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| Number | Title | Issue Date |
| 8188811 | Filtering circuit with coupled acoustic resonators A filter with coupled resonator having a substrate; an acoustic mirror intended to support acoustic resonators, and to isolate these resonators from the substrate; a first structure with an upper resonator and a lower resonator coupled to one another through at leas... | 05/29/2012 |
| 8018304 | Device and method for cascading filters of different materials Some embodiments of the invention provide a filter having at least one first filter, each first filter being a band-reject type filter having a first set of filter parameters that are a function of a first material used to fabricate the at least one first filter, an... | 09/13/2011 |
| 8018303 | Bulk acoustic wave device An apparatus includes a stacked crystal filter and a bulk acoustic wave resonator, which are acoustically coupled. ... | 09/13/2011 |
| 7973620 | Power amplifier filter for radio-frequency signals A power amplifier filter for radio-frequency signals having an outphasing type architecture comprising a first stage (2) capable of generating, from an input signal s(t), two signals s1(t), s2(t) having an identical amplitude but phase s... | 07/05/2011 |
| 7961066 | Bulk acoustic wave resonator filter The invention relates to a filter operating with bulk acoustic waves, comprising at least one first resonator and at least one second resonator. In the at least one first and second resonator, a longitudinal acoustic mode is capable of propagation, for which normal ... | 06/14/2011 |
| 7956705 | Circuit working with acoustic volume waves and component connected to the circuit The invention relates to a circuit operating with bulk acoustic waves with at least electroacoustic systems, each arranged in a branch (Z1, Z2, Z3, Z4), wherein each electroacoustic system comprises at least two series-connected resonator... | 06/07/2011 |
| 7864002 | Filter device with balanced signal input and output terminals A filter device has a novel structure, satisfying requirements to have balanced input and output, with a small number of configuration elements. The above filter device includes first and second balanced signal terminals on the input side to be connected to an exter... | 01/04/2011 |
| 7825749 | Integrated coupled resonator filter and bulk acoustic wave devices A method for manufacturing a filter device is provided. The filter device comprises a coupled resonator at a first site, a shunt resonator at a second site and a series resonator at a third site, the coupled resonator comprising a first and a second resonator. The m... | 11/02/2010 |
| 7804383 | Coupled lamb wave resonators filter A coupled Lamb wave resonator filter includes first and second Lamb wave resonators. The first Lamb wave resonator includes a first resonant layer, and first and second electrodes on opposite sides of the first resonant layer. The second Lamb wave resonator includes... | 09/28/2010 |
| 7791435 | Single stack coupled resonators having differential output A coupled acoustic resonator adapted for single-ended input to differential output signal transformation, comprises a single stack. The single stack comprises: a first film bulk acoustic resonator (FBAR) comprising a single-ended input; a second FBAR disposed over t... | 09/07/2010 |
| 7786826 | Apparatus with acoustically coupled BAW resonators and a method for matching impedances An apparatus includes a first bulk acoustic wave (BAW) device including a first impedance and a second BAW device including a second impedance, wherein the first and second impedances are different and the first and second BAW devices are acoustically coupled. ... | 08/31/2010 |
| 7786825 | Bulk acoustic wave device with coupled resonators A bulk acoustic wave device includes first and second resonators, which are acoustically coupled and electrically connected in parallel. ... | 08/31/2010 |
| 7777597 | Band reject filters Band reject filters are disclosed. A band reject filter includes a first acoustic resonator and a second acoustic resonator, each of which has either shunt resonators adapted to resonate substantially at respective resonance frequencies defining a rejection frequenc... | 08/17/2010 |
| 7737807 | Acoustic galvanic isolator incorporating series-connected decoupled stacked bulk acoustic resonators Embodiments of the acoustic galvanic isolator comprise a carrier signal source, a modulator connected to receive an information signal and the carrier signal, a demodulator, and an electrically-isolating acoustic coupler connected between the modulator and the demod... | 06/15/2010 |
