Having Harmonic Radiation Suppression Patents (Class 455/114.1)
  • Patent number: 11996815
    Abstract: Disclosed examples include an apparatus. The apparatus may include a differential signal path portion, a first circuit, and a second circuit. The first circuit may be arranged at the differential signal path portion to set a differential impedance of the differential signal path portion. The second circuit may be arranged outside of the differential signal path portion to set a common-mode impedance of the differential signal path portion lower than the differential impedance.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: May 28, 2024
    Assignee: Microchip Technology Incorporated
    Inventors: Steven Vida, David Gammie
  • Patent number: 11903011
    Abstract: Disclosed are techniques for performing wireless communication. In some aspects, a wireless communication device may receive a signal transmission from a base station and determine a non-linear distortion power measurement associated with the signal transmission and a thermal noise power measurement associated with the signal transmission. The wireless communication device may transmit an indication of at least one of the non-linear distortion power measurement and the thermal noise power measurement to the base station.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: February 13, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Igor Gutman, Navid Abedini, Pushkar Bajirao Kulkarni, Joseph Patrick Burke, Tao Luo
  • Patent number: 11804804
    Abstract: One embodiment is a reconfigurable mixer topology for selectively implementing one of a harmonic rejection mixer (HRM) and a subharmonic mixer (SHM), the reconfigurable mixer topology comprising a mixer core comprising a plurality of differential mixers each having a first clock input and a second clock input; a clock generator for generating a plurality of clock signals each having a different phase; and a clock distributor for distributing the plurality of clock signals to the first and second clock inputs of the differential mixers in accordance with a designated operation of the reconfigurable mixer as an HRM or an SHM.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: October 31, 2023
    Assignee: Analog Devices, Inc.
    Inventors: Peter Delos, Ed Balboni
  • Patent number: 11722144
    Abstract: An interleaved analog-to-digital conversion (ADC) system may have timing errors in a time domain that is corrected using phase compensation in a phase domain. The ADC system may include sub-ADCs, each receiving a clock signal, which is associated with a representation of a timing skew value, reflecting an undesired timing error. A mixer may have sub-mixers, each receiving a sub-ADC output signal and a compensated numerically controlled oscillator (NCO) value. A combiner may combine the sub-mixer output signals. A decimator may decimate the output of the combiner. Each timing skew value is in a time domain. A compensated NCO value is determined using a respective phase skew value. Each phase skew value is an offset value in phase and is not a value in time. Each phase skew value in a phase domain compensates the respective timing skew value in a time domain. Multiple ADC systems and methods are described.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: August 8, 2023
    Assignee: JARIET TECHNOLOGIES, INC.
    Inventors: Claire Huinan Guan, Scott R. Powell, Sean Wen Kao, Leo Ghazikhanian
  • Patent number: 11665809
    Abstract: A high-frequency power circuit includes a first antenna circuit and a second antenna circuit that are connected in parallel to a matching box connected to a high-frequency power supply. The first antenna circuit include a first antenna, a first distribution capacitor, and a first variable capacitor. The second antenna circuit includes a second antenna, a second distribution capacitor, and a second variable capacitor. A controller sets a capacitance of the first variable capacitor based on a detection result of a phase difference between current and voltage in a series-connected portion of the first antenna and the first variable capacitor during plasma production to reduce this phase difference and sets a capacitance of the second variable capacitor based on a detection result of a phase difference between current and voltage in a series-connected portion of the second antenna and the second variable capacitor during plasma production to reduce this phase difference.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: May 30, 2023
    Assignee: ULVAC, INC.
    Inventors: Kenta Doi, Toshiyuki Nakamura
  • Patent number: 11277100
    Abstract: A multiple-stage amplifier includes a driver stage die and a final stage die. The driver stage die includes a first type of semiconductor substrate (e.g., a silicon substrate), a first transistor, and an integrated portion of an interstage impedance matching circuit. A control terminal of the first transistor is electrically coupled to an RF signal input terminal of the driver stage die, and the integrated portion of the interstage impedance matching circuit is electrically coupled between a current-carrying terminal of the first transistor and an RF signal output terminal of the driver stage die. The second die includes a III-V semiconductor substrate (e.g., a GaN substrate) and a second transistor. A connection, which is a non-integrated portion of the interstage impedance matching circuit, is electrically coupled between the RF signal output terminal of the driver stage die and an RF signal input terminal of the final stage die.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: March 15, 2022
    Assignee: NXP USA, Inc.
