Including Specific Frequency Rejection Means Patents (Class 333/176)
  • Patent number: 10382000
    Abstract: A circuit board mounted with a capacitor includes an electrode to connect one terminal of a capacitor, a first inductor including a wiring pattern that extends from a first end connected with the electrode to a second end across a region mounted with the capacitor, and a second inductor including a wiring pattern that extends from the first end connected with the electrode to a second end across the region mounted with the capacitor from the opposite side from the first inductor. In a plan view, the wiring pattern of the first inductor and the wiring pattern of the second inductor intersect with each other, and an angle defined by the wiring pattern of the first inductor and the wiring pattern of the second inductor is an angle other than a right angle.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: August 13, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Atsushi Toujo
  • Patent number: 10277198
    Abstract: The present disclosure relates to a high power and low loss acoustic filter that includes a first node, a second node, a first power bypass path, and a first acoustic resonator (AR) path. The first power bypass path extends between the first node and the second node. The first AR path also extends between the first node and the second node, is in parallel with the first power bypass path, and includes at least one first acoustic resonator that form an acoustic resonator network. Herein, the first AR path has a notch filter response. The first power bypass path and the first AR path form a first filter cell that has a band-pass filter response.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: April 30, 2019
    Assignee: Qorvo US, Inc.
    Inventor: Kelly M. Lear
  • Patent number: 10148017
    Abstract: A multi-band antenna system includes an array of wide-band radiating elements and a multi-band electrical tilt circuit. The multi-band electrical tilt circuit includes a plurality of combiners, a first RF band variable phase shifter and a second RF band variable phase shifter implemented in a common medium. The common medium may comprise a PCB, a stripline circuit, or the like. Each combiner includes a combined port, a first RF band port, and a second RF band port. The combined ports are coupled to the radiating elements. The first RF band phase shifter has a first plurality of variably phase shifted ports connected to the first RF band ports of the combiners via transmission line, and the second RF band phase shifter has a second plurality of variably phase-shifted ports connected to the second RF band ports of the combiners via transmission line. The phase shifters are independently configurable.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: December 4, 2018
    Assignee: CommScope Technologies LLC
    Inventors: Morgan C. Kurk, Martin L. Zimmerman
  • Patent number: 10128552
    Abstract: A structure which cuts off propagation of an electromagnetic wave at one or more frequencies is provided. The structure comprises linear third conductors arranged on a plurality of different layers different from a first layer of a substrate including the first layer where a first conductor is formed and a second layer where a second conductor is formed, and at least one fourth conductor configured to connect one end of one conductor out of the third conductors to one end of another conductor out of the third conductors. At least one of the third conductors has a curved shape.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: November 13, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Jun Morita, Hajime Shimura
  • Patent number: 10056870
    Abstract: An apparatus includes an input transformer, an amplifier and an output transformer. The input transformer may be on a substrate and configured to convert an input signal into a differential input signal. The input signal may be a radio-frequency signal. The amplifier may be on the substrate and configured to generate a differential output signal in response to the differential input signal. The amplifier may be a balanced and distributed amplifier. The output transformer may be on the substrate and configured to convert the differential output signal into an output signal. Each of the input transformer and the output transformer may be a three line coupled balun transformer with a variable bandpass bandwidth.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: August 21, 2018
    Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
    Inventor: Kohei Fujii
  • Patent number: 10027304
    Abstract: A filter includes shunt circuits coupled between a reference node and each of an input port, an output port, a first node, and a second node. Resonant networks are coupled between the input port and the second node, and between the first node and the output port. Storage element circuits are coupled between the input port and the first node, and between the second node and the output port. The shunt circuits have an equivalent shunt circuit frequency response that partly defines a high passband frequency of the filter, the resonant networks have an equivalent resonant network frequency response that partly defines a low passband frequency of the filter, and the storage element circuits have an equivalent storage element circuit frequency response that defines a stopband frequency of the filter between the low passband frequency and the high passband frequency.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: July 17, 2018
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Ming Hsien Tsai, Fu-Lung Hsueh, Sa-Lly Liu, Tzong-Lin Wu, Yang-Chih Huang, Chin-Yi Lin
  • Patent number: 9929702
    Abstract: A multi-stage Radio Frequency (RF) power amplifier is presented herein. According to one embodiment, the amplifier comprises: a first amplification stage configured to amplify an input signal to provide a first output signal having a phase distortion; a second amplification stage having an input and configured to amplify the first output signal that is received at the input to provide a second output signal, wherein the second output signal has a carrier frequency (FC) modulated by a signal content (S) having a signal content bandwidth (FS); and a resonant circuit comprising an inductor and a capacitor and having a resonant frequency (FR), the resonant circuit coupled to the input of the second amplification stage and compensating for the phase distortion caused by the first amplification stage at frequencies within the signal content bandwidth FS, wherein the resonant frequency FR is less than the signal content bandwidth FS.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: March 27, 2018
    Assignee: Qorvo US, Inc.