| 7728696 | Harmonic termination of power amplifiers using BAW filter output matching circuits A system, apparatus and method for providing filtering functionality and impedance transformation within a BAW resonator network are disclosed. In particular, a BAW resonator network is designed to provide bandpass capability and a transformation between its input i... | 06/01/2010 |
| 7719390 | Dual mode piezoelectric filter, method of manufacturing the same, high frequency circuit component and communication device using the same A dual mode piezoelectric filter includes a piezoelectric material layer composed of a piezoelectric thin film of the high-cut type formed on a substrate, a first electrode and a second electrode formed on one of the major surfaces of the piezoelectric material laye... | 05/18/2010 |
| 7675390 | Acoustic galvanic isolator incorporating single decoupled stacked bulk acoustic resonator Embodiments of the acoustic galvanic isolator comprise a carrier signal source, a modulator connected to receive an information signal and the carrier signal, a demodulator, and an electrically-isolating acoustic coupler connected between the modulator and the demod... | 03/09/2010 |
| 7646265 | BAW resonator filter bandwidth and out-of-band frequency rejection Embodiments of the present invention provide systems, devices and methods for improving both the bandwidth of a BAW resonator bandpass filter and the suppression of out-of-band frequencies above the passband. In various embodiments of the invention, blocker inductor... | 01/12/2010 |
| 7636027 | Piezoelectric resonator and piezoelectric thin-film filter A piezoelectric resonator and a piezoelectric thin-film filter including the piezoelectric resonator. The piezoelectric resonator includes a piezoelectric layer disposed between a pair of conductive layers to form a vibrating region. Outer edges of the vibrating reg... | 12/22/2009 |
| 7636026 | Bulk acoustic wave resonator and filter A bulk acoustic wave resonator includes an acoustically active area where an acoustic wave is excitable, and a transition area adjacent to an outside edge of the acoustically active area. A critical frequency of the acoustic wave in the transition area differs from ... | 12/22/2009 |
| 7629865 | Piezoelectric resonator structures and electrical filters Film bulk acoustic resonators (FBARs) stacked FBARs (SBARS) including at least two curved edges are disclosed. ... | 12/08/2009 |
| 7619494 | Ladder type piezoelectric filter In a ladder-type piezoelectric filter, the attenuation in the stop bands on a low frequency side and a high frequency side are increased while the pass band is widened. The ladder-type piezoelectric filter is made up by alternately connecting parallel arms and serie... | 11/17/2009 |
| 7616079 | Bulk acoustic wave resonator and circuit comprising same The invention relates to a resonator operating with bulk acoustic waves (BAW resonator, BAW=Bulk Acoustic Wave) and band-pass filters constructed of such resonators. To increase the edge steepness of the transmission band of a BAW band-pass filter, the invention pro... | 11/10/2009 |
| 7612636 | Impedance transforming bulk acoustic wave baluns A bulk acoustic wave device includes an acoustic decoupler between first and second film bulk acoustic resonators (FBARs). The first FBAR is resonant at a resonant frequency of the device and includes first and second planar electrodes abutting opposite sides of a f... | 11/03/2009 |
| 7598827 | Harmonic termination of power amplifiers using BAW filter output matching circuits A system, apparatus and method for providing filtering functionality and impedance transformation within a BAW resonator network are disclosed. In particular, a BAW resonator network is designed to provide bandpass capability and a transformation between its input i... | 10/06/2009 |
| 7586392 | Dual path acoustic data coupling system and method A data coupler includes first and second acoustic isolation transformers that develop first and second isolated output signals in response to first and second modulated input signals. A first and a second transmitter is coupled to the first and second acoustic isola... | 09/08/2009 |
| 7557677 | Cascaded monolithic crystal filter with high out-of-band rejection In one embodiment, a cascaded monolithic crystal filter is provided. A first filter includes two resonators having a pair of electrodes with the monolithic crystal between. At least one electrode has a periphery which includes a feature capable of shifting a frequen... | 07/07/2009 |
