With Control Of Input Electrode Or Gain Control Electrode Bias Patents (Class 330/129)
  • Patent number: 10257015
    Abstract: A polar transmitter includes an amplitude path comprising an amplitude signal that corresponds to an amplitude of a vector sum of an in-phase input signal and a quadrature input signal; a phase path comprising a phase modulator configured to phase-modulate a phase signal that corresponds to the phase of the vector sum of the in-phase input signal and the quadrature input signal; a digital power amplifier (DPA) configured to amplify the phase-modulated (PM) input signal based on the amplitude signal; a tunable matching network coupled to an output of the DPA and configured to adjust a load impedance of the DPA; and a controller configured to adjust the matching network based on a look-up table with respect to amplitude and frequency information, where the look-up table indicates a plurality of optimal operation modes of the matching network for specific combinations of amplitude and frequency information.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: April 9, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xun Luo, Jian Liang
  • Patent number: 10181820
    Abstract: Disclosed herein are power amplification systems that are dynamically biased based on a signal indicative of an envelope of the signal being amplified. The power amplification systems include a power amplifier configured to amplify an input radio-frequency (RF) signal to generate an output RF signal when biased by a biasing signal. The power amplification systems also include a bias component configured to generate the biasing signal based on an envelope signal indicative of an envelope of the input RF signal. The biasing signal can improve or enhance the linearity of the power amplification systems.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: January 15, 2019
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventors: Florinel G. Balteanu, Paul T. DiCarlo, Boshi Jin, Serge Francois Drogi
  • Patent number: 10164668
    Abstract: A mobile phone device, a radio frequency transceiver circuit and an impedance adjusting device. The present invention discloses a mobile phone device. The mobile phone device comprises a baseband processor, an antenna, a duplexer and a radio frequency transceiver circuit. The antenna is used to receive and send radio frequency signals. The duplexer is electrically connected to the antenna. The radio frequency transceiver circuit is connected to the baseband processor and the duplexer, respectively. The radio frequency transceiver circuit comprises a first power amplifier and an impedance adjusting device. The first power amplifier has a first output impedance.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: December 25, 2018
    Assignee: Intel Corporation
    Inventors: Jinfeng Zhou, Zhichong Chen
  • Patent number: 10164593
    Abstract: Embodiments of power detector circuits and related methods to compensate for undesired DC offsets generated within power detector circuits are disclosed. Input signals having input frequencies are received and converted to a magnitude signal, and reference signals are also generated. The magnitude signal may include a DC component proportional to a power of the input signal along with undesired DC offsets. The reference signal may include a DC component proportional to a power of at least one input reference signal along with undesired DC offsets. To compensate for errors introduced by the DC offsets, a programmable digital input signal is determined in a calibration mode and then applied to reference circuitry in a normal mode to compensate for the DC offsets. For the calibration mode, a difference between the magnitude signal and the reference signal is compared to a threshold value to generate a power detection output signal.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: December 25, 2018
    Assignee: Silicon Laboratories Inc.
    Inventors: Navin Harwalkar, John M. Khoury
  • Patent number: 10158419
    Abstract: In one embodiment, a method includes receiving two or more input radio-frequency (RF) signals, each input RF signal being received on a separate input channel and having a different frequency range. The method also includes amplifying each input RF signal of the two or more input RF signals separately to produce two or more respective amplified RF signals. The method further includes aggregating the two or more amplified RF signals into one aggregated communication signal using a passive waveguide multiplexer, where the aggregated communication signal is an E-band communication signal having a frequency range within approximately 71-76 GHz or approximately 81-86 GHz. The method also includes transmitting the aggregated communication signal.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: December 18, 2018
    Assignee: Facebook, Inc.
