And Bandpass, Broadband (e.g., Wideband) Or Sidepass Means Patents (Class 330/306)
  • Patent number: 10193509
    Abstract: An output network connected to an output of a nonlinear unmatched power amplifier that provides an amplified voltage signal at a fundamental frequency. The output network includes multiple acoustic resonators configured to match multiple harmonic frequencies of the amplified voltage signal to one of substantially zero impedance, appearing as a short, or substantially infinite impedance, appearing as an open, resulting in zero voltage or zero current, respectively, to avoid power distribution at the higher harmonic frequencies. Each higher harmonic frequency is higher than a first harmonic frequency of the multiple harmonic frequencies, which is a fundamental frequency.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: January 29, 2019
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventor: Martin Fritz
  • Patent number: 10038415
    Abstract: Embodiments disclosed herein generally relate to power amplifier matching circuits used for matching impedance and harmonic control in a device, such as a cellular phone. In one example, a power amplifier matching circuit includes two DVCs, four inductors, a transistor, and a capacitor. Utilizing the two DVCs, the impedance matching ratio and the center frequency of the circuit are capable of adjustment as needed. Moreover, the inclusion of the two DVCs may also prevent harmonic frequencies from undesirably passing through the power amplifier matching circuit to the antenna of a cellular device. The power amplifier matching circuit may be used in conjunction with an amplifier, where the output of the amplifier is proportional to the current in the circuit.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: July 31, 2018
    Assignee: CAVENDISH KINETICS, INC.
    Inventor: Ray Parkhurst
  • Patent number: 9935592
    Abstract: The present invention breaks up the frequency bands which can be filtered by a simple low-loss band-pass or low pass filter. The second harmonic frequency is reduced by use of a non-linear clipper element which controls the driving waveform symmetry and can reduce the harmonics by as much as 5-15 db which makes the filter much simpler and allows the amplifier to remain wide-band. The output waveform from the amplifier is symmetrical or nearly symmetrical.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: April 3, 2018
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventors: Robert Bayruns, Tim Gittemeier
  • Patent number: 9847755
    Abstract: One aspect of this disclosure is a power amplifier module that includes a power amplifier configured to provide a radio frequency signal at an output, an output matching network coupled to the output of the power amplifier and configured to provide impedance matching at a fundamental frequency of the radio frequency signal, and a harmonic termination circuit coupled to the output of the power amplifier. The power amplifier is included on a power amplifier die. The output matching network can include a first circuit element electrically connected to an output of the power amplifier by way of a pad on a top surface of a conductive trace, in which the top surface has an unplated portion between the pad the power amplifier die. The harmonic termination circuit can include a second circuit element. The first and second circuit elements can have separate electrical connections to the power amplifier die. Other embodiments of the module are provided along with related methods and components thereof.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: December 19, 2017
    Assignee: Skyworks Solutions, Inc.
    Inventors: Weimin Sun, Peter J. Zampardi, Jr., Hongxiao Shao, Guohao Zhang, Hardik Bhupendra Modi, Dinhphuoc Vu Hoang
  • Patent number: 9825606
    Abstract: A wireless communication device and a filter are provided. The filter has an input end and an output end and includes a first energy storage element, a first series resonant circuit, a second series resonant circuit, a first parallel resonant circuit and a second parallel resonant circuit. The first and the second series resonant circuits respectively have a first capacitor and a first inductor connected in series. The first and the second parallel resonant circuits respectively have a second capacitor and a second inductor connected in parallel. The first series resonant circuit and the first parallel resonant circuit are electrically connected in cascade between a first end of the first energy storage element and a ground, and the second series resonant circuit and the second parallel resonant circuit are electrically connected in cascade between a second end of the first energy storage element and the ground.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: November 21, 2017
    Assignee: Wistron NeWeb Corp.
    Inventors: Ching-Feng Huang, Meng-Luen Lee
  • Patent number: 9270240
    Abstract: A circuit for frequency-dependent matching of a high-frequency amplifier stage includes high-frequency stage with an output to a total high-frequency path that divides a total frequency band into a plurality of partial frequency paths for respectively preset partial frequency bands. The outputs of the plurality of partial frequency paths are reunited again into the total high-frequency path, following the processing of the partial frequency bands of these partial frequency paths. The partial frequency paths include a matching network surrounded by a first and second pass filter. At least one partial frequency path is switchable, when a control signal is supplied thereto.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: February 23, 2016
    Assignee: Airbus Defence and Space GmbH
    Inventor: Ulf Schmid
  • Patent number: 9130642
    Abstract: A frequency-selective circuit includes a signal input port, a signal output port, and a frequency response control block. The frequency response control block includes a mixer module and a filter module. The mixer module has a first port electrically connected to a signal path between the signal input port and the signal output port, a second port electrically connected to the filter module, and a local oscillator (LO) port. The mixer module operates according to an LO input received by the LO port. The filter module is electrically connected to the second port of the mixer module.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: September 8, 2015
    Assignee: MEDIATEK INC.