    Inventors: Wenlong Ma, Barry Jia-Fu Lin
  • Patent number: 9729358
    Abstract: A radio frequency (RF) equalizer includes a coupler including an input port, an output port, a coupling port, and an isolation port; a combination circuit including; a coupling node electrically coupled to the coupling port; a first digitally controlled capacitor (DTC) connected between the coupling node and ground; a resistor connected between the coupling node and ground for controlling a quality factor (Q) of resonance of the equalizer; an isolation node coupled to the isolation port; and a second DTC connected between the isolation node and ground. A system and a method of operation are provided.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: August 8, 2017
    Assignee: Corning Optical Communications Wireless Ltd
    Inventor: Roi Yosy Ziv
  • Patent number: 9692311
    Abstract: The present invention relates to a high-voltage direct current (HVDC) converter comprising: a 12-pulse diode rectifier having two three-phase bridge diode rectifiers connected in series to rectify, to 12 pulses, alternating current (AC) power inputted from a point of connection on the sea; and a voltage-source converter connected in series to a lower end of the 12-pulse diode rectifier, wherein the voltage-source converter controls a voltage of the AC power inputted from the point of connection on the sea and a DC link voltage of the voltage-source converter.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: June 27, 2017
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Chan Ki Kim, Jin Young Kim, Dong Choon Lee, Thanh Hai Nguyen
  • Patent number: 9680441
    Abstract: An impedance matching circuit is connected to a first circuit block (impedance matching target circuit) that requires impedance matching and that has one terminal connected to a signal line and the other terminal connected to a ground, the impedance matching circuit having a second circuit block that has a first circuit and a second circuit connected in parallel. In the first circuit, a first capacitor having a variable capacitance and a first inductor having a first inductance are connected in series, and in the second circuit, a second inductor having a second inductance and a switch are connected are connected in series. The impedance matching circuit has one terminal connected to the signal line of the first circuit block and the other terminal connected to the ground of the first circuit block.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: June 13, 2017
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Fumitaka Iizuka, Kentaro Nakamura
  • Patent number: 9504826
    Abstract: An apparatus for personal skin treatment includes an RF generator and an applicator with at least a pair of electrodes mounted on the distal end of the applicator. The electrodes are configured for applying an RF voltage to a subject skin. The RF voltage generator supplies the electrodes with the RF voltage. The applicator includes a source of illumination illuminating the treated skin segment.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: November 29, 2016
    Assignee: Syneron Medical LTD
    Inventors: Lion Flyash, Boris Vaynberg
  • Patent number: 9467067
    Abstract: In a filter capacitor including three capacitor elements including a first capacitor element at an end on one side in an electrical connection form and a second capacitor element at an end on the other side, a pair of direct-current terminals including a positive-electrode-side main terminal and a negative-electrode-side main terminal, which receive a direct-current voltage from a direct-current power supply, are provided, a first conductor path length between a positive-electrode-side terminal of the first capacitor element and the positive-electrode-side main terminal and a second conductor path length between a positive-electrode-side terminal of the second capacitor element and the positive-electrode-side main terminal are approximately the same, and a third conductor path length between a negative-electrode-side terminal of the first capacitor element and the negative-electrode-side main terminal and a fourth conductor path length between the negative-electrode-side terminal of the second capacitor eleme
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: October 11, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Ryosuke Nakagawa
  • Patent number: 9455686
    Abstract: A wireless communication device and a tunable filter are provided. The tunable filter includes a first energy storage element, a first series resonant circuit, a second series resonant circuit, a first tunable parallel resonant circuit and a second tunable parallel resonant circuit. The first series resonant circuit and the second series resonant circuit respectively include a first capacitor and a first inductor electrically connected in series. The first tunable parallel resonant circuit and the second tunable parallel resonant circuit respectively include a variable capacitor and a second inductor electrically connected between a ground and a bias voltage. The first series resonant circuit is electrically connected between a first end of the first energy storage element and the first tunable parallel resonant circuit. The second series resonant circuit is electrically connected between a second end of the first energy storage element and the second tunable parallel resonant circuit.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: September 27, 2016
    Assignee: Wistron NeWeb Corp.