    Inventors: Joseph Gerard Schultz, Enver Krvavac, Olivier Lembeye, Cedric Cassan, Kevin Kim, Jeffrey Kevin Jones
  • Patent number: 11070173
    Abstract: A wideband power amplifier is presented. The wideband power amplifier configured to be coupled to a load having an impedance ZL, where the wideband power amplifier comprises: a quadrature coupler; a carrier amplifier coupled to the quadrature coupler; a peak amplifier coupled to the quadrature coupler; wherein the carrier amplifier saturates at an input power level lower than the input power level at which the peak amplifier saturates; wherein each of the carrier amplifier and the peak amplifier has a termination impedance of approximately Ropt, where Ropt is the optimum impedance at which the carrier amplifier and the peak amplifier will deliver rated max powers; a impedance transformer, coupled to the carrier amplifier having a characteristic impedance of 2*Ropt; an impedance transformer, coupled to the peak amplifier and the impedance transformer; wherein the impedance transformer is configured transform a load impedance ZL to 2*Ropt.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: July 20, 2021
    Assignee: Honeywell International Inc.
    Inventors: Manoj Kumar Kori, Alfonso Malaga, Anjaya Chary Boddupally, Narayan Singh Rana
  • Patent number: 11057125
    Abstract: Various approaches to implementing digital loopback in a radio frequency (RF) system are disclosed. An example RF system includes a receiver that includes an ADC and a transmitter that includes a DAC. The apparatus includes multiple digital loopback circuits provided at different points between the digital domain processing of the receiver and the transmitter. Each digital loopback circuit may include a combiner and one or more weighing circuits, which make the circuit programmable. The combiner of a given digital loopback circuit is configured to combine a RX signal and a TX signal at a particular point of the digital domain processing of the receiver and the transmitter where said digital loopback circuit is implemented. The one or more weighting circuits are configured to define the how much of the TX signal and/or RX signal is used for said combination.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: July 6, 2021
    Assignee: ANALOG DEVICES, INC.
    Inventors: Peter Delos, Carroll C. Speir
  • Patent number: 10951183
    Abstract: Power amplifier (PA) output memory neutralization is disclosed, using baseband input/output (I/O) capacitance current compensation. Radio frequency (RF) PAs experience I/O memory effects when used with envelope tracking supply modulation schemes. Envelope tracking supply modulation results in a nonlinear variation of the I/O capacitance. Traditional approaches compensate for such effects with a current provided by a bias circuit which is band-limited. This results in memory effects which distort the amplified signal, becoming more significant as the modulation bandwidth increases. An RF communications system according to embodiments disclosed herein mitigates such memory effects by compensating for the non-linear effect of the I/O capacitance in an RF PA.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: March 16, 2021
    Assignee: Qorvo US, Inc.
    Inventors: George Maxim, Baker Scott, Dirk Robert Walter Leipold, Nadim Khlat
  • Patent number: 10879846
    Abstract: The modulation includes in amplifying the microwave signal phase shifted by a given angle into a first sinusoidal signal, in order to obtain a first amplified signal; and in amplifying the microwave signal phase shifted by the given angle increased by ? into a second sinusoidal signal phase shifted by ? with respect to the first signal, in order to obtain a second amplified signal phase shifted by ? with respect to the first amplified signal; the modulated microwave signal being the sum of the first amplified signal and the second amplified signal.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: December 29, 2020
    Assignee: THALES
    Inventors: Patrick Garrec, Thibaut Despoisse, Anthony Ghiotto
  • Patent number: 10742174
    Abstract: Embodiments of RF amplifiers and RF amplifier devices include a transistor, a multiple-section bandpass filter circuit, and a harmonic termination circuit. The bandpass filter circuit includes a first connection node coupled to the amplifier input, a first inductive element coupled between the first connection node and a ground reference node, a first capacitance coupled between the first connection node and a second connection node, a second capacitance coupled between the second connection node and the ground reference node, and a second inductive element coupled between the second connection node and the transistor input. The harmonic termination circuit includes a third inductive element and a third capacitance connected in series between the transistor input and the ground reference node. The harmonic termination circuit resonates at a harmonic frequency of a fundamental frequency of operation of the RF amplifier.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: August 11, 2020
    Assignee: NXP USA, Inc.
