Frequency Domain Filters Utilizing Only Lumped Parameters Patents (Class 333/167)
  • Patent number: 10389329
    Abstract: A multilayer electronic component includes a multilayer body including insulator layers that are stacked, linear conductor traces each provided between adjacent ones of the insulator layers, and via conductors. A helical or substantially helical inductor is provided in the multilayer body. When viewed in the stacking direction of the multilayer body, all of the linear conductor traces, except a portion of one linear conductor trace, are superimposed within an annular or substantially annular linear conductor trace region. The portion of the one linear conductor trace is displaced inwardly from the annular or substantially annular linear conductor trace region.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: August 20, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Noboru Shiokawa
  • Patent number: 10284162
    Abstract: A filter circuit is provided having multipath interference mitigation. The filter includes a signal path extending from an input to an output. The signal path includes a conductive path and a ground. A pass band filter is disposed along the signal path between the input and the output. The pass band filter passes a first frequency spectrum in a provider bandwidth, and attenuates a second frequency spectrum in a home network bandwidth. The filter circuit further includes a multipath interference mitigation leg operatively branched from the signal path. The multipath interference mitigation leg increases a return loss of the home network bandwidth. A frequency response of the filter circuit is characterized by an insertion loss characteristic between the input and the output being less than 3 dB in the provider bandwidth, and more than 20 dB in the home network bandwidth.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: May 7, 2019
    Assignee: PPC BROADBAND, INC.
    Inventors: Erdogan Alkan, Raymond W. Palinkas
  • Patent number: 10243461
    Abstract: A voltage regulator circuit includes a comparator configured to compare whether an output voltage of the voltage regulator circuit is either equal to or less than a reference voltage; a control unit, coupled to the comparator, and configured to use a duty ratio of the output voltage to an input voltage of the control unit to estimate a time period; a first transistor, coupled to the control unit, and configured to be selectively turned on based on the estimated time period; and an inductor, coupled to the first transistor, configured to conduct an inductor current, wherein when the comparator determines that the output voltage is either equal to or less than the reference voltage, the first transistor is turned on during the estimated time period to allow the inductor current to be increased so as to accordingly increase the output voltage.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: March 26, 2019
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Ruopeng Wang, Alan Roth, Eric Soenen
  • Patent number: 10103914
    Abstract: An equalizer circuit includes an phase-to-phase connectors including an phase-to-phase capacitor and four phase-to-phase switches, four output buffers, and control signal generation circuitry. One terminal of each phase-to-phase switches is connected to one of four connection paths on which four conversion signals being different in phase by 90┬░ are input. The other one terminal of each phase-to-phase switches is connected to the phase-to-phase capacitor. Each output buffer is connected to one of the four connection paths and outputs an output signal. The control signal generation circuitry outputs control signals to control turning-on/off of the respective four phase-to-phase switches. A closing of the first, second, third, and fourth phase-to-phase switches are started from any one of phase-to-phase switches in one of a first ascending circulation and a first descending circulation based on the 4-phase control signals.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: October 16, 2018
    Assignee: Panasonic Corporation
    Inventor: Yohei Morishita
  • Patent number: 9985330
    Abstract: A radio frequency filter with a cavity structure is provided. The radio frequency filter includes a housing having an inner hollow portion to have a cavity and open from one side of the housing, a cover sealing the open side of the housing, and a resonant element disposed inside the hollow housing. A through hole is formed at a part of the cover, corresponding to the resonant element, and a tuning element is installed covering the through hole, for frequency tuning. The tuning element is formed of a material having a different thermal expansion coefficient from a thermal expansion coefficient of a material of the cover.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: May 29, 2018
    Assignee: KMW INC.
