter structure comprising piezoelectric resonators May. 25, 2004
6670866 Bulk acoustic wave resonator with two piezoelectric layers as balun in filters and duplexers Dec. 30, 2003
6624725 Lattice filter with ripple in passing band eliminated and with passing band widened Sep. 23, 2003
6600390 Differential filters with common mode rejection and broadband rejection Jul. 29, 2003
6542055 Integrated filter balun Apr. 1, 2003
6388544 Method for adjusting the center frequency of a balanced filter and a plurality of balanced filters May. 14, 2002
6278342 Balanced filter structure utilizing bulk acoustic wave resonators having different areas Aug. 21, 2001
6225877 Multilayer type piezoelectric filter with intermediary printed circuit board elements May. 1, 2001
6150903 Piezoelectric filter, its manufacturing method, and intermediate frequency filter Nov. 21, 2000
6121858 Piezoelectric ladder filter with series resonators having a pair of grooves and method of forming same Sep. 19, 2000
5986522 Piezoelectric filter of the ladder type Nov. 16, 1999
5598133 Ladder filter containing piezoresonator with conductive elastic sheet Jan. 28, 1997
5543763 Piezoelectric component for ladder type filter and method of manufacturing thereof Aug. 6, 1996
5332982 Ladder-type electric filter device Jul. 26, 1994
4841264 Ladder-type ceramic filter Jun. 20, 1989
4837533 Ladder-type ceramic filter Jun. 6, 1989
4785270 Monolithic lattice saw filter Nov. 15, 1988
4716377 Piezoelectric resonance component having an improved group delay time characteristic Dec. 29, 1987
4651109 Piezoelectric resonance component having an improved group delay time characteristic Mar. 17, 1987
4398162 Ladder-type piezoelectric filters Aug. 9, 1983
4353045 Ladder type filter Oct. 5, 1982
4323865 Ladder-type piezoelectric filter Apr. 6, 1982
4205284 Electrical frequency filter comprising piezoelectric crystals May. 27, 1980

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