    Inventor: Abhishek Tiwari
  • Patent number: 10129825
    Abstract: Processes, methods and circuits for improving battery life by reducing the battery power-drain of battery-powered devices using wireless transceivers is disclosed. Embodiments of the present invention provide for dynamically changing the bias current, impedance, and gain, either separately or in combination, during circuit operation to optimize or to reduce power dissipation. The dynamic variations may be implemented by varying the value of a resistance and/or a capacitance by opening switches across one or more portions of the resistance. Also, the dynamic variations may include setting any of the gain, bias current, or impedance parameters of the receiver circuit in between a high and low level, followed by adjusting the parameter up or down in response to a desired signal and an interferer signal.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: November 13, 2018
    Assignee: Theta IP, LLC
    Inventor: Yannis Tsividis
  • Patent number: 10122322
    Abstract: Dynamic error vector magnitude correction for radio-frequency amplifiers. In some embodiments, a radio-frequency amplification system can include an amplifier configured to receive an input signal through an input path and generate an amplified signal, a power adjustment component implemented along the input path and configured to adjust power of the input signal, and a control circuit configured to provide a control signal to the power adjustment component based on an operating condition associated with the amplifier, such that an impact of the operating condition on the amplifier is compensated by the adjusted power of the input signal.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: November 6, 2018
    Assignee: Skyworks Solutions, Inc.
    Inventors: Lui Lam, Zhiguo Lai, Andrew Raymond Chen
  • Patent number: 10109999
    Abstract: An envelope tracking power supply (ET PS) transmission line switch can be operable between an ET PS and a radio frequency (RF) power amplifier (PA). The ET PS transmission line switch assembly can include a quarter wavelength (¼?) transmission line configured for high impedance at a specified low RF and a switch coupled to a specified point on the quarter wavelength transmission line to generate a high frequency quarter wavelength transmission line when the switch is toggled. The quarter wavelength transmission line is configured to be coupled to a voltage output of the ET PS and a RF output of the RF PA. The high frequency quarter wavelength transmission line is configured for high impedance at a specified high RF, and the specified high RF is higher than the specified low RF.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: October 23, 2018
    Assignee: Raytheon Company
    Inventor: Mark B. Walker
  • Patent number: 10103921
    Abstract: A method for transmitting a signal is described, wherein the method has transforming a signal into a frequency domain to obtain a spectrum, forming a filtered spectrum according to a filter spectrum and occupying a set of subcarriers of a frequency domain representation of an Orthogonal Frequency Division Multiplex (OFDM) signal with the filtered spectrum. A temporary signal is obtained by transforming the frequency domain representation of the OFDM signal into a time domain. The temporary signal is subjected to a phase modulation.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: October 16, 2018
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Volker Jungnickel, Liane Grobe
  • Patent number: 10097148
    Abstract: Provided is a power amplification module that includes: a first amplification circuit that amplifies a first signal and outputs the amplified first signal as a second signal; a second amplification circuit that amplifies the second signal and outputs the amplified second signal as a third signal; and a feedback circuit that re-inputs/feeds back the second signal outputted from the first amplification circuit to the first amplification circuit as the first signal. The operation of the first amplification circuit is halted and the first signal passes through the feedback circuit and is outputted as the second signal at the time of a low power output mode.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: October 9, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Shota Ishihara
  • Patent number: 10079637
    Abstract: A very small aperture terminal (VSAT) installation tool is provided having the ability to measure cable loss along an interfacility link (IFL) between an outdoor unit and an indoor unit of the VSAT. Radio frequency (RF) signals can be transmitted from the indoor unit to the outdoor unit, where the RF signals are intercepted along the IFL prior to reaching the outdoor unit, and the output power is determined. The determined output power is compared to an expected output power at the indoor unit. The delta between the determined output power and the expected output power can be used to adjust the power of the indoor unit such that the outdoor unit can operate without reaching its compression point.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: September 18, 2018
    Assignee: Hughes Network Systems, LLC
    Inventors: Emanuel Girard Harrington, George Eapen, Yong Kang Yuan
  • Patent number: 10063203
    Abstract: Embodiments of power detector circuits and related methods to compensate for undesired DC offsets generated within power detector circuits are disclosed. Input signals having input frequencies are received and converted to a magnitude signal, and reference signals are also generated. The magnitude signal may include a DC component proportional to a power of the input signal along with undesired DC offsets. The reference signal may include a DC component proportional to a power of at least one input reference signal along with undesired DC offsets. To compensate for errors introduced by the DC offsets, a DC offset calibration signal or a gain are determined in a calibration mode and then applied in a normal mode to compensate for the DC offsets. For the calibration mode, a difference between the magnitude signal and the reference signal is compared to a threshold value to generate a power detection output signal.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: August 28, 2018
    Assignee: Silicon Laboratories Inc.