    Inventor: Chun-Chieh Huang
  • Patent number: 9373876
    Abstract: A fully integrated silicon-based bandpass filter which lends itself to applications in the gigahertz region is disclosed. The bandpass filter is fabricated on an integrated circuit and operates as a microwave/millimeter-wave filtering circuit. In accordance with one aspect, the bandpass filter includes a first set and a second set of filter coupled elements, a three-port “T” transmission line junction and a perturbing element. The three-port “T” transmission line junction has a first port coupled to a first end of a first one of the first set of filter coupled elements and a second port coupled to a first end of a first one of the second set of filter coupled elements. The perturbing element is coupled to a third port of the three-port “T” transmission line junction. A second one of the first set of filter coupled elements includes an input transmission line and has a first end thereof coupled to an input port and an opposite end thereof having an open end.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: June 21, 2016
    Assignee: Nanyang Technological University
    Inventors: Kai Xue Ma, Kok Meng Lim, Kiat Seng Yeo, Jian-guo Ma
  • Patent number: 9214973
    Abstract: The present disclosure includes systems and techniques relating to time-varying notch filter. In some implementations, an apparatus includes a time-variant notch filter and a controller. The time-variant notch filter includes a notch depth and a notch bandwidth. At least one of the notch depth or the notch bandwidth is based on a coefficient of the notch filter. The controller is configured to set at least one of the notch depth to a first depth or the notch bandwidth to a first bandwidth by setting a value of the coefficient to a first value during a ramp-up of the notch filter before a packet is received. The controller is also configured to set at least one of the notch depth to a second depth or the notch bandwidth to a second bandwidth by adjusting the value of the coefficient to a second value after the packet is received.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: December 15, 2015
    Assignee: Marvell International Ltd.
    Inventors: Swaroop Venkatesh, Vijay Ahirwar
  • Patent number: 9214920
    Abstract: An antenna matching circuit includes at least two signal paths are connected to one antenna connection. The signal paths are designed to transmit and/or receive RF signals. A matching circuit includes a discrete line for phase shifting integrated at the antenna end in at least one of the signal paths. In this case, at least one of the capacitances contained in the discrete line is in the form of a micro-acoustic resonator, whose resonance is shifted sufficiently far that it is outside the pass band of the respective signal paths.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: December 15, 2015
    Assignee: EPCOS AG
    Inventors: Andreas Link, Stephan Marksteiner
  • Patent number: 9153371
    Abstract: A coil device 10 comprises a first bobbin 40 provided with a first winding part 45 at an outer circumference and a second bobbin 50 provided with a second winding part 55 at an outer circumference. A plurality of partition walls 46, separating portions of the wire 22 which are adjacent to each other along the scroll axis Z of the first wire 22 are formed on the first winding part 45 along the scroll axis at predetermined intervals. A section width w1 of each section 47, which is along the scroll axis Z, separated by the partition walls 46 is determined so that only one wire 22 can pass through. A height of the partition walls 46 is determined so that one or more of the wires 22 can pass through. At least one connecting groove 46a, connecting each section which are adjacent to each other, is formed on each partition wall 46.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: October 6, 2015
    Assignee: TDK CORPORATION
    Inventors: Masaaki Iwakura, Nobuo Kitajima, Katsumi Kobayashi, Satoshi Sinbo
  • Publication number: 20150116053
    Abstract: A header block is configured to be attachable to an implantable medical device. The header block includes a header block body and a connection port disposed in the header block body configured to receive an implantable lead. A conductor is disposed in the header block body electrically coupled to the connection port at a first end and connectable at a second end to the implantable medical device. An impeding device is electrically coupled in series along the length of the conductor and disposed within the header block body. The impeding device is configured to raise the high-frequency impedance of the conductor. The impeding device may include a bandstop filter or an L-C tank circuit.