    Inventors: Nam-Shin Park, Joung-Hoe Kim
  • Patent number: 9979371
    Abstract: An elliptic combiner circuit filters a first and second signal in a first and second frequency band. A first resonator is coupled to a first input via a first capacitor and a second input via a second capacitor. A second resonator is coupled to a first and second signal path, coupled to the first and second input, via a third and a fourth capacitor. A first inductor is coupled between the first and third capacitors, and between the second and fourth capacitors. A third resonator is coupled to the first and second signal paths via a fifth, sixth, and seventh capacitors. A fourth resonator is coupled to the first signal path and a terminated port via an eighth, ninth and tenth capacitors. A second inductor is coupled between the fifth and eighth capacitors, and between the seventh and tenth capacitors. An output outputs the first and second signals.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: May 22, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Huairen Yi, Zhengxiang Ma
  • Patent number: 9979373
    Abstract: A filter circuit is provided having multipath interference mitigation. The filter includes a signal path extending from an input to an output. The signal path includes a conductive path and a ground. A pass band filter is disposed along the signal path between the input and the output. The pass band filter passes a first frequency spectrum in a provider bandwidth, and attenuates a second frequency spectrum in a home network bandwidth. The filter circuit further includes a multipath interference mitigation leg operatively branched from the signal path. The multipath interference mitigation leg increases a return loss of the home network bandwidth. A frequency response of the filter circuit is characterized by an insertion loss characteristic between the input and the output being less than 3 dB in the provider bandwidth, and more than 20 dB in the home network bandwidth.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: May 22, 2018
    Assignee: PPC BROADBAND, INC.
    Inventors: Erdogan Alkan, Raymond W. Palinkas
  • Patent number: 9948348
    Abstract: A switching method and apparatus that provides high isolation between circuit arms of a mobile communication device by attenuating noise over a defined frequency range using a switched shunt LC notch filter.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: April 17, 2018
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventors: George Nohra, Steven C. Sprinkle
  • Patent number: 9812922
    Abstract: An active magnetic bearing comprising a plurality of electromagnetic actuators, each actuator receiving for control thereof an input current and being able to exert a radial force on a shaft of a rotary machine, with respect to the rotation axis of said shaft, the shaft being able to be held without contact between the electromagnetic actuators and to undergo radial motion when it is in rotation, means for supplying input current of each actuator, the supply means comprising means for controlling the input current of each actuator, according to the position of the shaft with respect to the actuators. The supply means comprise means for damping the radial motion of the shaft.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: November 7, 2017
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD
    Inventor: Alfred Permuy
  • Patent number: 9780007
    Abstract: A test structure for an integrated circuit device includes a series inductor, capacitor, resistor (LCR) circuit having one or more inductor elements, with each inductor element having at least one unit comprising a first segment formed in a first metal layer, a second segment connecting the first metal layer to a semiconductor substrate beneath the first metal layer, and a third segment formed in the semiconductor substrate; and a capacitor element connected in series with each inductor element, the capacitor element defined by a transistor gate structure including a gate electrode as a first electrode, a gate dielectric layer, and the semiconductor substrate as a second electrode.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: October 3, 2017
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Xu Ouyang, Yunsheng Song, Tso-Hui Ting, Yongchun Xin
  • Patent number: 9582687
    Abstract: A reconfigurable integrator/differentiator circuit includes: a first input terminal; a first output terminal; a first current follower having a second input terminal, a second inverting output terminal providing feedback to the first input terminal, a third non-inverting output terminal being connected to the first output terminal, and a fourth inverting output terminal; a second current follower having a third input terminal, a fifth inverting output terminal providing feedback to the first output terminal, and a sixth non-inverting output terminal being connected to the first input terminal; a single capacitor being connected between the fourth inverting output terminal and ground; a first resistor being connected between the first input terminal and the second input terminal; and a second resistor being connected between the fourth inverting output terminal and the third input terminal.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: February 28, 2017
    Assignee: King Fahd University of Petroleum and Minerals
    Inventor: Hussain Abdullah Alzaher
  • Patent number: 9479317
    Abstract: Methods and apparatuses for optimized channel selection are disclosed. In one example, a channel quality is measured of each channel of an available number of channels on which a mobile communication device can transmit and receive. A subset of the available number of channels is allocated to a long range channel class responsive to the channel quality. An RSSI of the mobile communication device is monitored and correlated to a mobile communication device proximity to a base station. A channel is selected from the long range channel class if the mobile communication device proximity is greater than a predetermined proximity.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: October 25, 2016
    Assignee: Plantronics, Inc.