    Inventors: Navin Harwalkar, John M. Khoury
  • Patent number: 10038992
    Abstract: Devices, systems, and method are provided for wireless coded communication (WCC) devices, which are configured for wireless communication with other devices, e.g., over a network. A WCC device is a type of internet of things (IOT) device that can sense data, process data, send data, respond to data requests and exchange data with other WCC device, a network device, a user device, and/or systems over the internet. In some configurations, a WCC device may include a power source that enables usage of low power, e.g., to send data that is sensed, request data and/or communicate data wirelessly. WCC devices maybe function as standalone devices or may be integrated into other devices. In some configurations, a WCC device may include power harvesting circuitry, including power harvesting user controls. A WCC device may be pre-configured or coded to report occurrence of an event, log an event, log state, cause an action, send a message or request data from one or more end nodes.
    Type: Grant
    Filed: July 23, 2016
    Date of Patent: July 31, 2018
    Inventors: Gary M. Zalewski, Albert S. Penilla
  • Patent number: 10033343
    Abstract: A device includes a reconfigurable receiver front end having variable gain and variable bandwidth configured to tune to a plurality of communication channels in a communication band, the reconfigurable receiver front end responsive to a signal power level.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: July 24, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Aleksandar Miodrag Tasic, Chiewcharn Narathong, Gurkanwal Singh Sahota, Shrenik Patel
  • Patent number: 10028222
    Abstract: An apparatus and method for controlling power in a communication system are provided. The method includes amplifying an input signal by a second processor farther from an antenna than a first processor, and determining whether to enable or disable each of the first processor and the second processor based on results from the amplification by the second processor. Another method includes amplifying an input signal from an antenna by a second processor electrically farther from the antenna than a first processor, and determining whether to operate the first processor and the second processor based on a value related to a reception state for the amplified signal by the second processor.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: July 17, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ju-Ho Son, Jeong-Ho Lee, Chul-Woo Byeon, Dae-Young Lee, Sun-Kyu Choi
  • Patent number: 10014886
    Abstract: A bias circuit provides additional bias current for power amplifiers during data bursts to compensate for the gain droop caused by a rise in the power amplifier temperature during the data burst. A bias circuit includes a difference amplifier and switches coupled to the difference amplifier. The switches operate the bias circuit in a first mode when a transmit data burst is detected and operate the bias circuit in a second mode after the bias circuit has operated in the first mode for a predetermined period of time. In the first mode, the bias circuit charges a storage capacitor and sets an output current to zero. In the second mode, the bias circuit outputs the output current that increases above the initial value of zero as the PA warms up, where the excursion of this increase of current is determined by a register. The switches disable the bias circuit when the transmit data burst ends.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: July 3, 2018
    Assignee: Skyworks Solutions, Inc.
    Inventors: Edward John Wemyss Whittaker, Gordon Glen Rabjohn
  • Patent number: 9989622
    Abstract: In a general aspect, the radio state of a wireless communication device is controlled. In some aspects, a first set of motion detection signals is processed by operation of a radio subsystem of a wireless communication device in a first radio state. An amount of variation in the first set of motion detection signals is determined based on values of a parameter of the motion detection signals. A counter is updated in response to a determination that the variation is greater than a first threshold, and the radio subsystem is changed to a second radio state based on comparing the value of the counter with a second threshold. A motion detection process is executed to detect motion of an object in the space based on a second set of motion detection signals processed by operation of the radio subsystem in the second radio state.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: June 5, 2018
    Assignee: Cognitive Systems Corp.
