Patents Examined by Barbara Summons
  • Patent number: 11005450
    Abstract: A filter circuit includes a first input node and a second input node for receiving an input signal, and a first output node and a second output node for providing an output signal. A first series acoustic resonator is coupled in series between the first input node and the first output node. At least one coupled resonator filter (CRF) includes first and second transducers, which may be acoustically coupled to one another. The first transducer has a first electrode coupled to the first input node, a second electrode coupled to the second input node, and a first piezoelectric layer between the first electrode and the second electrode. A second transducer has a third electrode coupled to the first output node, a fourth electrode coupled to the second output node, and a second piezoelectric layer between the third electrode and the fourth electrode.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: May 11, 2021
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Robert Aigner
  • Patent number: 10992284
    Abstract: Acoustic filters and methods are disclosed. A single-crystal piezoelectric is attached to a substrate, portions of the piezoelectric plate forming one or more diaphragms spanning respective cavities in the substrate. A conductor pattern is formed on the piezoelectric plate, the conductor pattern including a plurality of interdigital transducers (IDTs) of a plurality of resonators, interleaved fingers of each of the plurality of IDTs disposed on a respective diaphragm of the one or more diaphragms. A first frequency setting dielectric layer having a first thickness is disposed over the fingers of the IDTs of a first subset of the plurality of resonators. A second frequency setting dielectric layer having a second thickness greater than the first thickness is disposed over the fingers of the IDTs of a second subset of the plurality of resonators, wherein the first subset and the second subset are not identical.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: April 27, 2021
    Assignee: Resonant Inc.
    Inventor: Ventsislav Yantchev
  • Patent number: 10985732
    Abstract: An RF circuit device using modified lattice, lattice, and ladder circuit topologies. The devices can include four resonator devices and four shunt resonator devices. In the ladder topology, the resonator devices are connected in series from an input port to an output port while shunt resonator devices are coupled the nodes between the resonator devices. In the lattice topology, a top and a bottom serial configurations each includes a pair of resonator devices that are coupled to differential input and output ports. A pair of shunt resonators is cross-coupled between each pair of a top serial configuration resonator and a bottom serial configuration resonator. The modified lattice topology adds baluns or inductor devices between top and bottom nodes of the top and bottom serial configurations of the lattice configuration. These topologies may be applied using single crystal or polycrystalline bulk acoustic wave (BAW) resonators.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: April 20, 2021
    Assignee: AKOUSTIS, INC.
    Inventors: Jeffrey B. Shealy, Rohan W. Houlden, Shawn R. Gibb, Mary Winters, Ramakrishna Vetury
  • Patent number: 10979026
    Abstract: An RF circuit device using modified lattice, lattice, and ladder circuit topologies. The devices can include four resonator devices and four shunt resonator devices. In the ladder topology, the resonator devices are connected in series from an input port to an output port while shunt resonator devices are coupled the nodes between the resonator devices. In the lattice topology, a top and a bottom serial configurations each includes a pair of resonator devices that are coupled to differential input and output ports. A pair of shunt resonators is cross-coupled between each pair of a top serial configuration resonator and a bottom serial configuration resonator. The modified lattice topology adds baluns or inductor devices between top and bottom nodes of the top and bottom serial configurations of the lattice configuration. These topologies may be applied using single crystal or polycrystalline bulk acoustic wave (BAW) resonators.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: April 13, 2021
    Assignee: Akoustis, Inc.
    Inventors: Rohan W. Houlden, Jeffrey B. Shealy, David M. Aichele
  • Patent number: 10979022
    Abstract: An RF circuit device using modified lattice, lattice, and ladder circuit topologies. The devices can include four resonator devices and four shunt resonator devices. In the ladder topology, the resonator devices are connected in series from an input port to an output port while shunt resonator devices are coupled the nodes between the resonator devices. In the lattice topology, a top and a bottom serial configurations each includes a pair of resonator devices that are coupled to differential input and output ports. A pair of shunt resonators is cross-coupled between each pair of a top serial configuration resonator and a bottom serial configuration resonator. The modified lattice topology adds baluns or inductor devices between top and bottom nodes of the top and bottom serial configurations of the lattice configuration. These topologies may be applied using single crystal or polycrystalline bulk acoustic wave (BAW) resonators.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: April 13, 2021
    Assignee: Akoustis, Inc.