    Inventor: Stephen V Cahill
  • Patent number: 9422197
    Abstract: There is provided a dielectric ceramic composition including: a major component (a barium titanate-based base material); and a minor component, wherein in an XRD analysis of a sintered body obtained by sintering the dielectric ceramic composition, when a (110) peak of BaTiO3 is set as 1.00, a ratio of a peak of pyrochlore (RE2Ti2O7) at about 30.5 degrees with respect to the (110) peak of BaTiO3 satisfies 0.02 or less, where RE is at least one of Y, Dy, Ho, Sm, Gd, Er, La, Ce, Nd, Tb, and Pr.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: August 23, 2016
    Assignee: SAMUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Seok Hyun Yoon, Yun Jung Park, Doo Young Kim, Song Je Jeon, Chang Hoon Kim
  • Patent number: 9420329
    Abstract: Embodiments of a device for receiving a digital terrestrial, cable, or satellite television signal are described herein. For example, a silicon tuner module may be configured to receive a digital terrestrial, cable, or satellite television signal and output a digital bitstream, the digital bitstream may include audio visual content in an encoded transport stream. In a further example, a digital audio video connector may be configured to couple with a display device, the digital audio video connector may be configured to provide the digital bitstream to the display device according to a specification. In another example, a processing module may be configured to control the silicon tuner module in response to a Consumer Electronics Control command received from the display device via the digital audio video connector.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: August 16, 2016
    Assignee: BBY Solutions, Inc.
    Inventor: Mahmood Majid
  • Patent number: 9344145
    Abstract: The invention provides a method for transmitting a signal to an external electronic device. The method includes obtaining a compensation value by which an equalizer compensates a signal transmitted from the external electronic device, comparing the compensation value with a set of reference values so as to obtain one or more parameters, and adjusting an output signal transmitted from a transmit unit to the external electronic device based on the one or more parameters.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: May 17, 2016
    Assignee: M31 Technology Corporation
    Inventor: Ting-Chun Huang
  • Patent number: 9325049
    Abstract: A transmission line includes a signal terminal for inputting a first signal and a second signal, a first wire coupled to the signal terminal for transmitting the first signal, a second wire coupled to the signal terminal for transmitting the second signal, a filtering module coupled to the first and second wires for receiving the first and second signals to filter out noises of the first and second signal, a third wire coupled to the filtering module for transmitting the first signal, and a fourth wire coupled to the filtering module for transmitting the second signal.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: April 26, 2016
    Assignee: Wistron Corporation
    Inventors: Chih-Sheng Dai, Tien-Kuei Chiang
  • Patent number: 9306530
    Abstract: A filter circuit is provided having multipath interference mitigation. The filter includes a signal path extending from an input to an output. The signal path includes a conductive path and a ground. A pass band filter is disposed along the signal path between the input and the output. The pass band filter passes a first frequency spectrum in a provider bandwidth, and attenuates a second frequency spectrum in a home network bandwidth. The filter circuit further includes a multipath interference mitigation leg operatively branched from the signal path. The multipath interference mitigation leg increases a return loss of the home network bandwidth. A frequency response of the filter circuit is characterized by an insertion loss characteristic between the input and the output being less than 3 dB in the provider bandwidth, and more than 20 dB in the home network bandwidth.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: April 5, 2016
    Assignee: PPC BROADBAND, INC.
    Inventors: Erdogan Alkan, Raymond W. Palinkas
  • Patent number: 9281797
    Abstract: A high-frequency device includes a substrate including a plurality of layers that are stacked on top of one another and that include dielectric and magnetic layers, terminals, pattern conductors each formed on one layer, and via conductors each extending through one layer. The pattern conductors and via conductors connect the terminals and form a signal line that transmits a high-frequency signal. A first portion of the signal line includes a via conductor extending through one magnetic layer and/or a pattern conductor sandwiched between two magnetic layers and has a predetermined resistance to the high-frequency signal. A second portion of the signal line includes a capacitor formed of two pattern electrodes with at least one dielectric layer and no magnetic layers sandwiched there between and/or an inductor including a pattern conductor formed on a dielectric layer. The high-frequency device has an impedance to the high-frequency signal at the terminals.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: March 8, 2016
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Hirokazu Yazaki
  • Patent number: 9203370
    Abstract: A broadband circuit between an antenna operating in a first service band and a power feeding unit and allowing the antenna to operate in a second service band wider than the first service band, includes a first line connected to the power feeding unit, a second line connected to a ground surface, a first capacitor between the first and second lines, a third line connected to the ground surface and parallel to the first line, a fourth line connected to the antenna and parallel to the second line, a second capacitor between the first and third lines, a first inductor between the first and third lines and closer to the first and third lines than the third capacitor, a fourth capacitor between the second and fourth lines, and a second inductor between the second and fourth lines and closer to the second and fourth lines than the fourth capacitor.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: December 1, 2015
    Assignee: EMW CO., LTD.