    Inventors: Ming-Da Tsai, Siu-Chuang Ivan Lu
  • Patent number: 9131454
    Abstract: A power spectral density (PSD) shape may be modified based upon the transmitter power setting of a transmitter. The power associated with notched frequencies and adjacent frequencies may be adjusted responsive to a change in transmitter power setting. As a result of adjusting the power for the notched frequencies and adjacent frequencies when operating at the different transmitter power setting, the performance of the transmission system is improved. The PSD shape may be considered dynamic, being modified responsive to a change in transmitter power setting by adjusting power associated with notches in the PSD shape based on the transmitter power setting and PSD constraint.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: September 8, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Brian James Langlais, Ehab Tahir, Joubin Karimi, John Fraser Chappel, Son Binh Cam, Richard David Roze
  • Patent number: 9093972
    Abstract: A limiting circuit has a signal input and a signal output for limiting an output signal that is present at the signal output and that can be fed to a further circuit connected to the output of the limiting circuit. A voltage connection for feeding a bias voltage and a transistor are present, wherein the gate connection of the transistor is connected to the voltage connection by means of a first matching circuit and to the signal input by means of a second matching circuit.
    Type: Grant
    Filed: November 25, 2010
    Date of Patent: July 28, 2015
    Assignee: EADS Deutschland GmbH
    Inventors: Rolf Reber, Patrick Schuh
  • Publication number: 20150123736
    Abstract: A wideband driver amplifier with embedded passive filtering and gain peaking is described. The wideband driver amplifier comprises a voltage to current circuit, a passive band-selection filter, and a current to voltage circuit. The driver amplifier features an Embedded CLC-Ladder band-selection filter and thereby immune to process variations.
    Type: Application
    Filed: November 6, 2013
    Publication date: May 7, 2015
    Applicant: University of Macau
    Inventors: Ka-Fai UN, Pui-In MAK, Rui Paulo da Silva MARTINS
  • Patent number: 9008332
    Abstract: A processing chip for a digital microphone and related input circuit and a digital microphone are described herein. In one aspect, the input circuit for a processing chip of a digital microphone includes: a PMOS transistor, a resistor, a current source, and a low-pass filter. The described processing chip possesses high anti high-frequency interference capabilities and the described input circuit possesses high high-frequency power supply rejection ratio.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: April 14, 2015
    Assignee: Beijing KT Micro, Ltd.
    Inventors: Wenjing Wang, Jianting Wang, Rongrong Bai, Jing Cao
  • Patent number: 8975967
    Abstract: A low-noise amplifier (LNA) filter for use with global navigation satellite system (GNSS) devices is disclosed. A first LNA stage, which is configured to connect to an antenna configured to receive GNSS signals, includes an LNA. A second LNA stage, which is connected to the output of the first LNA stage, has a surface acoustic wave (SAW) filter and an LNA. A third LNA stage, which is connected to the output of the second LNA stage, also has a SAW filter and an LNA.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: March 10, 2015
    Assignee: Javad GNSS, Inc.
    Inventors: Javad Ashjaee, Dmitry Dubrovsky
  • Patent number: 8975957
    Abstract: Systems and methods are provided for amplifying multiple input signals to generate multiple output signals. An example system includes a first channel, a second channel, and a third channel. The first channel is configured to receive one or more first input signals, process information associated with the one or more first input signals and a first ramp signal, and generate one or more first output signals. The second channel is configured to receive one or more second input signals, process information associated with the one or more second input signals and a second ramp signal, and generate one or more second output signals. The first ramp signal corresponds to a first phase. The second ramp signal corresponds to a second phase. The first phase and the second phase are different.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: March 10, 2015
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Tingzhi Yuan, Yaozhang Chen, Lieyi Fang
  • Patent number: 8957728
    Abstract: Embodiments of circuitry, which includes an operational transconductance amplifier and a passive circuit, are disclosed. The passive circuit is coupled to the operational transconductance amplifier. Further, the passive circuit receives an input signal and the operational transconductance amplifier provides an output current, such that the passive circuit and the OTA high-pass filter and integrate the input signal to provide the output signal.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: February 17, 2015
    Assignee: RF Micro Devices, Inc.