    Inventors: Jeffrey Spencer Roberts, Ning Zhu, Damon G. Holmes, Jeffrey Kevin Jones
  • Patent number: 10581392
    Abstract: A power amplifying device includes a first amplification circuit amplifying a first signal having a first frequency component and a second frequency component; a second amplification circuit amplifying a second signal received through an output node of the first amplification circuit; a filter circuit connected between a ground node of the first amplification circuit and a common ground to pass the first and second frequency components to the common ground through the ground node; and an inverting circuit that phase-inverts a signal including second harmonic components of the first and second frequency components that are received through the ground node of the first amplification circuit and provide the phase inverted signal to the output node of the first amplification circuit.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: March 3, 2020
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Kyu Jin Choi
  • Patent number: 10516492
    Abstract: A remote apparatus includes: a plurality of sub amplification units amplifying radio frequency (RF) signals of different frequency bands, respectively; a test signal generation unit generating test signals of a frequency band for any one sub amplification unit among the plurality of sub amplification units; a conversion unit converting intermodulation (IM) signals generated in response to the test signals into a plurality of conversion IM signals by using a conversion signal of which a frequency is swept; and a control unit determining a degree of an intermodulation distortion by the any one sub amplification unit based on signal levels of the plurality of the conversion IM signals.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: December 24, 2019
    Assignee: SOLiD, INC.
    Inventor: Youngju You
  • Patent number: 10475317
    Abstract: An article proximity indicator including at least one antenna having at least first and second ranges of impedance, the second range of impedance being at least partially different from the first range of impedance, the at least one antenna having a first impedance within the first range of impedance when in proximity to an article having a given dielectric constant and having a second impedance within the second range of impedance and not within the first range of impedance when not in proximity to the article having the given dielectric constant, and a proximity indication generator operable, in response to receiving an indication that the impedance of the at least one antenna has changed from being within the first range of impedance to being within the second range of impedance, for generating an indication indicating that the at least one antenna is not in proximity to the article.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: November 12, 2019
    Assignee: TYCO FIRE & SECURITY GMBH
    Inventors: Alexander Shapira, Max Drankovsky
  • Patent number: 10454153
    Abstract: An access control device including a credential reader circuit structured to enter a standby mode, awaken from the standby mode, and receive data from a nearby credential, and a credential detection circuit. The credential detection circuit includes a memory configured to store program instructions, an antenna circuit, and a processor electrically coupled to the antenna circuit and to the credential reader circuit, wherein the processor configured to execute the stored program instructions to: transmit an energizing signal; receive a modulated energizing signal with the antenna circuit; transmit an activation signal to the credential reader circuit in response to the received modulated energizing signal, wherein the received modulated energizing signal includes I and Q values; receive a false detection signal from the credential reader circuit; and adjust an impedance of the antenna circuit.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: October 22, 2019
    Assignee: Schlage Lock Company LLC
    Inventors: Frank A. Nardelli, Michael Reuter, William B. Ainley
  • Patent number: 10348358
    Abstract: This disclosure describes techniques for implementing and utilizing a transceiver in a communication device that has two separate radio-frequency (RF) power amplifiers that are optimized to transmit signals using separate communication standards. The power amplifiers may be designed to convert a lower-power RF signal into different higher-power signals according to different standard-mandated, output-power limits. In this way, a communication device may arbitrate between two transceiver chains that include respective power adapters in order to convert lower-power RF signals into different higher-power RF signals. The higher-power RF signals may have different output-power levels that are appropriate for the respective communication standards of the separate transceiver chains.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: July 9, 2019
    Assignee: Amazon Technologies, Inc.