    Inventors: Byung Hoon Ryu, Won Mo Sung, Yeon Sik Yu, Ui Sheon Kim
  • Publication number: 20150064970
    Abstract: Systems, methods and apparatus are disclosed for filtering. In one aspect a power cable apparatus is provided. The apparatus includes a cable portion. The apparatus further includes a first connector portion coupled to a first end of the cable portion. The apparatus further includes a second connector portion coupled to a second end of the cable portion opposite the first end. The apparatus further includes a filter circuit integrated within the second the connector portion, the filter circuit configured to attenuate emissions at an operating frequency of the electronic device.
    Type: Application
    Filed: January 28, 2014
    Publication date: March 5, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Zhen Ning Low, Fang Han
  • Patent number: 8922298
    Abstract: A cable emulator configured to emulate the electrical transfer function and properties of a length of conductive cable is disclosed for use in transmitter, receiver and transceiver operation without need for long and expensive length of actual cable. The cable emulator includes an input port for connection to a signal source, such as a transmitter and an output port for connection to a receiver or other signal analyzer. The input port connects to an input impedance matching element, which in turn connects to one or more filter stages. The output of the one or more filter stages connects to an output impedance matching element, which then connects to the output port. The one or more filter stage comprises one or more resistors, one or more inductors and one or more capacitors.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: December 30, 2014
    Assignee: Mindspeed Technologies, Inc.
    Inventors: Nader Kalantari, Alfredo Moncayo
  • Publication number: 20140340170
    Abstract: A GFCI compatible system and method for activating relay controlled lines having a filter circuit between neutral and ground is described herein. Specifically the disclosure teaches a GFCI compatible system for reducing CMN. A CMN Suppressor can comprise a hot line, a neutral line, and a ground line. The first ends of the hot line, the neutral line, and the ground line can be connected to a GFCI protected hot node, a GFCI protected neutral node, and an electrical ground. The second ends of the hotline, the neutral line, and the ground line can be connected to a CMN sensitive device hot line, a CMN sensitive device neutral line, and a CMN sensitive device ground line. The system can further comprise a high pass filter, a hot line relay contact, a neutral line relay contact, a hot line relay, and a neutral line power relay.
    Type: Application
    Filed: August 4, 2014
    Publication date: November 20, 2014
    Inventors: Bahram Mechanic, Tooraj Faridi
  • Publication number: 20140327498
    Abstract: A broadband circuit between an antenna operating in a first service band and a power feeding unit and allowing the antenna to operate in a second service band wider than the first service band, includes a first line connected to the power feeding unit, a second line connected to a ground surface, a first capacitor between the first and second lines, a third line connected to the ground surface and parallel to the first line, a fourth line connected to the antenna and parallel to the second line, a second capacitor between the first and third lines, a first inductor between the first and third lines and closer to the first and third lines than the third capacitor, a fourth capacitor between the second and fourth lines, and a second inductor between the second and fourth lines and closer to the second and fourth lines than the fourth capacitor.
    Type: Application
    Filed: December 18, 2012
    Publication date: November 6, 2014
    Applicant: EMW CO., LTD.
    Inventors: Byung Hoon Ryu, Won Mo Sung, Yeon Sik Yu, Ui Sheon Kim
  • Publication number: 20140313795
    Abstract: A bidirectional AC-DC converter is presented with reduced passive component size and common mode electro-magnetic interference. The converter includes an improved input stage formed by two coupled differential inductors, two coupled common and differential inductors, one differential capacitor and two common mode capacitors. With this input structure, the volume, weight and cost of the input stage can be reduced greatly. Additionally, the input current ripple and common mode electro-magnetic interference can be greatly attenuated, so lower switching frequency can be adopted to achieve higher efficiency.
    Type: Application
    Filed: April 11, 2014
    Publication date: October 23, 2014
    Applicant: The Regents of The University of Michigan
    Inventors: Chris Mi, Siqi Li
  • Publication number: 20140225681
    Abstract: An electromagnetic bandgap structure is provided, which includes a ground layer; a first power layer facing an upper portion of the ground layer with a dielectric interposed and comprising at least one first patch and at least one first branch; and a second power layer facing an upper portion of the first power layer with a dielectric interposed and comprising at least one second patch and at least one second branch.