    Inventors: Dustin Griesdorf, Stephen Arnold Devison, Christopher Vytautas Olekas
  • Patent number: 9991850
    Abstract: An RF amplifier module that has a plurality of amplifiers wherein at least one of the amplifiers is powered via an envelope tracking module. The biasing input of at least one of the amplifiers is provided to the first amplifier to power the first amplifier to reduce power consumption. The first amplifier may also be powered via fixed biasing to provide greater stability of the module.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: June 5, 2018
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventor: Philip John Lehtola
  • Patent number: 9979496
    Abstract: Some embodiments include a system for simulating electromagnetic environments that includes a channel emulator having a plurality of outputs, each output associated with a different operational path. Each operational path has a power amplifier, an antenna and a first coupling mechanism. The power amplifier is coupled to an output of the channel emulator. The antenna is in communication with a test region of the apparatus. The first coupling mechanism simultaneously couples power to the antenna and to a first measurement path when the operational path is coupled to the test region, so that a calibration state of the operational path can be determined and adjusted without interruption of a signal coupled to the antenna in the operational path.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: May 22, 2018
    Assignee: ETS- Lindgren Inc.
    Inventor: Michael David Foegelle
  • Patent number: 9979359
    Abstract: Optimized impedance characteristics of a variable impedance device causes the apparatus to transmit wireless signals with minimal out-of-band transmission at an optimized efficiency of the power amplifier. The variation of impedance characteristics of an antenna cause a change in the coefficients of a mapping function. The relatively fast variations to the power supply voltage of a power amplifier are applied to the mapping function to generate control signals which vary the impedance characteristics of a variable impedance device. The output of the mapping function includes control signals that control optimized impedance characteristics of a variable impedance device as a function of the variation of the supply voltage to a power amplifier. The coefficients of the mapping function may be regularly determined based on a comparison of out-of-band power and in-band power transmitted by an antenna.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: May 22, 2018
    Assignee: CCIP, LLC
    Inventor: Ronald Duane McCallister
  • Patent number: 9906209
    Abstract: A biased impedance circuit, an impedance adjustment circuit, and an associated signal generator are provided. The biased impedance circuit is coupled to a summation node and applies a biased impedance to the summation node. A periodic input signal is received at the summation node. The biased impedance circuit includes a switching circuit for receiving an output window signal, wherein a period of the output window signal is shorter than a period of the periodic input signal. The switching circuit includes a low impedance path and a high impedance path. The low impedance sets the biased impedance to a first impedance when the output window signal is at a first voltage level. The high impedance path sets the biased impedance to a second impedance when the output window signal is at a second voltage level. The first impedance is less than the second impedance.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: February 27, 2018
    Assignee: MEDIATEK INC.
    Inventors: Keng-Meng Chang, Yao-Chi Wang
  • Patent number: 9900735
    Abstract: A communication system providing volume attenuation as a function of distance from the communication source to simulate natural communication.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: February 20, 2018
    Assignee: FEDERAL SIGNAL CORPORATION
    Inventors: Traci Barron, Scott Cassidy, David Perry, Eric Sugalski
  • Patent number: 9872260
    Abstract: A power adjustment method includes: measuring output power that is obtained when input power to be amplified in a linear region is input to a power amplifier configured to amplify input power linearly in the linear region and amplify input power nonlinearly in a nonlinear region; deriving a straight line connecting a measurement point corresponding to the measured output power and a boundary point between the linear region and the nonlinear region in a coordinate plane representing input/output characteristics; acquiring information on an approximate equation that is stored in advance in correspondence with the measured output power, the approximate equation representing a relation between input power and output power in the nonlinear region; and storing information on the derived straight line and the acquired information on the approximate equation in a semiconductor integrated circuit provided at a preceding stage of the power amplifier.