    Inventor: Philippe Gorisse
  • Patent number: 8941441
    Abstract: A low noise amplifier including a variable gain amplifier stage configured to accept an input signal and to provide a load driving signal; a tunable bandpass filter connected as a load to the variable gain amplifier stage, wherein the bandpass filter includes a cross-coupled transistor pair, and at least one cross-coupled compensation transistor pair biased in a subthreshold region configured to add a transconductance component when the load driving signal is of a magnitude large enough to decreases a transconductance of the cross-coupled transistor pair; and, a controller circuit configured to tune the bandpass filter. The filter can be tuned in respect to the frequency and the quality factor Q.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 27, 2015
    Assignee: Innophase Inc.
    Inventors: Nicolo Testi, Xi Li, Xuejun Zhang, Yang Xu
  • Publication number: 20140361839
    Abstract: An apparatus, which includes a first electronic device, a first nonlinear capacitance compensation circuit, and a capacitance compensation control circuit, is disclosed. The first electronic device has a first nonlinear capacitance and is coupled to the first nonlinear capacitance compensation circuit, which has a first compensation capacitance and receives a first compensation control signal. The capacitance compensation control circuit adjusts the first compensation capacitance using the first compensation control signal to at least partially linearize the first nonlinear capacitance.
    Type: Application
    Filed: June 6, 2014
    Publication date: December 11, 2014
    Inventors: Baker Scott, George Maxim, Dirk Robert Walter Leipold, Christian Rye Iversen, Eric K. Bolton, Daniel Charles Kerr
  • Publication number: 20140340159
    Abstract: A circuit for frequency-dependent matching of a high-frequency amplifier stage includes high-frequency stage with an output to a total high-frequency path that divides a total frequency band into a plurality of partial frequency paths for respectively preset partial frequency bands. The outputs of the plurality of partial frequency paths are reunited again into the total high-frequency path, following the processing of the partial frequency bands of these partial frequency paths. The partial frequency paths include a matching network surrounded by a first and second pass filter. At least one partial frequency path is switchable, when a control signal is supplied thereto.
    Type: Application
    Filed: May 15, 2014
    Publication date: November 20, 2014
    Applicant: EADS Deutschland GmbH
    Inventor: Ulf SCHMID
  • Patent number: 8885783
    Abstract: Devices and methods for iteratively sampling a wideband signal in order to recover one or more narrowband signals are disclosed. In one aspect, a wideband signal is received and the signal is sampled using a sampling device, which includes an amplifier with an initial gain level, to produce a plurality of sampled signals. A first set of narrowband signals may be recovered from the plurality of sampled signals. Then, the wideband signal is re-sampled to produce a second plurality of sampled signals. The re-sampling includes increasing the gain of the amplifier to a second level and suppressing a component of the wideband signal. A second set of narrowband signals may then be recovered from the second set of sampled signals.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: November 11, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Chester Park
  • Patent number: 8879754
    Abstract: A home use sound reproduction system for Hi-fi, with digital signal transfer from a playback unit via a control unit to one or more active loudspeakers, each including or arranged beside an amplifier unit. The control unit is arranged to control sound parameters and send both a digital sound information signal and a power signal for powering the amplifier units, and to superimpose the single ended or differential digital signal together with the power signal on at least one common lead in a cable.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: November 4, 2014
    Assignee: Actiwave AB
    Inventor: Risberg par Gunnars
  • Patent number: 8836432
    Abstract: An amplifier includes an amplifying element that amplifies an input signal; an output terminal that outputs the signal amplified by the amplifying element; a matching circuit disposed in series between the amplifying element and the output terminal, and performing impedance matching; an impedance converter disposed in series between the amplifying element and the matching circuit or between the matching circuit and the output terminal; and a first resonator and a second resonator connected at the ends of the impedance converter.