    Type: Application
    Filed: October 29, 2013
    Publication date: April 30, 2015
    Applicant: Greatbatch Ltd.
    Inventors: Robert A. Stevenson, Warren S. Dabney, Christine A. Frysz, Richard L. Brendel
  • Patent number: 8988167
    Abstract: An RF signal blocking device includes a capacitor unit and an inductor unit defining an LC resonance circuit. The capacitor unit and inductor unit are set such that a cutoff frequency in the LC resonance circuit after disconnection by fusing of a second inductor including a fuse wire, among first and second inductors of the inductor unit, fluctuates within a prescribed frequency band. The RF signal blocking device reliably blocks an RF signal in a prescribed frequency band after an abnormality of fusing in the second inductor including a fuse wire occurs due to an input of an RF signal having an RF power value greater than or equal to a predetermined level.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: March 24, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Hirokazu Yazaki
  • Patent number: 8981873
    Abstract: This invention features an absorptive tunable bandstop filter with a wide tuning range including first and second branches of all-pass filter networks, an input power divider for splitting the input signal and passing approximately half of the input signal power through each branch of the all-pass filter networks, and an output power combiner for recombining the signal power from each branch of the all-pass filter networks, at least one of the branches of the all-pass filter networks being electrically tunable to provide an approximately 180° phase difference with similar amplitudes of the split signal power to be recombined at the output power combiner for rejecting but substantially absorbing selected frequencies.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: March 17, 2015
    Assignee: Hittite Microwave Corporation
    Inventors: Cemin Zhang, Michael Koechlin
  • Patent number: 8975520
    Abstract: A ground loop isolator for a coaxial cable, for example that blocks DC current but which allows a desired band of RF through the ground loop isolator, and which is small enough to fit in the areas where coupling of the desired electronic equipment is to occur. Embodiments may include an outer area allowing for easier manual coupling of the coaxial cable connector nut to electronic devices.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: March 10, 2015
    Assignee: Steren Electronics International, LLC
    Inventors: Joshua Blake, Yiping Hu, Huihui Fu
  • Patent number: 8970323
    Abstract: Implementations are presented herein that include an antenna switch that includes a plurality of ports. A bandstop filter is coupled to at least one of the plurality of ports of the antenna switch and the bandstop filter is configured to attenuate a disturbing frequency. A transistor is configured to receive a control signal and to switch on the bandstop filter responsive to the control signal.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: March 3, 2015
    Assignee: Infineon Technologies AG
    Inventors: Winfried Bakalski, Nikolay Ilkov
  • Patent number: 8954026
    Abstract: An electronic device includes an adjustable filter with a first filter element, and a second filter element coupled to the first filter element. The second filter element includes a field effect transistor (FET) including a source terminal, a drain terminal, and a gate terminal. The source terminal and the gate terminal are coupled to a reference voltage. A control circuit is coupled to the drain terminal and is configured to apply a control voltage thereto to vary a capacitance between the source and drain terminals to adjust the adjustable filter.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: February 10, 2015
    Assignee: Harris Corporation
    Inventors: Andrew Mui, Anthony C. Manicone
  • Publication number: 20150015318
    Abstract: A transmitter may include a first path configured to receive a signal, to attenuate the low frequency components of the signal, and to output the low frequency component attenuated signal. The transmitter may further include a second path configured to receive the signal, to amplify the signal, and to output the amplified signal. The transmitter may also include a node coupled to the first path and the second path and configured such that the low frequency component attenuated signal and the amplified signal combine at the node.
    Type: Application
    Filed: July 12, 2013
    Publication date: January 15, 2015
    Inventor: Samir PARIKH
  • Patent number: 8922300
    Abstract: A filter and a layout structure of the filter are provided. The filter includes a substrate, three capacitors, and three inductors. The three capacitors and the first and second inductors are disposed on a top surface of the substrate. The third inductor is disposed on a lateral surface of the substrate. First electrodes of the first and third capacitors and a first terminal of the first inductor are connected to a first I/O terminal of the filter. A first electrode of the second capacitor, a second electrode of the third capacitor and a first terminal of the second inductor are connected to a second I/O terminal of the filter. A first terminal of the third inductor is connected to second electrodes of the first and second capacitors.