    Inventors: Jeffrey B. Shealy, Michael Hodge, Rohan W. Houlden, Shawn R. Gibb, Mary Winters, Ramakrishna Vetury, David Aichele
  • Patent number: 10979027
    Abstract: A variable filter includes a serial arm resonator and a parallel arm resonance circuit, the parallel arm resonance circuit includes a parallel arm resonator and a capacitance element connected to the parallel arm resonator, the serial arm resonator and the parallel arm resonator respectively include IDT electrodes each formed of a plurality of electrode fingers formed on a substrate, and a film thickness of the plurality of electrode fingers of the parallel arm resonator is larger than a film thickness of the plurality of electrode fingers of the serial arm resonator.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: April 13, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Koji Nosaka
  • Patent number: 10979024
    Abstract: An RF circuit device using modified lattice, lattice, and ladder circuit topologies. The devices can include four resonator devices and four shunt resonator devices. In the ladder topology, the resonator devices are connected in series from an input port to an output port while shunt resonator devices are coupled the nodes between the resonator devices. In the lattice topology, a top and a bottom serial configurations each includes a pair of resonator devices that are coupled to differential input and output ports. A pair of shunt resonators is cross-coupled between each pair of a top serial configuration resonator and a bottom serial configuration resonator. The modified lattice topology adds baluns or inductor devices between top and bottom nodes of the top and bottom serial configurations of the lattice configuration. These topologies may be applied using single crystal or polycrystalline bulk acoustic wave (BAW) resonators.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: April 13, 2021
    Assignee: AKOUSTIS, INC.
    Inventors: Jeffrey B. Shealy, Rohan W. Houlden, Shawn R. Gibb, David M. Aichele
  • Patent number: 10979023
    Abstract: An RF circuit device using modified lattice, lattice, and ladder circuit topologies. The devices can include four resonator devices and four shunt resonator devices. In the ladder topology, the resonator devices are connected in series from an input port to an output port while shunt resonator devices are coupled the nodes between the resonator devices. In the lattice topology, a top and a bottom serial configurations each includes a pair of resonator devices that are coupled to differential input and output ports. A pair of shunt resonators is cross-coupled between each pair of a top serial configuration resonator and a bottom serial configuration resonator. The modified lattice topology adds baluns or inductor devices between top and bottom nodes of the top and bottom serial configurations of the lattice configuration. These topologies may be applied using single crystal or polycrystalline bulk acoustic wave (BAW) resonators.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: April 13, 2021
    Assignee: AKOUSTIS, INC.
    Inventors: Jeffrey B. Shealy, Rohan W. Houlden, Shawn R. Gibb, Mary Winters, Ramakrishna Vetury
  • Patent number: 10979025
    Abstract: An RF circuit device using modified lattice, lattice, and ladder circuit topologies. The devices can include four resonator devices and four shunt resonator devices. In the ladder topology, the resonator devices are connected in series from an input port to an output port while shunt resonator devices are coupled the nodes between the resonator devices. In the lattice topology, a top and a bottom serial configurations each includes a pair of resonator devices that are coupled to differential input and output ports. A pair of shunt resonators is cross-coupled between each pair of a top serial configuration resonator and a bottom serial configuration resonator. The modified lattice topology adds baluns or inductor devices between top and bottom nodes of the top and bottom serial configurations of the lattice configuration. These topologies may be applied using single crystal or polycrystalline bulk acoustic wave (BAW) resonators.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: April 13, 2021
    Assignee: Akoustis, Inc.