    Type: Grant
    Filed: January 13, 2013
    Date of Patent: September 16, 2014
    Assignee: Fujitsu Limited
    Inventors: Toru Maniwa, Shigekazu Kimura
  • Publication number: 20140253249
    Abstract: An integrated circuit is disclosed. The integrated circuit includes an amplifier and a capacitor array coupled to the amplifier. The capacitor array is configured to be coupled in parallel to an inductor that is external to the integrated circuit, and the capacitor array and the external inductor comprise a tank circuit. The integrated circuit includes a resistor array coupled in parallel with the capacitor array. The resistor array is utilized to provide an overall frequency response of the capacitor array and resistor array that is opposite of a frequency response of the external inductor over a predetermined frequency range.
    Type: Application
    Filed: July 22, 2013
    Publication date: September 11, 2014
    Applicant: MediaTek Singapore Pte. Ltd.
    Inventor: Eng-Chuan LOW
  • Publication number: 20140184341
    Abstract: Embodiments of the invention are generally directed to integration of signal sampling within a transistor amplifier stage. An embodiment of an apparatus includes a amplifier stage including a transistor to receive a source signal and produce an output signal, wherein the transistor includes multiple fingers for at least a first electrode of the transistor. The amplifier stage uses connections to some of the fingers of the first electrode for production of the output signal, and uses one or more other fingers for the first electrode of the transistor for a separate function from the production of the output signal.
    Type: Application
    Filed: March 15, 2013
    Publication date: July 3, 2014
    Applicant: Silicon Image, Inc.
    Inventors: James R. Parker, Sohrab Emami
  • Patent number: 8766727
    Abstract: A power amplification circuit amplifies and then outputs transmission signals of a first frequency and a second frequency, which are different from each other. When the transmission signal of the first frequency is input, a first switch is turned ON, a first LC parallel resonant circuit enters a resonant state and the transmission signal is transmitted using a line containing a first capacitor as a main line. When the transmission signal of the second frequency is input, a second switch is turned ON, a second LC parallel resonant circuit enters a resonant state and the transmission signal is transmitted using a line containing a second capacitor as a main line. Therefore, a transmission signal does not pass through, using as a main line, a line into which a switch has been incorporated.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: July 1, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tomohide Aramata
  • Publication number: 20140167864
    Abstract: A tunable wide band driver amplifier is disclosed. In an exemplary embodiment, an apparatus includes a first band selection circuit selectively connected between an output terminal of an amplifier and a circuit ground. The first band selection circuit configured to adjust an amplification band from a first frequency band to a second frequency band. The apparatus also includes a first harmonic reduction circuit selectively connected between the first band selection circuit and the circuit ground and configured to reduce 2nd harmonic frequencies associated with the first frequency band when the amplification band is set to the first frequency band.
    Type: Application
    Filed: February 22, 2013
    Publication date: June 19, 2014
    Applicant: QUALCOMM INCORPORATED
    Inventors: Haigang Feng, Vinod V. Panikkath, Janakiram G. Sankaranarayanan, Bhushan Shanti Asuri
  • Patent number: 8736380
    Abstract: An amplifier for use in a buoyant cable antenna operable to receive signals within a frequency band includes: a first amplifier operable to provide amplified signals based on the received signals; a bandpass filter arranged to pass filtered signals within a first portion of the frequency band, the filtered signals being based on the amplified signals; an attenuator arranged in parallel with said bandpass filter and operable to attenuate signals within a second portion of the frequency band, the attenuated signals being based on the amplified signals; and a second amplifier operable to provide an amplified output including first amplified signals within the first portion of the frequency band and to provide second amplified signals within the second portion of the frequency band. The first amplified signals have a first gain, the second amplified signals have a second gain, and the first gain is more than the second gain.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: May 27, 2014
    Assignee: The Johns Hopkins University
    Inventors: James B. Mitchell, Bliss G. Carkhuff, Morris L. London, Robert E. Ball, Sr., Nathaniel J. Hundley
  • Patent number: 8729739
    Abstract: A circuit breaker comprising first and second JFETs, each comprising a gate, drain and source connection, the JFETs sources being operatively connected to each other to form a common-source connection and adapted to be connected to and operating to open an external circuit when the current flowing through the JFETs exceeds a predetermined threshold, the JFETs' gates, and common-source connection being operatively connected to a gate driver circuit which causes the JFETs to turn off when the predetermined threshold is exceeded; whereupon the current flows through the common-source connection into the second gate and into the gate driver circuit which causes the gate driver circuit to turn off the first and second JFETs and open the circuit breaker. Also claimed is a method of sensing an overloaded circuit comprising leading and trailing JFETs in a circuit that open the circuit and prevent current flow when a predetermined threshold is exceeded.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: May 20, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Vadim Lubomirsky, Damian Urciuoli