    Type: Grant
    Filed: October 2, 2011
    Date of Patent: December 30, 2014
    Assignee: Cyntec Co., Ltd.
    Inventor: Shih-Hsien Tseng
  • Patent number: 8923783
    Abstract: Provided is a wireless communication device in which an antenna switch module is omitted. The wireless communication device includes a PA that amplifies a transmission signal, a transmission circuit that processes the amplified transmission signal, an antenna, and a control unit that alternately activates and deactivates the PA, the transmission circuit being configured to match an impedance between the transmission circuit and the antenna when the PA is activated, and to put an impedance as seen from the antenna toward the transmission circuit when the PA is deactivated in a high impedance state.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: December 30, 2014
    Assignee: Panasonic Corporation
    Inventor: Tetsuya Ashizuka
  • Publication number: 20140347142
    Abstract: Techniques for providing low-cost and effective jammer rejection for a radio receiver. In an aspect, a notch filter is provided between a transformer and a differential mixer in the receiver. The notch frequency of the notch filter may be selected to correspond to an expected jammer frequency to effectively attenuate the jammer signal prior to down-conversion mixing by the mixer. The notch filter may be implemented using various techniques, e.g., an L-C combination having adjustable capacitance, and/or elliptic or Chebyshev filters.
    Type: Application
    Filed: May 23, 2013
    Publication date: November 27, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Li-Chung Chang, Ehab A. Abdel Ghany, Ahmed A. Youssef
  • Patent number: 8884718
    Abstract: A substantially temperature-independent LC-based oscillator uses bias control techniques. Temperature independence may be achieved by controlling the harmonic frequency content of the output of the oscillator by controlling the amplitude. Amplitude control may be achieved by inserting a control mechanism in the feedback loop of the oscillator.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: November 11, 2014
    Assignee: Si-Ware Systems
    Inventors: Nabil M. Sinoussi, Mohamed M. Weheiba, Ahmed A. Helmy, Ahmed H. A. Razek, Ayman Ahmed
  • Patent number: 8830011
    Abstract: A band-pass filter includes an input node coupled to receive an oscillating input signal, an output node, and a first LC resonator coupled to a first node coupled between the input node and the output node and to a first power supply node coupled to provide a first voltage. The first LC resonator includes a first capacitor, and a first inductor coupled in series with the first capacitor. The output node is coupled to output a filtered response signal that includes at least one zero based on the oscillating input signal and the first LC resonator.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: September 9, 2014
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Jun-De Jin, Tzu-Jin Yeh
  • Patent number: 8798177
    Abstract: Digital IQ imbalance estimation and compensation is facilitated by shaping the frequency response of receiver branches. In particular, in a multi-carrier receiver, the frequency response of signal processing elements in at least one receiver branch is set to not fully attenuate received signals in a frequency band of interest. The frequency band of interest is greater than the carrier bandwidth of the received signal processed by that receiver branch. In some embodiments, the received signal is not attenuated, and adjacent interfering signals are partially attenuated. This allows information regarding the interfering signals to appear in an IQ imbalance-induced, inter-carrier image of the signals in anther receiver branch, facilitating digital estimation and compensation of IQ imbalance.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: August 5, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Chester Park, Lars Sundström, Jim Svensson
  • Publication number: 20140203891
    Abstract: An RF signal blocking device includes a capacitor unit and an inductor unit defining an LC resonance circuit. The capacitor unit and inductor unit are set such that a cutoff frequency in the LC resonance circuit after disconnection by fusing of a second inductor including a fuse wire, among first and second inductors of the inductor unit, fluctuates within a prescribed frequency band. The RF signal blocking device reliably blocks an RF signal in a prescribed frequency band after an abnormality of fusing in the second inductor including a fuse wire occurs due to an input of an RF signal having an RF power value greater than or equal to a predetermined level.