    Type: Application
    Filed: July 1, 2013
    Publication date: August 14, 2014
    Inventors: Myunghoi KIM, Jin Ho JO, Jae Hoon KIM
  • Patent number: 8791767
    Abstract: An integrated circuit (IC) for compensating for a package inductance is disclosed. A first ground pad is directly connected to an on-chip ground node. A second IC ground pad is connected to the on-chip ground node via a tunable capacitor circuit, where the capacitance of the tunable capacitor circuit resonates with the package inductance at the operating frequency of the IC.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: July 29, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: ByungWook Min, Der-Woei Wu
  • Patent number: 8787037
    Abstract: An electronic device includes a shielding member, an electric circuit, and a filter capacitor. The electric circuit has an output line and is arranged inside the shielding member. The filter capacitor is arranged outside the shielding member to be connected to the output line.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: July 22, 2014
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Shimpei Sakoda, Yasuhiro Koike, Hiroaki Asano, Kiminori Ozaki, Sergey Moiseev
  • Patent number: 8768121
    Abstract: A filter and a method of filtering a high frequency electrical signal using photonic components is disclosed. The filter has a serially fiber-coupled laser source, a modulator, a filter, and a photodetector. The electrical signal is applied to the modulator. The modulated light propagates through the filter which is constructed to pass not only a modulated sideband, but also at least a fraction of light at the carrier frequency of the laser. The photodetector detects a signal at the beat frequency between the carrier and sideband signals, after both signals have propagated through the filter. As a result, a separate optical branch for light at the carrier frequency is not required, which considerably simplifies the filter construction and makes it more stable and reliable.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: July 1, 2014
    Assignee: Her Majesty the Queen in Right of Canada, as Represented by the Minister of Industry, Through the Communications Research Centre Canada
    Inventors: Howard Rideout, Joe Seregelyi, Ping Lu, St├ęphane Paquet, Jianping Yao, Stephen J. Mihailov, John Oldham, Mario Caron
  • Patent number: 8736400
    Abstract: A bandpass filter includes a first oscillating circuit having inductors (L1, L2) in parallel with capacitors (Cij1), and a second oscillating circuit having inductors (L3, L4) arranged in parallel with capacitors (Cij2). The capacitors (Cij1) of the first oscillating circuit have an assembly of variable capacitive elements (C11, C12, C13, C14) in series with a fixed capacitor (C1), and the capacitors (Cij2) of the second oscillating circuit have an assembly of variable capacitive elements (C21, C22, C23, C24) arranged in series with a fixed capacitor (C2). The first oscillating circuit and the second oscillating circuit are coupled together with capacitors of substantially fixed value (C3, C4) and these coupling capacitors are linked to different respective midpoints between variable capacitors in the first and second oscillating circuits.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: May 27, 2014
    Assignee: Thales
    Inventor: Marc Pouplier
  • Patent number: 8701065
    Abstract: A method of designing an acoustic microwave filter comprises selecting a filter section based on frequency response requirements. The filter section includes an input, an output, and a plurality of circuit elements. The circuit elements have at least in-line acoustic resonators or in-shunt acoustic resonators. The method further comprises selecting a value for each circuit element, selecting a number of filter sections, and cascading the selected number of filter sections to create a cascaded filter circuit design, such that at least one pair of immediately adjacent filter sections are connected to each other via their inputs or their outputs. The method further comprises adding parasitic effects to the cascaded filter circuit design to create a pre-optimized filter circuit design, optimizing the pre-optimized filter circuit design to create a final filter circuit design, and constructing the acoustic microwave filter based on the final filter circuit design.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: April 15, 2014
    Assignee: Resonant LLC
    Inventors: Richard N. Silver, Kurt F. Raihn, Neal O. Fenzi, Robert B. Hammond
  • Patent number: 8675339
    Abstract: A feedthrough capacitor includes an inner electrode that extends coaxially within a grounded outer electrode. A non-conductive, epoxy-based potting material insulates and adhesively joins opposing roughened portions of the inner and outer electrodes. A capacitor assembly extends between the inner and outer electrode and serves to bypass relatively high frequency signals carried by the inner electrode to the grounded outer electrode. The capacitor assembly includes a plurality of monolithic multilayer ceramic capacitors, each capacitor having first and second terminals that are respectively surface mounted onto inner and outer concentric conductive rings. A plurality of deflectable tines project radially inward from the inner ring and resiliently circumferentially contact the exterior of the inner electrode. Similarly, a plurality of deflectable tines project radially outward from the outer ring and resiliently circumferentially contact the interior of the outer electrode.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: March 18, 2014
    Inventor: George M. Kauffman
  • Patent number: 8604895
    Abstract: Analogue filter for filtering out a high-frequency switching noise in a pulse-width-modulated transmit signal, which is fed into a line by a line driver by means of a transformer, wherein at least one capacitor is connected in parallel to a secondary winding of the transformer and, together with a stray inductivity of the transformer, forms the analogue filter.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: December 10, 2013
    Assignee: Lantiq Deutschland GmbH
    Inventors: Sergio Walter, Andreas Wiesbauer, Giacomo Veranu, Thomas Potscher
  • Publication number: 20130307630
    Abstract: An integrated circuit for a radio frequency (RF) circuit such as a voltage controlled oscillator or an injection locked frequency divider is provided. The integrated circuit architecture includes a primary LC tank circuit comprising a first inductor and a first capacitive device connected in parallel and one or more secondary LC tank circuits, each comprising an inductor and a capacitive device connected in parallel. Each of the one or more secondary LC tank circuits is strongly coupled to the primary LC tank circuit and to each other either electrically, magnetically or a combination of electrically and magnetically.