    Inventors: Sameet Ramakrishnan, Ravi Ichapurapu, Milos Jorgovanovic
  • Patent number: 10256852
    Abstract: An electronic device is provided. The electronic device includes a communication module and a processor electrically connected to the communication module, wherein the communication module includes an antenna configured to transmit and receive a communication signal, a sensor configured to measure an impedance of the antenna, and a first matching circuit and a second matching circuit electrically connected to the antenna, and the processor is configured to receive information on the impedance of the antenna from the sensor, check control information on at least one of the first matching circuit and second matching circuit corresponding to the impedance of the antenna at least partially based on the received information on the impedance of the antenna, and transmit control information generated at least partially based on the checked control information to at least one of the first matching circuit and the second matching circuit corresponding to the control information.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: April 9, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Hwan Ko, Man Seob Kim
  • Patent number: 10243254
    Abstract: An access control device including a credential reader circuit structured to enter a standby mode, awaken from the standby mode, and receive data from a nearby credential, and a credential detection circuit. The credential detection circuit includes a memory configured to store program instructions, an antenna circuit, and a processor electrically coupled to the antenna circuit and to the credential reader circuit, wherein the processor configured to execute the stored program instructions to: transmit an energizing signal; receive a modulated energizing signal with the antenna circuit; transmit an activation signal to the credential reader circuit in response to the received modulated energizing signal, wherein the received modulated energizing signal includes I and Q values; receive a false detection signal from the credential reader circuit; and adjust an impedance of the antenna circuit.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: March 26, 2019
    Assignee: Schlage Lock Company LLC
    Inventors: Frank A. Nardelli, Michael Reuter, William B. Ainley
  • Patent number: 10003303
    Abstract: An amplifier may include control circuitry that may track a first input signal parameter and, in response, adjust a value of a second input parameter. Input parameter tracking and adjustment may facilitate control of output parameters for the amplifier. For example, an envelope-tracking amplifier may track input signal amplitude and adjust other input parameters in response. The adjustments may facilitate control of output parameters, such as gain or efficiency. The amplifier may further include calibration circuitry to determine adjustment responses to various tracked input parameters.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: June 19, 2018
    Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.
    Inventors: Ali Afsahi, Debopriyo Chowdhury, Rethnakaran Pulikkoonattu, Sraavan Reddy Mundlapudi
  • Patent number: 9900016
    Abstract: An apparatus for compensating for nonlinearities in a DAC caused by variabilities of a power supply. The apparatus may include a power supply, a processing component, and a front-end circuit. The power supply may generate power, where the power includes variabilities in a power. The processing component may generate a digital signal. The front-end circuit may be operatively coupled to the power supply and the processing component. The front-end circuit may receive the power from the power supply, identify the nonlinearities in the power, receive the digital signal from the processing component, and adjust the digital signal for the nonlinearities to obtain an input signal to send to a digital to analog converter (DAC).
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: February 20, 2018
    Assignee: Intel IP Corporation
    Inventors: Stefan Trampitsch, Daniel Gruber
  • Patent number: 9641211
    Abstract: A mobile communication device with an antenna is disclosed. A portion of a metal cover of the mobile communication device can function as an extension of a radiator of the antenna, and the installation of a pair of filters can prevent interference between the low frequency antenna and another antenna. The design of the present invention expands the sensing range of the antenna.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: May 2, 2017
    Assignee: PEGATRON CORPORATION
    Inventors: Chien-Yi Wu, Chi-Min Tang, Yu-Yao Chang, Hau-Yuen Tan, Tse-Hsuan Wang, Chao-Hsu Wu
  • Patent number: 9634773
    Abstract: A method for suppressing harmonic signals includes: mixing a first local oscillation signal with an input signal to obtain a first output signal, and mixing a second local oscillation signal with the input signal to obtain a second output signal, the first output signal including an n-order harmonic signal, n being a positive integer greater than 1; and adding the first output signal and the second output signal to suppress the n-order harmonic signal in the first output signal. The first local oscillation signal and the second local oscillation signal have different mark-space ratios but a same oscillation frequency.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: April 25, 2017
    Assignee: MSTAR SEMICONDUCTOR, INC.
    Inventors: Jun-Xiong Deng, Li-Wei Sheng
  • Patent number: 9634772
    Abstract: A harmonic suppression system, including an interface connector is connected to a common end of a first differential SPMT switch; a control port of the first differential SPMT switch is connected to a control port of a second differential SPMT switch, and a gating throw end of the first differential SPMT switch is separately connected to one end of each LC trap network in a one-to-one correspondence; the control port of the second differential SPMT switch is connected to a baseband chip, each gating throw end of the second differential SPMT switch is separately connected to the other end of each LC trap network in a one-to-one correspondence, and a common end of the second differential SPMT switch is connected to the baseband chip; the baseband chip is connected to an antenna switch; and the antenna switch is connected to a antenna.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: April 25, 2017
    Assignee: Huawei Device Co., Ltd.
    Inventors: Yongchao Wang, Hui Zhang, Feng Dong, Yajun Wang, Yueyun Cheng
  • Patent number: 9614285
    Abstract: An RFID antenna assembly configured to be energized with a carrier signal is disclosed. The RFID antenna assembly includes an inductive component including a loop antenna assembly, at least one capacitive component coupled to the inductive component, and an eddy current trap positioned a predetermined distance from the loop antenna assembly.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: April 4, 2017
    Assignee: DEKA Products Limited Partnership
    Inventor: David Blumberg, Jr.
