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Class Information
Number: 333/133
Name: Wave transmission lines and networks > Plural channel systems > Having branched circuits > For providing frequency separation > Utilizing electromechanical transducer
Description: Subject matter wherein an electrical wave driven mechanical vibrator determines the frequency characteristic of the branched circuit.










Patents under this class:
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Patent Number Title Of Patent Date Issued
7378922 Piezoelectric filter May. 27, 2008
7369012 Antenna duplexer May. 6, 2008
7365619 BAW apparatus Apr. 29, 2008
7339445 BAW duplexer without phase shifter Mar. 4, 2008
7332986 Surface acoustic wave apparatus and communications equipment Feb. 19, 2008
7327205 Demultiplexer and surface acoustic wave filter Feb. 5, 2008
7327206 Surface acoustic wave duplexer Feb. 5, 2008
7327209 Piezoelectric thin film resonator Feb. 5, 2008
RE40036 Surface acoustic wave filter Jan. 29, 2008
7310027 Boundary acoustic wave filter Dec. 18, 2007
7304377 Package substrate, integrated circuit apparatus, substrate unit, surface acoustic wave apparatus, and circuit device Dec. 4, 2007
7304551 Branching filter and communication device Dec. 4, 2007
7301420 Piezoelectric resonator filter Nov. 27, 2007
7301421 Surface acoustic wave device, manufacturing method therefor, and communications equipment Nov. 27, 2007
7298230 Duplexer utilizing a compact splitter circuit Nov. 20, 2007
7298231 Surface acoustic wave device and communication apparatus Nov. 20, 2007
7289008 High-frequency module and communication apparatus Oct. 30, 2007
7282383 Micromachine production method Oct. 16, 2007
7283016 Balanced acoustic wave filter and acoustic wave filter Oct. 16, 2007
7276992 Antenna duplexer and electronic device Oct. 2, 2007
7274275 Bandpass filter network and method for bandpass filtering signals using multiple acoustic resonators Sep. 25, 2007
7271684 Filter element, and filter device, duplexer, and high-frequency circuit each including said filter element Sep. 18, 2007
7253702 High-frequency switch module Aug. 7, 2007
7253703 Air-gap type FBAR, method for fabricating the same, and filter and duplexer using the same Aug. 7, 2007
7253704 RF duplexer Aug. 7, 2007
7250831 Filter comprising inductor, duplexer using the filter and fabricating methods thereof Jul. 31, 2007
7242268 Unbalanced-balanced multiband filter module Jul. 10, 2007
7239217 Antenna duplexer Jul. 3, 2007
7233218 Air-gap type FBAR, and duplexer using the FBAR Jun. 19, 2007
7230509 Acoustic mirror Jun. 12, 2007
7230510 Duplexer and method of isolating an Rx-band and a Tx-band Jun. 12, 2007
7230512 Wafer-level surface acoustic wave filter package with temperature-compensating characteristics Jun. 12, 2007
7227429 Surface acoustic wave device and method of fabricating the same Jun. 5, 2007
7224245 Duplexer fabricated with monolithic FBAR and isolation part and a method thereof May. 29, 2007
7215223 Surface acoustic wave device May. 8, 2007
7212080 Surface acoustic wave device having two piezoelectric substrates with different cut angles May. 1, 2007
7212083 Filter device utilizing stacked resonators and acoustic coupling and branching filter using same May. 1, 2007
7196594 Surface acoustic wave duplexer having enhanced isolation performance Mar. 27, 2007
7194241 Efficient multiple-band antenna switching circuit Mar. 20, 2007
7190970 Multiplexer Mar. 13, 2007
7190242 Surface acoustic wave filter and communication unit Mar. 13, 2007
7183878 Surface acoustic wave filter Feb. 27, 2007
7183879 Electric filter, and duplexer using the same Feb. 27, 2007
7180387 Antenna duplexer Feb. 20, 2007
7164306 Composite multiplexer circuit and chip component, high-frequency module and radio communication apparatus using the same Jan. 16, 2007
7155197 High-frequency module and communication apparatus Dec. 26, 2006
7154359 Surface acoustic wave filter and duplexer including the same Dec. 26, 2006
7151310 Package substrate, integrated circuit apparatus, substrate unit, surface acoustic wave apparatus, and circuit device Dec. 19, 2006
7138888 Filter using piezoelectric resonator Nov. 21, 2006
7135944 Branching filter having both saw ladder and dual mode filters, and electronic apparatus using the branching filter Nov. 14, 2006

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