    Type: Grant
    Filed: May 29, 2016
    Date of Patent: January 16, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Nobuhide Hachiya, Takashi Tanii, Yasuhiro Murakami, Yusuke Yamamori, Yasuaki Takeuchi, Masahiko Hirao, Manabu Murakami, Mikio Hayashihara
  • Patent number: 9838962
    Abstract: Processes, methods and circuits for improving battery life by reducing the battery power-drain of battery-powered devices with wireless receivers is disclosed. Embodiments provide for variably changing the bias current, impedance, and gain through a plurality of values, either separately or in combination, during receiver circuit operation to optimize power dissipation. The dynamic changes to gain, bias and impedance characteristics of the receiver circuit may occur in any of an amplifier, a filter, and a mixer, and are responsive to the components of an input signal comprising a desired signal and interferer signal. Dynamic changes may also be made to a dynamic range and noise floor of the receiver circuit.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: December 5, 2017
    Assignee: Theta IP, LLC
    Inventor: Yannis Tsividis
  • Patent number: 9813997
    Abstract: A wireless transmission system disclosed herein includes a transmitter-receiver pair. When a dielectric object approaches the transmitter-receiver pair, a signal strength of a transmitted carrier wave increases at the receiver. In response, transmission power of the transmitter can be dynamically reduced. When the dielectric object moves away from the transmitter-receiver pair, a signal strength of the carrier wave decreases at the receiver. In response, the transmission power of the transmitter can be dynamically increased.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: November 7, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Sean Russell Mercer, Charbel Khawand
  • Patent number: 9813276
    Abstract: A method for transmitting a signal is described, wherein the method has transforming a signal into a frequency domain to obtain a spectrum, forming a filtered spectrum according to a filter spectrum and occupying a set of subcarriers of a frequency domain representation of an Orthogonal Frequency Division Multiplex (OFDM) signal with the filtered spectrum. A temporary signal is obtained by transforming the frequency domain representation of the OFDM signal into a time domain. The temporary signal is subjected to a phase modulation.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: November 7, 2017
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Volker Jungnickel, Liane Grobe
  • Patent number: 9813025
    Abstract: Embodiments of the invention provide an apparatus for amplifying a radio frequency transmission signal, comprising: an envelope signal obtaining unit (210) configured to obtain a slow envelope signal indicating a time averaging amplitude component of the radio frequency signal and a fast envelope signal indicating an instant amplitude component of the radio frequency signal; a supply voltage modulating unit (230) configured to provide an output modulated supply voltage to the power amplifying unit by modulating a direct current supply voltage based on both the slow envelope signal and the fast envelope signal; and a power amplifying unit (220) configured to amplify power of the radio frequency transmission signal according to the output modulated supply voltage.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: November 7, 2017
    Assignee: Nokia Technologies Oy
    Inventor: Zhancang Wang
  • Patent number: 9800905
    Abstract: In accordance with one or more embodiments, digitally encoded audio may be sent by a computing system to a user system over a network. The user system may receive the digitally encoded audio, may produce a sound encoded within the digitally encoded audio, and may record a sample of the sound as produced by the user system. The sample may be analyzed, a format of digitally encoded audio may be selected based on the analysis, and audio digitally encoded in accordance with the selected format may be sent by the computing system to the user system over the network.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: October 24, 2017
    Assignee: Comcast Cable Communications, LLC
    Inventors: Dave Rose, White Webuye, Dave Ohare
  • Patent number: 9791489
    Abstract: A device with at least one channel for measuring high dynamic range, radio frequency (RF) power levels over broad-ranging duty cycles includes a power sensor circuit comprising at least one logarithmic amplifier; at least one directional RF coupler electrically connected to the at least one power sensor; at least one RF attenuator electrically connected to the at least one RF coupler; and at least one sampling circuit electrically connected to the at least one RF attenuator and the at least one RF coupler. The at least one sampling circuit performs analog-to-digital conversion of electrical signals received to provide digitals signals for measuring the RF power level in the at least one channel.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: October 17, 2017
    Assignee: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Paul A. Bottomley, William Edelstein, Abdel-Monem M. El-Sharkawy, Di Qian
  • Patent number: 9793858
    Abstract: The invention relates to a technique for controlling in an envelope tracking amplification stage, comprising: determining a representation of the output signal of the amplifier; determining a representation of the input signal of the amplifier; adjusting the determined representation of the input signal according to a target characteristic of the amplifier; comparing the adjusted input and determined representation of the output; and generating a control signal in dependence on the comparison.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: October 17, 2017
    Assignee: SnapTrack, Inc.