  • Patent number: 9531419
    Abstract: Methods and systems are provided for multi-chip receivers with loop-through feeds. A receiver that comprises plurality of chips may receive one or more input feeds, with each of the chips generating a corresponding output comprising data (e.g., channels) extracted from the one or more input feeds. Only a first chip may handle reception and/or initial processing of the one or more input feeds, with each one of the remaining chips processing a loop-through feed generated in the first chip, in order to generate the corresponding output of that chip. The loop-through feed may be generated based on the one or more input feeds. In this regard, the loop-through feed may comprise at least one of the one or more input feeds that is partially processed in the first one of the plurality of chips.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: December 27, 2016
    Assignee: MAXLINEAR, INC.
    Inventors: Glenn Chang, Sridhar Ramesh, Curtis Ling
  • Patent number: 9350396
    Abstract: System and methods are provided for reducing signal distortion in wireless communication. An example system includes: an up-converter configured to generate a radio frequency signal based at least in part on a baseband signal for wireless communication and an oscillation signal; an amplifier configured to amplify the radio frequency signal and generate a transmission signal, the transmission signal including a first counter-intermodulation component associated with the up-converter and a second counter-intermodulation associated with the amplifier; and a signal generator configured to output a distortion-cancellation signal to the up-converter to reduce signal distortion associated with the first counter-intermodulation component and the second counter-intermodulation component.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: May 24, 2016
    Assignee: MARVELL WORLD TRADE LTD.
    Inventors: Peichen Jiang, Junxiong Deng, Taotao Yan
  • Patent number: 9331722
    Abstract: This document discusses apparatus and methods for compensating non-linearity of digital-to-time converters (DTCs). In an example, a wireless device can include a digital-to-time converter (DTC) configured to receive a phase data information from a baseband processor and to provide a first modulation signal for generating a wireless signal, a detector configure to receive the first modulation signal and provide an indication of nonlinearities of the DTC, and a pre-distortion module configured to provide pre-distortion information to the DTC using the indication of nonlinearities.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: May 3, 2016
    Assignee: Intel IP Corporation
    Inventors: Ashoke Ravi, Ofir Degani, Hasnain Lakdawala
  • Patent number: 9197465
    Abstract: System and method embodiments are provided for improving power efficiency in an outphasing amplifier with a non-isolating combiner. Some embodiments include a circuit comprising a signal decomposer configured to receive an input signal, a non-isolating combiner coupled to the signal decomposer and configured to provide an amplified output signal corresponding to the input signal, a first power amplifiers (PA) on a first branch between the signal decomposer and the non-isolating combiner, a second PA on a second branch between the signal decomposer and the non-isolating combiner, and a switch on the second branch between the signal decomposer and the second PA. The switch is configured to disconnect the second PA from the signal decomposer upon determining that the input signal is in a first condition, and further configured to connect the second PA to the signal decomposer upon determining otherwise.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: November 24, 2015
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Zhengxiang Ma, Munawar Kermalli
  • Patent number: 9184782
    Abstract: A high-frequency module includes first and second demultiplexers and a band elimination filter. The first and second demultiplexers include common terminals, transmission filters, and reception filters, respectively. In the band elimination filter, a demultiplexer-side terminal is connected to the common terminal of the first demultiplexer. The band elimination filter includes a first pass band, and a second pass band and a stop band that are located adjacent to each other within the first pass band. The band elimination filter is configured so that the second pass band includes the pass band of each of the transmission filter and the reception filter in the first demultiplexer and the stop band includes the pass band of the transmission filter in the second demultiplexer.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: November 10, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Yasumasa Taniguchi
  • Patent number: 9166446
    Abstract: A wireless power transmission controlling apparatus and method are provided. The apparatus includes a power amplifier that receives a source power, amplifies the received source power, and outputs a wireless power transmission signal from the amplified received source power, a band pass filter that filters the wireless power transmission signal, and passes a harmonic wave corresponding to a communication frequency band, and a communication unit that transmits a wireless power transmission control signal using the harmonic wave corresponding to the communication frequency band.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: October 20, 2015
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Woo-Ram Lee, Joon-Il Kim, Sung-Bum Park, Young-Min Lee, Hong-Kweun Kim, Se-Ho Park, Seung-Woo Han
  • Patent number: 9152273
    Abstract: Embodiments of the present disclosure disclose a terminal and method for controlling a screen. The method comprises: during a calling or call originating process of the terminal, determining whether a distance between a specified area and a human body is larger than a distance threshold value based on an electrical signal generated by the screen when the specified area of a screen of the terminal gets close to the human body; controlling the screen to be off if it is determined that the distance is not larger than the distance threshold value, and controlling the screen to be on if it is determined that the distance is larger than the distance threshold value. By adopting the technical solution disclosed in the embodiments of the present disclosure, the on and off status of the screen can be controlled more precisely during the calling or call originating process of the terminal.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: October 6, 2015
    Assignee: XIAOMI INC.