    Inventors: Rohan W. Houlden, Jeffrey B. Shealy, Shawn R. Gibb, David Aichele
  • Patent number: 10972070
    Abstract: An elastic wave device includes a piezoelectric substrate, and elastic wave elements on the piezoelectric substrate and including IDT electrodes, respectively. The IDT electrode of a first of the elastic wave elements includes first and second busbars, and the IDT electrode of a second of the elastic wave elements includes third and fourth busbars. The second busbar and the third busbar extend parallel or substantially parallel to each other, and are spaced by a gap in a direction perpendicular or substantially perpendicular to an elastic-wave propagating direction. Each of the second and third busbars includes first and second electrode layers at least a portion of which is laminated on the first electrode layer. The second electrode layer of the second busbar is cut in at least one location in a direction crossing the elastic-wave propagating direction.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: April 6, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yoshinori Kameoka
  • Patent number: 10958242
    Abstract: A filter includes a series arm resonator, a first parallel arm resonance circuit, and a second parallel arm resonance circuit. The first parallel arm resonance circuit includes: a first parallel arm resonator connected to a first node; a first capacitor and a first switch connected together in parallel and connected in series with the first parallel arm resonator; and a first inductor provided on a path connecting the node and ground to each other via the first switch. The second parallel arm resonance circuit includes: a second parallel arm resonator connected to a second node; a second capacitor and a second switch connected together in parallel and connected in series with the second parallel arm resonator; and a second inductor provided on a path connecting the second node and ground to each other via the second switch. The first and second inductor have different inductance values.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: March 23, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hideki Tsukamoto, Koji Nosaka
  • Patent number: 10958245
    Abstract: A filter circuit includes a first input node and a second input node for receiving an input signal, and a first output node and a second output node for providing an output signal. A first series acoustic resonator is coupled in series between the first input node and the first output node. At least one coupled resonator filter (CRF) includes first and second transducers, which may be acoustically coupled to one another. The first transducer has a first electrode coupled to the first input node, a second electrode coupled to the second input node, and a first piezoelectric layer between the first electrode and the second electrode. A second transducer has a third electrode coupled to the first output node, a fourth electrode coupled to the second output node, and a second piezoelectric layer between the third electrode and the fourth electrode.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: March 23, 2021
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Robert Aigner
  • Patent number: 10951192
    Abstract: An elastic wave device includes a piezoelectric substrate and an interdigital transducer electrode on the piezoelectric substrate, the piezoelectric substrate including a piezoelectric layer and a high-acoustic-velocity member layer, the piezoelectric layer being stacked on the high-acoustic-velocity member layer. The piezoelectric layer is made of lithium tantalate. Denoting an elastic wave propagation direction as a first direction, and a direction perpendicular or substantially perpendicular to the first direction as a second direction, a central region, low-acoustic-velocity regions, and high-acoustic-velocity regions are provided in the interdigital transducer electrode in the second direction. The low-acoustic-velocity regions include mass-adding films on electrode fingers.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: March 16, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Mari Saji, Hideki Iwamoto
  • Patent number: 10944381
    Abstract: A filter includes a series arm resonator, a first parallel arm resonance circuit and a second parallel arm resonance circuit. The each of the first parallel arm resonance circuit and the second parallel arm resonance circuit includes: a parallel arm resonator that is connected to a node; a pair of elements consisting of a capacitor and a switch, which are connected in parallel with each other, that is connected in series with the parallel arm resonator; and an inductor that is provided on a path that connects the node and ground to each other via the switch. The inductance value of the inductor of the first parallel arm resonance circuit and the inductance value of the inductor of the second parallel arm resonance circuit are substantially equal to each other.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: March 9, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hideki Tsukamoto, Koji Nosaka
  • Patent number: 10944379
    Abstract: An integrated radio frequency (RF) circuit combines complementary features of passive devices and acoustic filters and includes a first die, a second die, and a third die. The first die includes a substrate having one or more passive devices. The second die includes a first acoustic filter. The second die is stacked and coupled to a first surface of the first die. The third die includes a second acoustic filter. The third die is stacked and coupled to a second surface opposite the first surface of the first die.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: March 9, 2021
    Assignee: Qualcomm Incorporated
    Inventors: David Francis Berdy, Changhan Hobie Yun, Shiqun Gu, Niranjan Sunil Mudakatte, Mario Francisco Velez, Chengjie Zuo, Jonghae Kim
  • Patent number: 10931263
    Abstract: Filter circuits having a resonator-based filter and a magnetically-coupled filter are disclosed. A filter circuit is deployed with a resonator-based passband filter connected to a magnetically-coupled filter which mitigates or reduces flyback of the resonator-based filter. The magnetically-coupled filter can be a passband filter with a relatively low insertion loss. The magnetically-coupled filter can be designed to mitigate flyback of the resonator-based filter by attenuating frequency response at selected frequency ranges.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: February 23, 2021
    Assignee: Qorvo US, Inc.