    Inventor: Nicholas Shute
  • Patent number: 9793943
    Abstract: A duplexer-less transceiver arrangement is disclosed. The transceiver comprises a receiver configured for frequency-division duplex communication with a communication network; a transmitter configured for frequency-division duplex communication with the communication network; an antenna port for connecting to an antenna; a balancing impedance circuit arranged to provide an adaptive impedance arranged to mimic the impedance at the antenna port; and an impedance network differentially connecting the receiver, transmitter, antenna port and balancing impedance circuit, wherein the impedance network includes a cross-connection.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: October 17, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Henrik Sjöland, Stefan Andersson, Tobias Tired, Johan Wernehag
  • Patent number: 9784794
    Abstract: A parameter estimation device using a filter includes a preprocessing computing circuit, a state estimating circuit and a state-of-charge estimating circuit. A low-pass filter of the preprocessing computing circuit transfers the voltage preprocessing value and the current preprocessing value from inputted discharge-and-charge current value and terminal voltage value, respectively. The state estimating circuit estimates parameters of a state equation of a battery equivalent model based on the battery equivalent model containing a resistance and a capacitor from the voltage preprocessing value and the current preprocessing value inputted. The state-of-charge estimating circuit estimates the state of charge from state quantity obtained. The time constant varies in such a way that the higher the temperature and the state of charge becomes the smaller the time constant becomes.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: October 10, 2017
    Assignee: CALSONIC KANSEI CORPORATION
    Inventors: Kinnosuke Itabashi, Nozomu Teranishi
  • Patent number: 9787267
    Abstract: The present invention relates in one aspect to an audio amplification circuit comprising an input terminal for receipt of an input signal from a transducer. A signal processor is operatively coupled to the input terminal for receipt and processing of the input signal to generate a processed digital audio signal in accordance with a programmable configuration setting of the signal processor. A serial data transmission interface is configured for receipt of the processed digital audio signal and supply of a corresponding digital audio stream at an output terminal of the integrated audio amplification circuit. A serial data receipt interface is operatively coupled to an externally accessible configuration terminal of the integrated audio amplification circuit and a controller is configured to adjust one of the programmable configuration setting of the signal processor and a format of a digital audio stream in accordance with first configuration data received through the serial data receipt interface.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: October 10, 2017
    Assignee: INVENSENSE, INC.
    Inventors: Mikael Mortensen, Jacob Midtgaard
  • Patent number: 9768373
    Abstract: A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: September 19, 2017
    Assignee: Covidien AG
    Inventors: James H. Orszulak, James W. McPherson
  • Patent number: 9768729
    Abstract: A power amplifier has improved power added efficiency at high output power. The power amplifier includes: a first transistor for amplifying an input signal input to the base thereof and outputting the amplified signal from the collector thereof; a second transistor with power-supply voltage applied to the collector thereof to supply bias voltage or bias current from the emitter thereof to the base of the first transistor; a third transistor whose collector is connected to the collector of the first transistor to amplify the input signal input to the base thereof and output the amplified signal from a collector thereof; a fourth transistor whose base and collector are connected to supply bias from the emitter thereof to the base of the third transistor; and a first resistor with bias control voltage applied to one end thereof and the other end connected to the bases of the second and fourth transistors.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: September 19, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuma Sugiura, Takashi Yamada, Norio Hayashi, Satoshi Tanaka, Kenichi Shimamoto, Kazuo Watanabe
  • Patent number: 9768810
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, determining, by a controller of a mobile communication device, a phase shift criteria and an amplitude shift criteria associated with a modulation being implemented by the mobile communication device. The controller can determine a group of tuning steps that satisfies the phase and amplitude shift criteria and that provides a desired tuning step for a matching network of the mobile communication device. Additional embodiments are disclosed.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: September 19, 2017
    Assignee: BlackBerry Limited
    Inventors: Matthew Greene, Carsten Hoirup, Keith Manssen
  • Patent number: 9735743
    Abstract: Optimized impedance characteristics of a variable impedance device causes the apparatus to transmit wireless signals with minimal out-of-band transmission at an optimized efficiency of the power amplifier. The variation of impedance characteristics of an antenna cause a change in the coefficients of a mapping function. The relatively fast variations to the power supply voltage of a power amplifier are applied to the mapping function to generate control signals which vary the impedance characteristics of a variable impedance device. The output of the mapping function includes control signals that control optimized impedance characteristics of a variable impedance device as a function of the variation of the supply voltage to a power amplifier. The coefficients of the mapping function may be regularly determined based on a comparison of out-of-band power and in-band power transmitted by an antenna.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: August 15, 2017