  • Patent number: 8723598
    Abstract: The disclosure relates to an electronic circuit for reducing leakage of radio frequency signals from a power amplifier of a wireless communication device is provided.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: May 13, 2014
    Assignee: Blackberry Limited
    Inventors: Lizhong Zhu, George Soliman Mankaruse, Michael Stephen Corrigan, Jun Xu, Kent Arnold Nickerson
  • Publication number: 20140097906
    Abstract: A single-stage buffer apparatus includes a first transistor, a second transistor, and a high pass filter network. The first transistor is configured to receive an input signal from a microphone. The second transistor is configured to operate as a cascode transistor. The high pass filter network is coupled to the first transistor and the second transistor. The second transistor electrically decouples the first transistor from an output of the single-stage buffer apparatus. A gate terminal of the second transistor is driven by the high-pass filter network, and the high-pass filter network is driven by the first transistor.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 10, 2014
    Applicant: Knowles Electronics, LLC
    Inventors: Michael Jennings, Craig Stein, Dean Badillo
  • Publication number: 20140062604
    Abstract: In accordance with an embodiment, a system includes a first amplifier and a first bandpass filter having an input coupled in series with an output of the first amplifier, and an output configured to be coupled to a load. The bandpass filter has a lower input impedance at an in-band center frequency than at out-of-band frequencies, and the first amplifier is configured to receive a pulse width modulated waveform filtered according to a first transfer function that attenuates sidebands of the pulse width modulated waveform.
    Type: Application
    Filed: September 4, 2012
    Publication date: March 6, 2014
    Applicant: INFINEON TECHNOLOGIES AG
    Inventors: David Seebacher, Peter Singerl, Christian Schuberth, Martin Mataln
  • Patent number: 8665028
    Abstract: An amplifier with integrated filter (e.g., an LNA) is described. In one design, the amplifier may include a gain stage, a filter stage, and a buffer stage. The gain stage may provide signal amplification for an input signal. The filter stage may provide filtering for the input signal. The buffer stage may buffer a filtered signal from the filter stage. The amplifier may further include a second filter stage and a second buffer stage. The second filter stage may provide additional filtering for the input signal. The second buffer stage may buffer a second filtered signal from the second filter stage. All of the stages may be stacked and coupled between a supply voltage and circuit ground. The filter stage(s) may implement an elliptical lowpass filter. Each filter stage may include an inductor and a capacitor coupled in parallel and forming a resonator tank to attenuate interfering signals.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: March 4, 2014
    Assignee: QUALOCOMM Incorporated
    Inventors: Tae Wook Kim, Guy Klemens, Kenneth Charles Barnett, Susanta Sengupta, Gurkanwal Singh Sahota
  • Patent number: 8659359
    Abstract: A radio frequency (RF) power transistor circuit includes a power transistor and a decoupling circuit. The power transistor has a control electrode coupled to an input terminal for receiving an RF input signal, a first current electrode for providing an RF output signal at an output terminal, and a second current electrode coupled to a power supply voltage terminal. The decoupling circuit includes a first inductive element, a first resistor, and a first capacitor coupled together in series between the control electrode of the first power transistor and the power supply voltage terminal. The first decoupling circuit is for dampening a resonance at a frequency lower than an RF frequency.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: February 25, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Hussain H. Ladhani, Gerard J. Bouisse, Jeffrey K. Jones
  • Patent number: 8606193
    Abstract: An RF transceiver integrated circuit has a novel segmented, low parasitic capacitance, internal loopback conductor usable for conducting IP2 self testing and/or calibration. In a first novel aspect, the transmit mixer of the transceiver is a current mode output mixer. The receive mixer is a passive mixer that has a low input impedance. In the loopback mode, the transmit mixer drives a two tone current signal to the passive mixer via the loopback conductor. In a second novel aspect, only one quadrature branch of the transmit mixer is used to generate both tones required for carrying out an IP2 test. In a third novel aspect, a first calibration test is performed using one quadrature branch of the transmit mixer at the same time that a second calibration test is performed using the other quadrature branch, thereby reducing loopback test time and power consumption.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: December 10, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Jin-Su Ko, Michael Kohlmann, Bahman Ahrari
  • Publication number: 20130307629
    Abstract: A power amplification circuit amplifies and then outputs transmission signals of a first frequency and a second frequency, which are different from each other. When the transmission signal of the first frequency is input, a first switch is turned ON, a first LC parallel resonant circuit enters a resonant state and the transmission signal is transmitted using a line containing a first capacitor as a main line. When the transmission signal of the second frequency is input, a second switch is turned ON, a second LC parallel resonant circuit enters a resonant state and the transmission signal is transmitted using a line containing a second capacitor as a main line. Therefore, a transmission signal does not pass through, using as a main line, a line into which a switch has been incorporated.