    Type: Application
    Filed: March 24, 2014
    Publication date: July 24, 2014
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Hirokazu YAZAKI
  • Patent number: 8760242
    Abstract: A multilayer bandpass filter includes a first capacitor electrode of a first stage LC parallel resonator, a second capacitor electrode of a second stage LC parallel resonator, and a third capacitor electrode of a third stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the first stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the second stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the third stage LC parallel resonator. The inductor electrodes of the three LC parallel resonators are arranged so loop planes thereof are disposed about a center axis extending in a stacking direction of dielectric layers. This permits setting of electromagnetic coupling between the LC parallel resonators of an input and an output stage, and allows a filter's attenuation characteristics to be freely set.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: June 24, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Ikuo Tamaru, Hiroshi Masuda, Hirokazu Yazaki
  • Publication number: 20140159985
    Abstract: A current breaker comprises a multi-layer printed circuit board (PCB), a ground plane, a metal component and a conductive via hole. The ground plane is disposed in a first metal layer of the multi-layer PCB and comprises a slot forming inductive impedance. The slot comprises an extended portion. The metal component is disposed in a second metal layer of the multi-layer PCB. Capacitive impedance is formed between the metal component and the ground plane. The projection of the metal component on the ground plane and the extended portion of the slot partially overlap. The conductive via hole penetrates the multi-layer PCB to connect metal component with the ground plane. The first and the second metal layers are any two metal layers of the multi-layer PCB. The inductive impedance formed by the slot and the capacitive impedance formed between the metal component and the ground plane create a parallel LC equivalent circuit.
    Type: Application
    Filed: August 6, 2013
    Publication date: June 12, 2014
    Applicant: REALTEK SEMICONDUCTOR CORP.
    Inventors: SY-BEEN WANG, CHIH-PAO LIN, CHING-WEI LING
  • Patent number: 8749323
    Abstract: Provided are a band stop filter of a CRLH structure and a manufacturing method thereof. A band stop filter of a CRLH structure according to an exemplary embodiment of the present invention includes a microstrip transmission line formed on a substrate; a right handed material (RHM) region including a first stub and a first capacitor connected to the microstrip transmission line in parallel and stopping a signal of a first frequency band passing through the microstrip transmission line; and a left handed material (LHM) region further provided between the first stub and the first capacitor to block a signal of a second frequency band passing through the microstrip transmission line.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: June 10, 2014
    Assignees: Electronics and Telecommunications Research Institute, Soongsil University Research Consortium Techno-Park
    Inventors: Seung Back Jung, Seung In Yang
  • Publication number: 20140145898
    Abstract: A high-frequency module includes a semiconductor chip device that is mounted on an external circuit substrate by wire bonding. A switch forming section, a power amplifier forming section and a low noise amplifier forming section, realized by a group of FETs, which are active elements, are formed in the semiconductor chip device. Flat plate electrodes, which form capacitors are formed in the semiconductor chip device. Conductor wires that connect the external circuit substrate and the semiconductor chip device function as inductors. A group of passive elements that includes inductors and capacitors is formed. As a result, a high-frequency module that can be reduced in size while still obtaining the required transmission characteristic is realized.
    Type: Application
    Filed: January 31, 2014
    Publication date: May 29, 2014
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Daisuke TOKUDA
  • Publication number: 20140104284
    Abstract: This disclosure provides systems, methods, and apparatus for through substrate via inductors. In one aspect, a cavity is defined in a glass substrate. At least two metal bars are in the cavity. A first end of each metal bar is proximate a first surface of the substrate, and a second end of each metal bar is proximate a second surface of the substrate. A metal trace connects a first metal bar and a second metal bar. In some instances, one or more dielectric layers can be disposed on surfaces of the substrate. In some instances, the metal bars and the metal trace define an inductor. The inductor can have a degree of flexibility corresponding to a variable inductance. Metal turns can be arranged in a solenoidal or toroidal configuration. The toroidal inductor can have tapered traces and/or thermal ground planes. Transformers and resonator circuitry can be realized.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 17, 2014
    Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.
    Inventors: Ravindra V. Shenoy, Jitae Kim, Kwan-yu Lai, Jon Bradley Lasiter, Philip Jason Stephanou, Donald William Kidwell, Evgeni Petrovich Gousev
  • Patent number: 8698554
    Abstract: An apparatus comprising an input circuit, a cross coupled active circuit and an output circuit. The input circuit may be configured to generate a first portion of an intermediate signal in response to an input signal. The cross coupled active circuit may be configured to generate a second portion of the intermediate signal in response to a feedback of an output signal. The output circuit may be configured to generate the output signal in response to the intermediate signal. The output signal may pass frequencies above a target frequency.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: April 15, 2014
    Assignee: LSI Corporation
    Inventor: Andrew P. Krebs
  • Publication number: 20140091881
    Abstract: A passive filter may include at least one elliptical filter unit and at least one asymmetric rejection filter unit coupled in series with the elliptical filter unit. The at least one asymmetric rejection filter unit may have a frequency response curve that includes a dip with different attenuations on either side, and an overshoot upon exiting the dip at the side with the lower attenuation.