    Assignee: CCIP, LLC
    Inventor: Ronald Duane McCallister
  • Patent number: 9729111
    Abstract: A method for facilitating the impedance matching of radiofrequency circuits, notably transmission circuits using a power amplifier connected to a load which may include an antenna. A signal is produced for measuring the temperature resulting from the operation of the output amplifier stage, by a temperature sensor positioned in the immediate vicinity of this stage, the measuring signal is used to control a circuit for controlling the variable impedances of a matching network positioned between the amplifier and the load, and values which seek to minimize the sensed temperature are applied to these variable impedances values. An abnormal heating of the amplifier is an indication of an impedance mismatch that must be corrected to restore a minimum temperature.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: August 8, 2017
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventor: José Luis Gonzalez Jimenez
  • Patent number: 9716475
    Abstract: A selectable low noise amplifier (LNA) system comprising, a plurality of LNAs having a plurality of LNA characteristics and at least one selection switch network coupled to the plurality of LNAs to select at least one of the plurality of LNAs.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: July 25, 2017
    Assignee: Peregrine Semiconductor Corporation
    Inventor: Hossein Noori
  • Patent number: 9692392
    Abstract: Techniques to implement a filter for a selected signal path by reusing a circuit component in an unselected signal path are disclosed. In an exemplary design, an apparatus includes first, second, and third circuits. The first circuit passes a first radio frequency (RF) signal to an antenna when a first signal path is selected. The second circuit passes a second RF signal to the antenna when a second signal path is selected. The third circuit is selectively coupled to the first circuit, e.g., via a switch. The first and third circuits form a filter for the second RF signal (e.g., to attenuate a harmonic of the second RF signal) when the second signal path is selected and the first signal path is unselected. The first circuit may include a series inductor, and the third circuit may include a shunt capacitor.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: June 27, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Jose Cabanillas, Aristotele Hadjichristos, Per O Kristensen, Mohan V Puntambekar
  • Patent number: 9693138
    Abstract: A circuit may include an audio amplifier (314) configured to amplify an input signal (SAUDIO) to generate an output signal (SOUT+, SOUT?) suitable for driving a loud speaker (316). A first circuit (318) may be configured to generate a first analog signal (SI) based on a current level drawn by the loud speaker (316), and a second circuit (320) may be configured to generate a second analog signal (SV) based on a voltage supplied across the loud speaker (316). A third circuit (322, 312) may be configured to generate a third analog signal (RESIDUE) based on the difference between the first and second analog signals, and modify the input signal (SAUDIO) based on the third analog signal.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: June 27, 2017
    Assignee: STMicroelectronics (Alps) SAS
    Inventors: Christian Fraisse, Angelo Nagari
  • Patent number: 9680671
    Abstract: A transceiver device 100 includes a transmit path module 110, a receive path module 120 and a compensation signal generator module 130. The transmit path module 110 generates a high frequency transmit signal 112 based on a baseband transmit signal. The receive path module 120 generates a baseband receive signal 122 based on a received high frequency receive signal 114. Further, the compensation signal generator module 130 generates a compensation signal 132 comprising at least one signal portion with a frequency equal to a frequency of an undesired signal portion of the baseband receive signal 122 caused by an undesired signal portion within the high frequency transmit signal 112 comprising a frequency equal to an integer multiple larger than 1 of a transmit frequency of the high frequency transmit signal 112.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: June 13, 2017
    Assignee: Intel IP Corporation
    Inventors: Peter Noest, Gregory Chance
  • Patent number: 9660599
    Abstract: A system and method are provided for controlling a radio frequency (RF) power amplifier. A magnitude input and a phase input are received for transmission of a RF signal by the RF power amplifier. A digital pulse, having a center position relative to an edge of a reference clock based on the phase input and having a width based on the magnitude input, is generated. The digital pulse is filtered with a resonant matching network to produce the RF signal corresponding to the magnitude input and the phase input.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: May 23, 2017
    Assignee: NVIDIA Corporation
    Inventor: William J. Dally
  • Patent number: 9653129
    Abstract: Apparatus for chip-to-chip communications may include a first driving unit and a second driving unit. The first driving unit may receive input data, generate a first output data based on the input data, and output the first output data. The second driving unit may receive the input data, generate a second output data with a pre-emphasis peak and output the second output data. The second output data may be generated by delaying and inverting the input data, and have a predetermined weight.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: May 16, 2017
    Assignee: SK Hynix Memory Solutions Inc.