    Type: Application
    Filed: July 24, 2013
    Publication date: November 21, 2013
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Tomohide ARAMATA
  • Publication number: 20130263665
    Abstract: This document discusses, among other things, apparatus and methods for a front-end charge amplifier. In certain examples, a front-end charge amplifier for a microelectromechanical system (MEMS) device can include a charge amplifier configured to couple to the MEMS device and to provide sense information of a proof mass of the MEMS device, a feedback circuit configured to receive the sense information and to provide feedback to an input of the charge amplifier, and wherein the charge amplifier includes a transfer function having a first pole at a first frequency, a second pole at a second frequency, and one zero at a third frequency.
    Type: Application
    Filed: April 5, 2013
    Publication date: October 10, 2013
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Ion Opris, Hai Tao, Shungneng Lee
  • Patent number: 8547171
    Abstract: The disclosure relates to a printed circuit board (PCB) for an electronic circuit for a power amplifier of a wireless communication device. The PCB comprises: a substrate; a ground reference in the substrate; first through fourth locations and first and second pads in the substrate; and first and second electrical tracks in the substrate. The locations are for components for the PCB, including a 0 ohm component, and pads connect tracks to the components. The first pad is for a high band power input terminal of the amplifier. The first track connects the first pad to the second location. The third location is in the first track for placement of a first capacitor in a circuit between the first pad and ground. The second pad is for an output terminal of the amplifier. The second track connects the second pad to an output stage circuit of the amplifier.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: October 1, 2013
    Assignee: Research In Motion Limited
    Inventors: Lizhong Zhu, George Soliman Mankaruse, Michael Stephen Corrigan, Jun Xu, Kent Arnold Nickerson
  • Patent number: 8493153
    Abstract: A radio signal is input to a first terminal and output after amplification at a second terminal. There is a third terminal which is common to both the first and the second terminal. There is an inductance interfacing the second terminal to a direct current power supply; and a radio frequency filter connected in shunt with the inductance. In an exemplary embodiment the first, second and third terminals are respective base, collector and emitter terminals of a bipolar transistor. Such a bipolar transistor is characterized in that voltage from the power supply passes to the second terminal through the inductance but not through the radio frequency filter; and the signal output passes from the second terminal through the radio frequency filter but not through the inductance. The illustrated embodiments show the radio frequency filter as a surface acoustic wave filter in direct connection with the second terminal.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: July 23, 2013
    Assignee: Nokia Corporation
    Inventor: Hannu T. Laurila
  • Patent number: 8362833
    Abstract: Amplifier circuitry comprising a class-D amplifier for amplifying an audio input signal. The amplifier circuitry comprises sigma-delta modulation logic arranged to receive the audio input signal and to generate a modulated signal representative of the audio input signal, and an output stage arranged to generate an output signal for the amplifier circuitry. The amplifier circuitry further comprises finite impulse response, filter logic operably coupled between the modulation logic and the output stage, and having at least one zero in its transfer function arranged to substantially pass signal components within the modulated signal occurring at frequencies less than the at least one zero and to attenuate signal components within the modulated signal at frequencies greater than the at least one zero.