    Inventors: Xinming Shi, Hao Di, Wei Sun
  • Patent number: 9083294
    Abstract: System and method embodiments are provided for a multilevel outphasing amplifier architecture with a non-isolating or lossless combiner. The multilevel outphasing amplifier with lossless combiner improves power efficiency in comparison to outphasing amplifiers with lossless combiners. The multilevel outphasing amplifier applies different voltage levels to the power amplifiers (PAs) of the circuit according to the input signal power range. Additionally, tunable reactive compensation is applied to the compensation components (capacitor and inductor) of the lossless combiner as a function of the multilevel voltage setting of the PAs. The efficiency at the back-off region is improved by varying the compensation elements of the lossless combiner along with the drain voltage to the PAs as a function of the input signal power or amplitude.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: July 14, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventor: Munawar Kermalli
  • Patent number: 9048978
    Abstract: The invention relates to a method and a system for generating clock signals in a wireless communication device. The method includes generating an uncorrected reference clock signal, generating at least one frequency correction value corresponding to a frequency error in the uncorrected reference clock signal, and generating at least one radio frequency clock signal based on the uncorrected clock signal and the at least one frequency correction value, for receiving and transmitting radio frequency signals. The method further comprise generating, independently of the at least one radio frequency clock signal, a baseband timing signal based on the uncorrected reference clock signal and the at least one frequency correction value, for clocking base-band signal processing circuits.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: June 2, 2015
    Assignee: TELEFONAKTIEBOLAGET L M ERISSON (PUBL)
    Inventor: Martin Isberg
  • Patent number: 9037100
    Abstract: A wireless transmitter for resolving gain mismatch of TV band is disclosed. In one embodiment, a wireless transmitter comprises a two-stage 14-path harmonic-rejection mixer to manage harmonic rejection ratio in lower sub-bands, and a two-stage 6-path harmonic-rejection mixer to manage harmonic rejection ratio in upper sub-bands. The gain mismatch is resolved by selecting gain ratios of the first and the second stage of the two-stage 14-path harmonic-rejection mixer and the two-stage 6-path harmonic-rejection mixer.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: May 19, 2015
    Assignee: UNIVERSITY OF MACAU
    Inventors: Ka-Fai Un, Pui-In Mak, Rui Paulo da Silva Martins
  • Patent number: 9037172
    Abstract: To schedule uplink transmission time slots for a collection of mobile communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. A mobile's throughput requirement, the throughput already received over a specified past duration, the system fairness requirement, as well as the amount of data available for transmission are also used for evaluating the priority index.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: May 19, 2015
    Assignee: APPLE INC.
    Inventors: Nimal Senarath, Kelvin Kar-Kin Au, Shalini Periyalwar
  • Publication number: 20150126140
    Abstract: A wireless transmitter for resolving gain mismatch of TV band is disclosed. In one embodiment, a wireless transmitter comprises a two-stage 14-path harmonic-rejection mixer to manage harmonic rejection ratio in lower sub-bands, and a two-stage 6-path harmonic-rejection mixer to manage harmonic rejection ratio in upper sub-bands. The gain mismatch is resolved by selecting gain ratios of the first and the second stage of the two-stage 14-path harmonic-rejection mixer and the two-stage 6-path harmonic-rejection mixer.