    Inventors: Chun-Ju Shen, Jenn-Gang Chern, Zichuan Cheng, Huei-Ching You
  • Patent number: 9653062
    Abstract: A method of enabling a hearer to hear desired sound while also being able to be aware of ambient sound, comprises providing a first non-sound signal representative of said desired sound, deriving a second non-sound signal from said ambient sound, combining the first and second non-sound signals in providing a third non-sound signal, and converting said third non-sound signal into sound.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: May 16, 2017
    Inventors: Archiveades Georgiou, Antony Zenonos
  • Patent number: 9647622
    Abstract: An embodiment method includes measuring, by a calibration device, a first output voltage of a variable gain amplifier (VGA) when the VGA is set at a first gain setting and measuring, by a calibration device, a second output voltage of the VGA when the VGA is set at a second gain setting different from the first gain setting. The method further includes calculating, by the calibration device, an offset voltage of a signal path including the VGA using the first output voltage and the second output voltage and calculating, by the calibration device, an internal offset voltage of the VGA using the first output voltage and the second output voltage.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: May 9, 2017
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Kent Jaeger, Zhihang Zhang, Matthew Miller, Ramesh Chadalawada
  • Patent number: 9641164
    Abstract: A quadrature LC tank based digitally controlled ring oscillator (DCO). The oscillator structure incorporates a plurality of stages, each stage including a buffer and a series LC tank. Four stages are coupled together to create a 360 degree phase shift around a loop. The oscillation frequency of the oscillator is the same as the resonant frequency of each LC tank, therefore it avoids quality factor degradation of LC tanks found in the prior art. In one example embodiment, class-D amplifiers are used to drive each of the LC tanks. Capacitor banks before at the input and output of the buffers provide coarse and fine tuning of the frequency of oscillation. The high efficiency exhibited by these amplifiers results in very good phase noise performance of this oscillator. The oscillator utilizes a startup circuit to launch oscillation upon power on.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: May 2, 2017
    Assignee: Technische Universiteit Delft
    Inventors: Massoud Tohidian, Robert Bogdan Staszewski, Ali Fotowat Ahmady, Seyed Amir Reza Ahmadi Mehr, Mahmoud Kamarei, Fabien Ndagijimana
  • Patent number: 9634619
    Abstract: Improved power amplifier (PA) bias circuit having parallel emitter follower. In some embodiments, a bias circuit for a PA can include a first bias path implemented to couple a base node of an amplifying transistor and a supply node, with the first bias path being configured to provide a base bias current to the base node. The PA can further include a second bias path implemented to be electrically parallel with the first bias path between the base node and the supply node. The second bias path can be configured to provide an additional base bias current to the base node under a selected condition.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: April 25, 2017
    Assignee: Skyworks Solutions, Inc.
    Inventors: Michael Lynn Gerard, Ramanan Bairavasubramanian, Dwayne Allen Rowland, Matthew Lee Banowetz
  • Patent number: 9629108
    Abstract: An electronic device and a bias control method thereof are provided. The electronic device includes a channel quality measuring module configured to measure a channel quality of a received signal, a bias offset determining module configured to determine a bias offset based on the measured channel quality, a bias offset applying module configured to modify a bias by applying the determined bias offset to a specified bias value, and a power amplifier configured to amplify transmission power according to the modified bias.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: April 18, 2017
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Seong Jun Song, Kyung Jung Kim, Won Gon Park
  • Patent number: 9602058
    Abstract: Aspects of the disclosure provide a circuit that includes an envelope processing circuitry and a voltage modulator. The envelope processing circuitry is configured to receive a stream of envelope values of a signal for transmission and output a supply modulation signal in response to the stream of envelope values based on an average-power-tracking (APT) calibration. The voltage modulator is configured to modulate a supply voltage to an amplifier according to the supply modulation signal. The amplifier operates under the supply voltage to amplify the signal for transmission.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: March 21, 2017
    Assignee: Marvell International Ltd.
    Inventors: Qiang Li, Alexander Zaslavsky, Brian T. Brunn