    Type: Application
    Filed: October 21, 2011
    Publication date: November 21, 2013
    Applicant: NANYANG TECHNOLOGICAL UNIVERSITY
    Inventors: Kai Xue Ma, Nagarajan Mahalingam, Shouxian Mou, Kiat Seng Yeo
  • Patent number: 8545528
    Abstract: A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: October 1, 2013
    Assignee: Abbott Medical Optics Inc.
    Inventors: Raney Rob, David A King, David A Greenbaum
  • Patent number: 8432706
    Abstract: A printed circuit board and an electronic product are disclosed. In accordance with an embodiment of the present invention, the printed circuit board includes a first board, which has an electronic component mounted thereon, and a second board, which is positioned on an upper side of the first board and covers at least a portion of an upper surface of the first board and in which an EBG structure is inserted into the second board such that a noise radiating upwards from the first board is shielded. Thus, the printed circuit board can readily absorb various frequencies, be easily applied without any antenna effect and be cost-effective in manufacturing.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: April 30, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Han Kim, Chang-Sup Ryu
  • Patent number: 8410867
    Abstract: A filter for filtering of electromagnetic interference, with a base element, with at least one electrical filter component and with at least two input terminal contacts and at least two output terminal contacts for connection of an electric line, the input terminal contacts being connected to the output terminal contacts by conductor paths located on the base element. In the filter, a simple configuration and flexible use are ensured by each conductor path having at least two longitudinal contacts, via which a filter component can be electrically connected to a conductor path such that the electrical connection of the conductor path leads between the two longitudinal contacts by the filter component, and each conductor path has at least one cross contact so that two conductor paths are electrically connected to one another by way of a filter component when the filter component is electrically connected to the cross contacts.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: April 2, 2013
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventor: Arno Kiefer
  • Publication number: 20130049884
    Abstract: Low-frequency digital data input signals in an integrated circuit are controlled between first and second stages in a signal input path of the integrated circuit by a capacitance in the signal input path between the first and second stages. The capacitance is sized to attenuate high-frequency noise in the signal input path. In one embodiment, the integrated circuit may be an input buffer circuit in which the capacitance is a capacitor between the signal input path and a reference potential, a voltage source, or both. In another embodiment, the integrated circuit may be an oscillator circuit in which the capacitance is provided between corresponding elements of a differential pair of transistors in the first stage.
    Type: Application
    Filed: August 22, 2011
    Publication date: February 28, 2013
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kevin Patrick Lavery, Pravin P. Patel
  • Patent number: 8358183
    Abstract: Disclosed herein is an intermediate frequency filter having a variable pass band, which is capable of varying a pass band to minimize loss at a plurality of intermediate frequencies? The intermediate frequency (IF) includes a band pass filter unit arranged between a frequency conversion IC and a demodulation unit and configured to filter an IF signal output from the frequency conversion IC and output a resulting signal. A band varying unit is connected to the band pass filter unit and is configured to vary a pass band of the band pass filter unit. A switching unit connects or disconnects the band varying unit to or from the band pass filter unit. A control unit detects the IF signal and controls the switching unit in response to the IF signal so that the band varying unit is connected to or disconnected from the band pass filter unit.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: January 22, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kyo Sang Lee, Eun Young Shin
  • Patent number: 8339218
    Abstract: By having stages of a single-to-balanced band pass filter, except for a stage which receives a single-terminal signal, to not be coupled to ground, noises cannot have an available path to enter the single-to-balanced band pass filter so that common-mode signals may be reduced in magnitude.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: December 25, 2012
    Assignee: Cyntec Co., Ltd.