    Inventors: Jeffrey D. Galipeau, Lawrence A. Carastro, Jeff Dekosky
  • Patent number: 10917070
    Abstract: Filter devices and methods of fabrication are disclosed. A filter device includes a piezoelectric plate attached to a substrate, portions of the piezoelectric plate forming diaphragms spanning respective cavities in the substrate. A conductor pattern formed on a surface of the piezoelectric plate includes a plurality of interdigital transducers (IDTs) of a respective plurality of acoustic resonators including a shunt resonator and a series resonator, interleaved fingers of each of the plurality of IDTs disposed on one of the diaphragms. Radio frequency signals applied to the IDTs excite respective primary shear acoustic modes in the respective diaphragms. A thickness of a first dielectric layer disposed on the front surface between the fingers of the IDT of the shunt resonator is greater than a thickness of a second dielectric layer disposed on the front surface between the fingers of the IDT of the series resonator.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: February 9, 2021
    Assignee: Resonant Inc.
    Inventors: Viktor Plesski, Soumya Yandrapalli, Robert B. Hammond, Bryant Garcia, Patrick Turner, Jesson John, Ventsislav Yantchev
  • Patent number: 10911019
    Abstract: A multiplexer includes: a substrate having a surface; another substrate having another surface facing the surface across an air gap; a filter that is located on the surface, and includes first series resonators in a first series pathway from a common terminal to a terminal, and first parallel resonators in first parallel pathways; another filter that is located on the another surface, and includes second series resonators in a second series pathway from the common terminal to another terminal, and second parallel resonators in second parallel pathways, a second parallel resonator closest to the another terminal and a second series resonator closest to the another terminal not overlapping with the first series pathway, at least a part of the second parallel pathways overlapping with at least a part of first pathways between the first series pathway and the first parallel resonators, the first parallel resonators, and the first series pathway.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: February 2, 2021
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Fumiaki Isaka, Yasuhisa Okamoto, Takuma Kuroyanagi
  • Patent number: 10911023
    Abstract: Acoustic resonator devices and methods are disclosed. An acoustic resonator device includes a substrate having a surface and a single-crystal piezoelectric plate having front and back surfaces. An aluminum oxide etch-stop layer is sandwiched between the surface of the substrate and the back surface of the piezoelectric plate, a portion of the piezoelectric plate and the etch-stop layer forming a diaphragm spanning a cavity in the substrate. An interdigital transducer (IDT) is formed on the front surface of the single-crystal piezoelectric plate with interleaved fingers of the IDT disposed on the diaphragm. The aluminum oxide etch-stop layer is impervious to an etch process used to form the cavity.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: February 2, 2021
    Assignee: Resonant Inc.
    Inventor: Patrick Turner
  • Patent number: 10886886
    Abstract: A filter includes a first resonant circuit having one or more first resonant frequencies, a second resonant circuit having one or more second resonant frequencies different from the first resonant frequency, and a switch connected to the first resonant circuit and the second resonant circuit. The switch switches between a first state in which a radio-frequency signal of the first resonant frequency flows from an IN terminal to an OUT terminal via the first resonant circuit and a radio-frequency signal of the second resonant frequency flows from the IN terminal to ground via the second resonant circuit and a second state in which a radio-frequency signal of the first resonant frequency flows from the IN terminal to ground via the first resonant circuit and a radio-frequency signal of the second resonant frequency flows from the IN terminal to the OUT terminal via the second resonant circuit.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: January 5, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hirotsugu Mori, Koji Nosaka