| 7548140 | Bulk acoustic wave (BAW) filter having reduced second harmonic generation and method of reducing second harmonic generation in a BAW filter In a filter having a half-ladder structure comprising an alternating series of series branches and shunt branches, including a signal input and a signal output related to a common ground, at least one series branch or one parallel branch of the filter is configured ... | 06/16/2009 |
| 7535323 | Bulk acoustic wave filter with reduced nonlinear signal distortion A filter circuit includes at least one series resonator having a first terminal and a second terminal, where the first and second terminals of the at least one series resonator are coupled to an input and an output of the filter circuit, respectively. The filter cir... | 05/19/2009 |
| 7535322 | Monolithic RF filter A filter formed of film bulk acoustic resonators has a topology that enables a trimming inductor to be fabricated on the same substrate as the resonator arrays. The entire filter can be fabricated on a single chip, utilizing only integrated circuit processes. In an ... | 05/19/2009 |
| 7535324 | Piezoelectric resonator structure and method for manufacturing a coupled resonator device A method for manufacturing a coupled resonator device includes forming a first part of a plurality of layers, trimming an exposed layer of the first part and forming a remaining part of the plurality of layers. The coupled resonator device includes a stack of the pl... | 05/19/2009 |
| 7525400 | Band pass filtering circuit fitted with acoustic resonators A band pass filtering circuit based on a quadripole includes a serial branch having a first acoustic resonator presenting a frequency of resonance and a frequency of anti-resonance and mounted in serial with a first capacitor; a parallel branch having a second acous... | 04/28/2009 |
| 7525399 | Thin-film piezoelectric resonator, filter and voltage-controlled oscillator A thin-film piezoelectric resonator includes a substrate, and first and second excitation portions. The substrate includes first and second cavities. The first excitation portion is disposed over the first cavity, and includes a first electrode, a first piezoelectri... | 04/28/2009 |
| 7525398 | Acoustically communicating data signals across an electrical isolation barrier In one aspect, a data communication system includes a modulator, an integrated acoustic data coupler, and a demodulator. The modulator modulates a carrier signal having a frequency in an operating frequency range in response to an input data signal and provides the ... | 04/28/2009 |
| 7508286 | HBAR oscillator and method of manufacture An oscillator comprises a substrate and a high tone bulk acoustic resonator (HBAR), which includes a portion of the substrate. The oscillator also comprises a film bulk acoustic resonator (FBAR) filter disposed over the substrate. The filter comprises a plurality of... | 03/24/2009 |
| 7498904 | Piezoelectric thin film resonator and devices provided with the same A piezoelectric thin film resonator includes a substrate in which a cavity is formed, a first electrode having a first electrode edge and partly spanning the cavity on the substrate; a piezoelectric layer placed on the first electrode, a second electrode having a se... | 03/03/2009 |
| 7492242 | Integrable tunable filter circuit comprising a set of BAW resonators A tunable filter circuit having inputs IN1-IN2 and outputs OUT1-OUT2, comprising at least a primary four-pole circuit including in cascade: a first varactor having a first electrode connected to IN1 and a second electrode; a first ... | 02/17/2009 |
| 7492241 | Contour-mode piezoelectric micromechanical resonators A contour mode micromechanical piezoelectric resonator. The resonator has a bottom electrode; a top electrode; and a piezoelectric layer disposed between the bottom electrode and the top electrode. The piezoelectric resonator has a planar surface with a cantilevered... | 02/17/2009 |
| 7479851 | Piezoelectric component and method for producing it A piezoelectric component comprises at least two stacked crystal filters on a substrate. Each stacked crystal filter comprises a bottom electrode, a first piezoelectric layer arranged above the bottom electrode, a central electrode arranged above the first piezoelec... | 01/20/2009 |
| 7479850 | Miniaturised half-wave balun A miniaturised half-wave balun comprises a single-ended I/O port comprising a first signal carrying terminal for connection to a source impedance and a differential I/O port comprising second and third signal carrying terminals for connection to a load impedance. Fi... | 01/20/2009 |