    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
  • Publication number: 20150094004
    Abstract: Methods and apparatuses are presented for harmonic reject upconverting a baseband signal using at least one quadrature passive upconversion mixer. In some embodiments, an apparatus may include a first quadrature passive mixer configured to receive a first baseband input and a first LO input, and a second quadrature passive mixer configured to receive a second baseband input and a second LO input. A first output of said first passive mixer may be directly connected to a first output of said second passive mixer and together coupled to a first amplifier input. A second output of said first passive mixer may be directly connected to a second output of said second passive mixer and together coupled to a second amplifier input. The transmitter may be configured to output an upconverted signal with at least one rejected harmonic spurious mixing product based on the first and second amplifier inputs.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 2, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Sameer Vasantlal VORA, Jeremy Darren DUNWORTH
  • Patent number: 8983406
    Abstract: This disclosure relates to a harmonic termination circuit that is separate from a load line. In one embodiment, the load line is configured to match an impedance at the power amplifier output at a fundamental frequency of the power amplifier output and the harmonic termination circuit is configured to terminate at a phase corresponding to a harmonic frequency of the power amplifier output. According to certain embodiments, the load line and the harmonic termination circuit can be electrically coupled to the power amplifier output external to a power amplifier die via different output pins of the power amplifier die.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: March 17, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Guohao Zhang, Hardik Bhupendra Modi, Dinhphuoc Vu Hoang
  • Publication number: 20150063175
    Abstract: According to an embodiment, a wireless communication apparatus includes a clock transmitting unit, a function circuit and a control unit. The clock transmitting unit is configured to transmit a clock signal through one of a plurality of transmission paths. The transmission paths are different from each other. The function circuit is configured to operate in synchronization with the clock signal transmitted by the clock transmitting unit. The control unit is configured to select one of the plurality of transmission paths according to an operation state of the wireless communication apparatus.
    Type: Application
    Filed: February 14, 2014
    Publication date: March 5, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshiaki Yoshihara, Ryuichi Fujimoto
  • Patent number: 8965454
    Abstract: In one embodiment, an amplifier system has a tap, a delay filter, a linearized amplifier, and a hybrid combiner. The tapped portion of an input signal is amplified by the amplifier, the untapped portion of the input signal is delayed by the delay filter, and the combiner combines the resulting amplified, tapped portion and the delayed, untapped portion to generate an amplified output signal. By re-combining the delayed, untapped portion of the input signal with the amplified, tapped portion, the power of the untapped portion is not lost, and the amplifier does not have to compensate for all of the distortion that would otherwise be associated with the total output power level. Such an amplifier system is applicable, for example, in upgrading an existing GSM cell site to support both GSM communications as well as UMTS communications without degrading GSM operations.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: February 24, 2015
    Assignee: Andrew LLC
    Inventors: George P. Vella-Coleiro, Josef Ocenasek, Jeffrey G. Strahler, Christopher F. Zappala
  • Patent number: 8948711
    Abstract: An apparatus and method determine a dielectric access in a portable terminal. The method includes generating a TX signal of a specific frequency band by performing frequency conversion, modulation, and digital/analog conversion. The method also includes detecting the power of the TX signal and converting the detected power using Analog-to-Digital Conversion (ADC). The method further includes loading an ADC table defining values for determining the approach/withdrawal of a dielectric to/from the portable terminal, and comparing the power of the TX signal and the ADC table to determine the approach/withdrawal of a dielectric to/from the portable terminal.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: February 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-Kyun Kang
  • Patent number: 8942649
    Abstract: A method is provided for reducing non-linear effects in an electronic circuit including an amplifier. The method may include receiving a modulated signal at an input of the amplifier, the modulated signal comprising a baseband signal modulated by an oscillator frequency. The method may further include substantially attenuating counter-intermodulation in the modulated signal caused by harmonics of the oscillator frequency and the baseband signal by a resonant circuit. In some embodiments, the resonant circuit may include at least one inductive element and one capacitive element coupled to the at least one inductive element, the at least one inductive element and the at least one capacitive element configured to substantially attenuate counter-intermodulation in the modulated signal.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: January 27, 2015
    Assignee: Intel IP Corporation
    Inventor: Omid Oliaei
  • Patent number: 8913968
    Abstract: A transmitter includes a power amplifier driver to amplify a communication signal and a mixer connected with the power amplifier driver, the mixer to output the communication signal to the power amplifier driver. A capacitor and an inductor connect with the mixer and the power amplifier driver. The capacitor and the inductor create a resonant frequency to attenuate frequency components around a determined order of a local oscillator signal.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: December 16, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmad Mirzaei, Hooman Darabi
  • Patent number: 8903002