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: January 29, 2013
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Ludovic Oddoart, Berengere Le Men
  • Patent number: 8362834
    Abstract: The disclosure relates to an electronic circuit for attenuating harmonics in a power amplifier. The circuit comprises: a printed circuit board (PCB); a first electrical track in the PCB providing a connection from a high band power input terminal of the amplifier to a battery terminal; a first capacitor connected to the first track, the high band power input terminal and a ground reference in the PCB; a first high filter choke connected to the first track and to the terminal; a second electrical track connected to a low band power input terminal of the amplifier; a circuit implemented on the PCB and connected to an output terminal of the amplifier for an output signal from the amplifier, comprising a first filter and a low pass filter, the first filter connected to a 0 ohm resistor which is connected to the low pass filter.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: January 29, 2013
    Assignee: Research In Motion Limited
    Inventors: Lizhong Zhu, George Mankaruse, Michael Corrigan, Jun Xu, Kent Nickerson
  • Patent number: 8319562
    Abstract: An apparatus including cascaded amplification stages adapted to be biased by a common DC current to generate an amplified output signal from an input signal. A first amplification stage includes a routing network to substantially double an input voltage signal, and a first transconductance gain stage to generate a first current signal from the input voltage signal. A second amplification stage includes a resonator to convert the first current signal into a second voltage signal, and a second transconductance gain stage to generate a second current signal from the first current signal. A third amplification stage includes a current gain stage to generate a third current signal from the second current signal, and a load through which the third current signal flows to generate the output signal.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: November 27, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Bo Sun, Anthony F. Segoria
  • Publication number: 20120268211
    Abstract: According to an embodiment, a power amplifier includes: an MMIC substrate; a high frequency probe pad disposed on the MMIC substrate; and a metal plate disposed on the MMIC substrate so as to adjoin to the high frequency probe pad, and connected to an MMIC external circuit via a bonding wire.
    Type: Application
    Filed: December 20, 2011
    Publication date: October 25, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Choon Yong Ng, Kazutaka Takagi
  • Patent number: 8269554
    Abstract: The disclosure relates to a system and method for attenuating harmonics in a power amplifier. An electronic circuit for reducing leakage of radio frequency signals from a power amplifier of a wireless communication device is provided. The circuit comprises: a printed circuit board (PCB) having the power amplifier mounted on the PCB; a first electrical track in the PCB connecting to a power input terminal of the power amplifier; and a first capacitor connected to the first electrical track and a ground reference in the PCB, the first capacitor reducing transmission of radio frequency signals from the input terminal of the power amplifier.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: September 18, 2012
    Assignee: Research In Motion Limited
    Inventors: Lizhong Zhu, George Mankaruse, Michael Corrigan, Jun Xu, Kent Nickerson
  • Patent number: 8237509
    Abstract: An amplifier with integrated filter (e.g., an LNA) is described. In one design, the amplifier may include a gain stage, a filter stage, and a buffer stage. The gain stage may provide signal amplification for an input signal. The filter stage may provide filtering for the input signal. The buffer stage may buffer a filtered signal from the filter stage. The amplifier may further include a second filter stage and a second buffer stage. The second filter stage may provide additional filtering for the input signal. The second buffer stage may buffer a second filtered signal from the second filter stage. All of the stages may be stacked and coupled between a supply voltage and circuit ground. The filter stage(s) may implement an elliptical lowpass filter. Each filter stage may include an inductor and a capacitor coupled in parallel and forming a resonator tank to attenuate interfering signals.
    Type: Grant
    Filed: September 10, 2007
    Date of Patent: August 7, 2012
    Assignee: QUALCOMM, Incorporated
    Inventors: Tae Wook Kim, Guy Klemens, Kenneth Charles Barnett, Susanta Sangupta, Gurkanwal Singh Sahota
  • Patent number: 8203387
    Abstract: The present invention discloses a circuit providing a power for a sense amplifier that stabilizes a power voltage supplied to the sense amplifier by compensating a noise generated in the power voltage when the sense amplifier operates with an selectively generated decoupling noise. The circuit providing a power for a sense amplifier includes a sense amplifying circuit sensing and amplifying data loaded on a bit line with a first power. A power supplying unit provides the first power to the sense amplifying circuit. A decoupling unit generates a decoupling noise with a second power and provides the decoupling noise to the first power voltage. The decoupling noise is maintained for a period including a time point of an operation of the sense amplifying circuit and a predetermined time thereafter.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: June 19, 2012
    Assignee: Hynix Semiconductor Inc.
    Inventor: Jun Gi Choi
  • Patent number: 8154348
    Abstract: An amplifier circuit operating at a fundamental angular frequency •0, includes: a transistor which is represented by an equivalent circuit which includes: an equivalent output current source, a drain-source capacitor as a parallel parasitic capacitor to an output node of the equivalent output current source, and a drain inductor as serial parasitic inductor connected between the equivalent output current source and a drain output node; a harmonic frequency processing circuit which includes an input node connected with the drain output node and an output node; a resonant circuit section provided between the output node of the harmonic frequency processing circuit and a ground node and comprising (2n+1) resonators which have resonance frequencies different from each other; and a load resistance provided in a back stage of the harmonic frequency processing circuit.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: April 10, 2012
    Assignees: The University of Electro-Communications, Campus Create Co., Ltd.