    Inventor: Chia-Cheng Chuang
  • Patent number: 8319572
    Abstract: An electromagnetic bandgap structure includes: first conductive plates, placed on a first planar surface; second conductive plates, placed on a second planar surface; a first conductive trace, electrically connecting any two adjacent first conductive plates with each other on the first planar surface, in which the two adjacent first conductive plates are in a first direction; a second conductive trace, electrically connecting any two adjacent second conductive plates with each other on the second planar surface, in which the two adjacent second conductive plates are in the first direction; a first stitching via, electrically connecting any two adjacent conductive portions lined up in a direction different from the first direction on the first planar surface with each other; and a second stitching via, electrically connecting any two adjacent conductive portions lined up in a direction different from the first direction on the second planar surface with each other.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: November 27, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Han Kim, Kang-Wook Bong
  • Publication number: 20120262250
    Abstract: A shielded three-terminal flat-through EMI/energy dissipating filter includes an active electrode plate through which a circuit current passes between a first terminal and a second terminal, a first shield plate on a first side of the active electrode plate, and a second shield plate on a second side of the active electrode plate opposite the first shield plate. The first and second shield plates are conductively coupled to a grounded third terminal. In preferred embodiments, the active electrode plate and the shield plates are at least partially disposed with a hybrid flat-through substrate that may include a flex cable section, a rigid cable section, or both.
    Type: Application
    Filed: June 20, 2012
    Publication date: October 18, 2012
    Applicant: GREATBATCH LTD.
    Inventors: Robert A. Stevenson, Christine A. Frysz, Warren A. Dabney, Robert Shawn Johnson
  • Patent number: 8289099
    Abstract: An electromagnetic bandgap structure includes: first conductive plates, placed on a first planar surface, in which the first conductive plates are lined up in a first direction; second conductive plates, placed on a second planar surface and arranged at an area corresponding to an area in which the first conductive plates are disposed, in which the second conductive plates are lined up in the first direction; a first stitching via, electrically connecting any two adjacent conductive portions with each other and in which the two adjacent conductive portions are lined up in a direction that is different from the first direction on the first planar surface; and a second stitching via, electrically connecting any two adjacent conductive portions with each other and in which the two adjacent conductive portions are lined up in a direction that is different from the first direction on the second planar surface.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: October 16, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Han Kim, Ja-Bu Koo, Dae-Hyun Park
  • Publication number: 20120256704
    Abstract: An RF filter for an active medical device (AMD), for handling RF power induced in an associated lead from an external RF field at a selected MRI frequency or range frequencies includes a capacitor having a capacitance of between 100 and 10,000 picofarads, and a temperature stable dielectric having a dielectric constant of 200 or less and a temperature coefficient of capacitance (TCC) within the range of plus 400 to minus 7112 parts per million per degree centigrade. The capacitor's dielectric loss tangent in ohms is less than five percent of the capacitor's equivalent series resistance (ESR) at the selected MRI RF frequency or range of frequencies.
    Type: Application
    Filed: February 29, 2012
    Publication date: October 11, 2012
    Applicant: GREATBATCH LTD.
    Inventors: Robert Shawn Johnson, Dominick J. Frustaci, Warren S. Dabney, Robert A. Stevenson, Keith W. Seitz, Christine A. Frysz, Thomas Marzano, Richard L. Brendel, John E. Roberts, William Thiebolt, Christopher M. Williams, Jason Woods, Buehl E. Truex
  • Patent number: 8279023
    Abstract: There is provided a filter circuit that includes: a flying capacitor which maintains polarity when switching from an input terminal to an output terminal, and the polarity of which is reversed when switching from the output terminal to the input terminal; a first capacitor that is provided in parallel to the flying capacitor, at the input terminal of the flying capacitor; and a second capacitor that is provided in parallel to the flying capacitor, at the output terminal of the flying capacitor. The flying capacitor includes a variable capacity element such that capacity becomes smaller when switching from the input terminal to the output terminal and capacity becomes larger when switching from the output terminal to the input terminal.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: October 2, 2012
    Assignee: Sony Corporation
    Inventors: Sachio Iida, Atsushi Yoshizawa
  • Publication number: 20120161900
    Abstract: An electronic device includes a shielding member, an electric circuit, and a filter capacitor. The electric circuit has an output line and is arranged inside the shielding member. The filter capacitor is arranged outside the shielding member to be connected to the output line.