    Abstract: A computational processor uses a binary signal, being a set of 1- or 0-valued elements of a same number as a number of elements in an input signal, to generate computational data whose elements are exclusive OR values between each element of the input signal and a corresponding element in the binary signal at a same position. The modulator 13 modulates the input signal and the computational data according to a primary modulation scheme, and generates primary-modulated signals. An IFFT calculator applies an inverse fast Fourier transformation to the primary-modulated signals to generate inverse transformation data. A transmitter generates a baseband signal based on generated inverse transformation data whose peak-to-average power ratio matches a standard, and generates and transmits a transmission signal from the baseband signal and data specifying computations conducted to generate the inverse transformation data that matches the standard.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: December 2, 2014
    Assignee: Icom Incorporated
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 8874031
    Abstract: There is provided a radio power transmitting apparatus including: a power transmitting coil, a band signal generating unit, a reflected signal measuring unit, an oscillator and a communication control unit. The coil is supplied with a signal and transmits the signal to a power receiving coil on a radio power receiving apparatus through magnetic coupling. The generating unit generates a band signal having an allowable transmission band and supplies the band signal to the power transmitting coil. The reflected signal measuring unit measures a reflected signal of the band signal from the power transmitting coil. The oscillator generates a carrier signal having a controllable oscillating frequency. The control unit determines a transmission frequency based on a frequency characteristic of the reflected signal and performs control so that a transmission signal generated by modulating the carrier signal of the transmission frequency is supplied to the power transmitting coil.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: October 28, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroki Kudo, Noritaka Deguchi, Daisuke Takeda, Ren Sakata, Hiroki Shoki
  • Patent number: 8868012
    Abstract: A frequency-multiplied harmonic suppression RF circuit design method includes the steps of defining respective operating frequencies of predetermined major electronic components of the RF circuit to be designed, using these operating frequencies to calculate the values of respective frequency-multiplied harmonics and intermodulation distorsions, designing respective filters subject to the values of the frequency-multiplied harmonics and intermodulation distorsions obtained, calculating the locations of the frequency-multiplied harmonics in the RF circuit under design, installing the designed filters in the calculated locations, and testing and adjusting the installed filters.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: October 21, 2014
    Assignee: Shun-Fu Technology Corp.
    Inventor: Yung-Sheng Huang
  • Patent number: 8868011
    Abstract: Embodiments of apparatuses, methods, and systems for a radio frequency amplification circuit providing for fast loadline modulation are generally described herein. Other embodiments may be described and claimed.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: October 21, 2014
    Assignee: TriQuint Semiconductor, Inc.
    Inventor: Peter V. Wright
  • Patent number: 8855584
    Abstract: The present disclosure relates to transmission circuitry of a wireless communication device. The transmission circuitry includes power amplifier circuitry, an output matching network, and impedance control circuitry. The power amplifier circuitry amplifies a radio frequency (RF) input signal to provide an amplified RF output signal, which is passed through the output matching network and transmitted via one or more antennas. As the center frequency of the RF input signal and conditions of operating parameters change, the impedance control circuitry adjusts the values of one or more variable impedance elements of the output matching network in a desired fashion. The values of the variable impedance elements are adjusted such that the output matching network concurrently and dynamically presents the desired load impedances at the center frequency and at one or more harmonics of the RF input signal to achieve a given performance specification.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: October 7, 2014
    Assignee: Cree, Inc.
    Inventors: Christopher Harris, Raymond S. Pengelly
  • Patent number: 8855585
    Abstract: Apparatus and methods are disclosed related to low-voltage radio transmitters with high spectral purity. One such apparatus includes a baseband path with a predistortion stage, a programmable filter, and an upconverter core. In an embodiment, the programmable filter is placed between the predistortion stage and the upconverter core. In an embodiment, the programmable filter is configured by a controller to reject out-of-band noise introduced at the predistortion stage or earlier.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: October 7, 2014
    Assignee: Analog Devices, Inc.
    Inventor: Antonio Montalvo
  • Patent number: 8855548
    Abstract: This invention discloses a method of communicating with a user including wirelessly broadcasting content which is accessible to a multiplicity of users and which includes at least some non-audio content which is not visible to the users without user actuation and which includes product-specific information, enabling a user to select a portion of the content, responsive to a selection by the user, capturing at least part of the non-audio content, corresponding to the portion of the content selected by the user and employing at least part of the captured content to access a contact using a mobile communicator by initially establishing contact with a non product-specific communication facility and employing product-specific information contained in the non-audio content. A system for communicating with a user is also disclosed.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: October 7, 2014
    Assignee: Nokia Corporation
    Inventors: Michael L. Kagan, David Kamien, Ian Elkan Gamse, Charles Anthony Rose