    Type: Application
    Filed: September 18, 2013
    Publication date: April 3, 2014
    Applicant: STMicroelectronics SA
    Inventors: Jean-Christophe Ricard, Cedric Durand, Frederic Gianesello
  • Patent number: 8680948
    Abstract: In a band elimination filter, a plurality of capacitors are connected in parallel between first and second terminals of an electromagnetic noise source which generates voltage fluctuations in a connecting lead connected to the first terminal, with the capacitors being connected to the connecting lead at respectively corresponding branch points. For each capacitor, the total series inductance of a first circuit path is made less than that of a second circuit path, where the first circuit path extends from the corresponding branch point to the second terminal via the capacitor, and the second circuit path extends from that branch point to the first terminal of the electromagnetic noise source. A resistor is connected in series with at least one of the capacitors, for damping parallel resonance caused by inductance components of an adjacent pair of capacitors.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: March 25, 2014
    Assignee: Denso Corporation
    Inventors: Kazuhiro Shirakawa, Hiroshi Taki, Yoichi Shoji
  • Patent number: 8653907
    Abstract: The present invention relates to microwave circuits, and more particularly to bypass circuits for bias connections. The bypass circuit comprises a capacitor in series with an inductor, the series combination being connected between the bias conductor and ground. This series combination provides low return loss at the operating frequency. A de-queueing circuit may be included in the bypass circuit to provide loss at other frequencies.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: February 18, 2014
    Assignee: Raytheon Company
    Inventors: Jon Mooney, David D. Heston, Claire E. Mooney, Tiffany E. Cassidy
  • Patent number: 8648672
    Abstract: An object is to obtain a steep and large attenuation amount in attenuation bands close to each other out of a band of a TV wave and to provide a filter in which the use number of inductors is reduced thereby to be able to contribute to downsizing of a device. Elastic wave resonators of a plurality of parallel arms for each forming plurality of attenuation band are connected to the same electric potential point in a signal path without aid of an inductor. Otherwise, a series circuit of a plurality of element parts generating series resonance is connected in a signal path as a parallel arm. Therefore, a large attenuation amount can be obtained in each of the plural attenuation bands, but a region equivalent to what is called a zero point exists between adjacent poles. However, there can be obtained a characteristic in which steep attenuations occur in both sides of the zero point even if the zero point exists.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: February 11, 2014
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventor: Tatsunori Onzuka
  • Publication number: 20140010122
    Abstract: A reactance filter comprising suppression in the stop band comprises an input connection (1) for applying an input signal (ES), an output connection (A100) for outputting an output signal (TS), at least series resonator (11, 12, 13, 14), which is connected in a signal path (SP) between the input connection (1) and the output connection (A100), a parallel resonator (21), which is connected between the signal path (SP) and a connection (M) in order to apply a reference potential, and an inductor (31), which is connected in series to the parallel resonator (21). A capacitor (50) is connected by means of one connection (A50a) between the at least one parallel resonator (21) and the inductor (31) and by means of the additional connection (A50b) to the output connection (A100). By connecting the reactance filter as a transmission filter in a duplexer component, the isolation in the receiving band of the duplexer component can be improved.
    Type: Application
    Filed: December 16, 2011
    Publication date: January 9, 2014
    Applicant: EPCOS AG
    Inventors: Tobias Krems, Wolfgang Till, Ravi Challa
  • Patent number: 8620251
    Abstract: An electronic device includes an adjustable filter with a first filter element, and a second filter element coupled to the first filter element. The second filter element includes a field effect transistor (FET) including a source terminal, a drain terminal, and a gate terminal. The source terminal and the gate terminal are coupled to a reference voltage. A control circuit is coupled to the drain terminal and is configured to apply a control voltage thereto to vary a capacitance between the source and drain terminals to adjust the adjustable filter.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: December 31, 2013
    Assignee: Harris Corporation
    Inventors: Andrew Mui, Anthony Manicone
  • Publication number: 20130328623
    Abstract: Some embodiments relate to a band-pass filter arranged in a ladder-like structure. The band-pass filter includes respective inductor-capacitor (LC) resonators arranged on respective rungs of the ladder-like structure. Respective matching circuits are arranged on a leg of the ladder-like structure between neighboring rungs.