    Type: Application
    Filed: December 21, 2011
    Publication date: June 28, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Shimpei Sakoda, Yasuhiro Koike, Hiroaki Asano, Kiminori Ozaki, Sergey Moiseev
  • Patent number: 8203400
    Abstract: A broadband filter filtering noise over a first conductive wire, a second conductive wire, and a third conductive wire includes a differential-mode filtering circuit connected to both the first conductive wire and the second conductive wire and a common-mode filtering circuit connected to both the first conductive wire and the second conductive wire. The differential-mode filtering circuit includes two inductors and two capacitors for filtering differential-mode noise of different frequencies. The common-mode filtering circuit includes two inductors and six capacitors filtering common-mode noise of different frequencies.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: June 19, 2012
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: He-Ping Chen, Kuo-Wei Hung, Hong-Hao Kang
  • Publication number: 20120135867
    Abstract: An I/O system and device for use with superconducting device provides multi-stage filtering using superconducting electrical pathways, while providing good thermal conductivity to maintain low temperature of the various components and allowing the easy mounting and dismounting of a device sample from a refrigerated environment. Filtering may include a lumped element filter assembly including multiple plates each carrying a number of lumped element filters. Filtering may include a metal powder filter assembly including multiple metal power filters formed in passages of a substantially non-magnetic portions. A device sample holder assembly secures a device sample, for example a superconducting quantum processor, and provides signals, ground and good thermal conduction.
    Type: Application
    Filed: January 18, 2008
    Publication date: May 31, 2012
    Inventors: Murray C. Thom, Andrew Berkley, Alexander M. Tcaciuc, Mark Johnson, Paul Bunyk, Jaspaul Chung, Jacob Craig Petroff, Florin Ciota
  • Publication number: 20120127049
    Abstract: A frequency stabilization device includes a first radiating element, a second radiating element, a feeding circuit connected to the first and second radiating elements, and a frequency stabilization circuit disposed between the feeding circuit and the first radiating element. The frequency stabilization circuit includes a primary-side series circuit connected to the feeding circuit and a secondary-side series circuit coupled to the primary-side series circuit via an electric field or a magnetic field. A first inductance element and a second inductance element are connected in series to each other, and a third inductance element and a fourth inductance element are connected in series to each other. The first and third inductance elements are coupled to each other, and the second and fourth inductance elements are coupled to each other.
    Type: Application
    Filed: January 30, 2012
    Publication date: May 24, 2012
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Noboru KATO
  • Patent number: 8179209
    Abstract: A serial resonance circuit is prepared. The serial resonance circuit is configured of a pair of resonance circuit is configured of a pair of resonance elements serially connected to each other at a midpoint therebetween and exhibiting resonance frequencies equal to each other. To both ends of the serial resonance circuit, phase shift circuits that shift phases so that the phases are reverse to each other are connected. A resonance output obtained from the serial resonance circuit when AC power is supplied between the midpoint and an input side of the phase shift circuit is obtained as an external output.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: May 15, 2012
    Inventor: Koichi Hirama
  • Patent number: RE44094
    Abstract: An impedance blocking filter circuit is provided for use in telecommunication systems for interconnecting between incoming telephone lines and customer's terminal equipment so as to unconditionally block impedances above 20 KHz due to the customer's terminal equipment from an ADSL network unit and/or home networking interface unit. The filter circuit includes first, second, and third inductors connected in series between a first input terminal and a first common point. A first resistor has its one end connected also to the first common point and its other end connected to a first output terminal. Fourth, fifth and sixth inductors are connected in series between a second input terminal and a second common point. A second resistor has its one end also connected to the second common point and its other end connected to a second output terminal. A capacitor has its ends connected across the first and second common points.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: March 19, 2013
    Assignee: Pulse Electronics, Inc.
    Inventor: Frederick J. Kiko