    Inventors: Kazuhiko Honjo, Yoichiro Takayama, Ryo Ishikawa
  • Patent number: 8107901
    Abstract: A feedback loop with an adjustable closed loop frequency response. The feedback loop contains adjustable pole (212, 213) and adjustable zero elements (220,221) for changing the pole and/or zero locations in the feedback loop's loop frequency response thereby changing the closed loop frequency response of the feedback loop. In one embodiment, the feedback loop is a Cartesian feedback loop suitable for use in a radio transmitter.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: January 31, 2012
    Assignee: Motorola Solutions, Inc.
    Inventors: Paul H. Gailus, Manuel P. Gabato, Kevin J. McCallum, Jeffrey B. Wilhite
  • Patent number: 8040185
    Abstract: The present invention concerns an amplifying device arranged to receive an input signal having a certain duty cycle. The amplifying device comprise a first switching unit having an input terminal adapted to receive a first half of the input signal, and an output terminal adapted to be connected to a first signal output where a first half of an output signal is provided. The amplifying device comprise a second switching unit having an input terminal adapted to receive a second half of the input signal and an output terminal adapted to be connected to a second signal output where a second half of the output signal is provided. Also, the first switching unit and the second switching units are adapted to receive an input signal, wherein the first half of said input signal has the same duty cycle as the second half of the input signal but shifted in phase. The present invention also concerns a wireless transceiver and a radio transmission device.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: October 18, 2011
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Thomas Lejon
  • Patent number: 8018288
    Abstract: Embodiments of a high-linearity low-noise amplifier (LNA) are generally described herein. Other embodiments may be described and claimed. In some embodiments, an RF input signal may be amplified with a cascode amplifier. The cascode amplifier may include integrated notch filters to attenuate undesired signals. The cascode amplifier may operate from a large power supply when blockers are present to avoid voltage swing compression at its output. The cascode amplifier may be biased and designed to operate in a class AB mode to produce linear output current to avoid current compression or excessive current expansion.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: September 13, 2011
    Assignee: Intel Corporation
    Inventors: Jon S. Duster, Stewart S. Taylor
  • Patent number: 8008971
    Abstract: The disclosure relates to a system and method for attenuating harmonics in output signals. In the system, an electronic circuit for reducing leakage of radio frequency signals from a power amplifier of a wireless communication device is provided. The circuit comprises: a printed circuit board ‘PCB’ having the power amplifier mounted on the PCB; a first electrical track in the PCB connecting to a power input terminal of the power amplifier; and a first capacitor connected to the first electrical track and a ground reference in the PCB, the first capacitor reducing transmission of radio frequency signals from the input terminal of the power amplifier.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: August 30, 2011
    Assignee: Research in Motion Limited
    Inventors: Lizhong Zhu, George Mankaruse, Michael Corrigan, Jun Xu, Kent Nickerson
  • Publication number: 20110204982
    Abstract: A power amplifier and a bridge circuit in a power amplifier, thereinto, the power amplifier includes a comparator, a bridge circuit and a low-pass filter. The comparator is adapted to receive a first analog signal, compare the first analog signal with a reference signal and output a square wave signal. The bridge circuit is adapted to amplify the square wave signal and output the amplified square wave signal. The low-pass filter is adapted to convert the amplified square wave signal into a second analog signal. The bridge circuit includes a first MEMS switch and a second MEMS switch. The first MEMS switch and the second MEMS switch turn on alternately when the polarity of the square wave changes, and output a first voltage signal or a second voltage signal respectively. The amplified square wave signal includes the first voltage signal and the second voltage signal output alternately.
    Type: Application
    Filed: June 23, 2010
    Publication date: August 25, 2011
    Applicant: Jiangsu Lexvu Electronics Co., Ltd.
    Inventors: Lei Zhang, Herb He Huang
  • Patent number: 7973561
    Abstract: A receiver particularly suited for an M-BUS is described. During transmission, the receiver is disabled. After each transmission, nodes and states in the receiver are set to prepare the receiver to receive a signal. Once data is sensed, a feedback loop clips the input signal to the receiver to limit the swing of the input signal. The line of the power supply at the lower potential is modulated, rather than modulating the line at the higher potential, for the transmission of data.
    Type: Grant
    Filed: April 5, 2006
    Date of Patent: July 5, 2011
    Assignee: Echelon Corporation
    Inventors: Gilles vanRuymbeke, Andrew Robinson