    Type: Application
    Filed: June 12, 2012
    Publication date: December 12, 2013
    Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Jun-De Jin, Tzu-Jin Yeh
  • Publication number: 20130307642
    Abstract: A structure member is mounted in a communication apparatus including a conductive housing incorporating a dielectric substrate on which a high-frequency circuit is mounted. The structure member includes a pass member which passes a harmonic current component of an operating frequency generated in the dielectric substrate when the high-frequency circuit operates, and a suppression member having an EBG structure which suppresses a predetermined current component of the operating frequency. The structure member is provided between the dielectric substrate and the conductive housing. The suppression member is disposed along a current path of a harmonic current component flowing in the pass member.
    Type: Application
    Filed: May 2, 2013
    Publication date: November 21, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Katsuo Saito
  • Patent number: 8525618
    Abstract: A unit of a metamaterial includes an uppermost part electrode, a lowermost part electrode, a first internal electrode, a second internal electrode, a third internal electrode, a fourth internal electrode, and a transmission line. The transmission line connects a section of the uppermost part electrode which extends in the ?z direction to a section of the lowermost part electrode which extends in the +z direction. The length of the transmission line is set to substantially ½ of a resonant wavelength. The first internal electrode and the fourth internal electrode are respectively placed so as to be opposed to the uppermost part electrode and the lowermost part electrode. The first internal electrode and the fourth internal electrode are not electrically connected directly to each other.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: September 3, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Atsushi Toujo
  • Publication number: 20130120217
    Abstract: A reflective impedance element is connected to a port of a composite right/left-handed transmission line, and operates at a predetermined operating frequency so that an impedance when the reflective impedance element is seen from the port becomes a pure imaginary number jB. A reflective impedance component is connected to a port of the composite right/left-handed transmission line, and operates at the predetermined operating frequency so that an impedance when the reflective impedance element is seen from the port becomes ?jB.
    Type: Application
    Filed: July 28, 2011
    Publication date: May 16, 2013
    Inventors: Tetsuya Ueda, Gouki Haida, Shintaro Yamamoto
  • Publication number: 20130119949
    Abstract: Systems and methods are disclosed herein to a power factor adjustor comprising: a power factor measurement unit configured to measure the power factor on an input line to a load and generate a power factor correction signal based on the measured power factor; and a power factor adjustment unit connected to the power factor measurement unit comprising: a fixed capacitor connected in series to a first switching device; and an adjustable element having a variable capacitance connected in parallel to the fixed capacitor and in series to a second switching device, wherein the overall capacitance of the power factor adjustment unit is adjusted by adjusting the capacitance of the adjustable element or by toggling the first and second switching devices in response to the power factor correction signal.
    Type: Application
    Filed: October 31, 2012
    Publication date: May 16, 2013
    Applicant: PowerMag, LLC
    Inventor: PowerMag, LLC
  • Publication number: 20130076454
    Abstract: A band-pass filter that significantly reduces and prevents impedance mismatch without requiring special elements includes an input terminal, an output terminal, three LC parallel resonators arranged between the input terminal and the output terminal, and two trap resonators arranged between the three LC parallel resonators and the input terminal and the output terminal, respectively. Each of the two trap resonators is electromagnetically coupled to a respective one of the three LC parallel resonators.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 28, 2013
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Mitsutoshi IMAMURA
  • Patent number: 8391819
    Abstract: An active filter circuit includes an inductance-capacitance (LC) circuit (110) for wireless frequency input, a bi-directional mixer (120) and a filter impedance (130) series-coupled across at least part of the LC circuit (110), and another mixer (420) coupled to at least some portion of the LC circuit. Other circuits, processes, receivers, transmitters and transceivers are disclosed.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: March 5, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Gireesh Rajendran, Ashish Lachhwani, Rakesh Kumar