Synthesizer Patents (Class 455/76)
  • Patent number: 10727800
    Abstract: This disclosure provides a method for gain control in a wireless receiver. The wireless receiver comprises a first receiver chain adapted to receive a first signal in a first frequency range, a second receiver chain adapted to receive a second signal in a second frequency range, and a common amplifier module operatively connected to the first receiver chain and the second receiver chain. The method comprises determining a first target gain level for a first path comprising the common amplifier module and the first receiver chain, and determining a second target gain level for a second path comprising the common amplifier module and the second receiver chain. The method comprises setting a gain GA of the common amplifier module and a gain GRx1 in the first receiver chain and a gain GRx2 in the second receiver chain based on the first target gain level and the second target gain level.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: July 28, 2020
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Nikolai Kajakine, Peter Jakobsson, Victoria Slavinskaya
  • Patent number: 10680672
    Abstract: A radio-frequency module includes a plurality of inputs and a plurality of outputs, each of at least two of the inputs of the plurality of inputs coupled to a separate output of the plurality of outputs through a separate single-pole-single-throw switch.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: June 9, 2020
    Assignee: Skyworks Solutions, Inc.
    Inventor: Ryan Weichih Ku
  • Patent number: 10652718
    Abstract: The disclosure generally relates to connecting wireless devices based on a correlation between different audio sources. For example, according to various aspects, a first wireless device may capture sound via a microphone and receive audio content from a second wireless device via a wireless receiver. Accordingly, a wireless connection may be established between the first and second wireless devices based on a substantial match between the sound captured via the microphone and the audio content received via the wireless receiver. For example, the sound captured via the microphone may be output from a speaker on the second wireless device. In other examples, the received audio content may be sound captured via a local microphone at the second wireless device. In either case, the correlation between the audio received through the microphone and the audio content received over a radio may substantially simplify the procedure(s) used to connect two audio-enabled devices.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: May 12, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Joel Benjamin Linsky, Brian Arnold Redding
  • Patent number: 10637523
    Abstract: A method for avoiding inter-modulation distortion in a communications apparatus capable of supporting carrier aggregation and communicating with a peer communications apparatus in a wireless network via at least a first CC and a second CC includes: determining a frequency adjustment value for adjusting a first oscillating frequency of a first local oscillation signal utilized for processing an RF signal of the first CC or a second oscillating frequency of a second LO signal utilized for processing an RF signal of the second CC when an RF signal or a baseband signal of the second CC is interfered with by an inter-modulation distortion signal contributed by any signal component related to the first CC; and adjusting the first oscillating frequency or the second oscillating frequency according to the frequency adjustment value.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: April 28, 2020
    Assignee: MEDIATEK INC.
    Inventors: Tzyuan Shiu, Sheng-Che Tseng, Shih-Chieh Yen, Chi-Yao Yu
  • Patent number: 10542494
    Abstract: Where a communications device maintains multiple wireless connections to other devices and networks which use slotted communications protocols, the slots used by those protocols are arranged so as to minimise the power consumed by the device. Where multiple radios are used, power is minimised by avoiding using radios at the same time when those radios are likely to interfere with each other. Slots used by communication protocols can also be selected to maximise the time that the communications device can spend in lower power mode.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: January 21, 2020
    Assignee: Conversant Wireless Licensing S.a.r.l.
    Inventor: Mel Pullen
  • Patent number: 10540526
    Abstract: A polar transmitter for an RFID reader and a system using the polar transmitter are disclosed. An RFID system according to at least some embodiments of the invention includes a polar transmitter, a receiver to receive responses from RFID tags, and a coupler connected to the polar transmitter, the receiver and one or more antennas. In at least some embodiments, the polar transmitter of the RFID system includes an envelope amplifier with a multi-phase buck converter to provide an envelope signal and a phase modulator connected to a power amplifier to phase modulate the power amplifier using a phase signal. In at least some embodiments, the polar transmitter of the RFID system transmits OPR-ASK signals to reduce AM modulation depth and provide a continuous phase signal for the phase modulator.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: January 21, 2020
    Assignee: Clairvoyant Technology LLC
    Inventor: Thomas J. Frederick
  • Patent number: 10116290
    Abstract: According to one embodiment, a frequency doubler circuit includes a first field effect transistor (FET) having a first gate, a first source, and a first drain and a second FET having a second gate, a second source, and a second drain, where the first gate of the first FET and the second source of the second FET are driven by an input signal in a first phase, and the first source of the first FET and the second gate of the second FET are driven by the input signal in a second phase, where the first and the second FETs are caused to switch based on the first phase and the second phase of the input signal respectively to generate an output signal at the first drain and the second drain having a frequency that is approximately double of the input signal.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: October 30, 2018
    Assignees: SPEEDLINK TECHNOLOGY INC., GEORGIA TECH RESEARCH CORPORATION
    Inventors: Hua Wang, Taiyun Chi, Sensen Li, Thomas Chen
  • Patent number: 9966900
    Abstract: An apparatus includes a first oscillator to generate an output signal that has a first frequency. The apparatus further includes a second oscillator to generate an output signal that has a second frequency. The second frequency varies as a function of temperature. The apparatus further includes a controller that counts a number of cycles of the output signal of the second oscillator in order to determine whether to calibrate the first oscillator.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: May 8, 2018
    Assignee: Silicon Laboratories Inc.
    Inventors: Marty Pflum, Arup Mukherji, John M. Khoury
  • Patent number: 9639100
    Abstract: A system and method for controlling a heating, ventilating, and air conditioning (HVAC) system in a dwelling is provided. The system includes a plurality of wireless thermostats disposed throughout multiple zones within the dwelling and operable to control climate conditions in the corresponding zones. The system further includes a primary power source operable to supply power to thermostats for operating in a high-power mode when operatively connected thereto. The thermostats each include a secondary power source operable to supply power to the thermostats for operating in a low-power mode when the corresponding thermostat is not powered by the primary power source. Thermostats operating in the high-powered mode are operable to receive and repeat signals originating from one or more thermostats operating in the low-power mode.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: May 2, 2017
    Assignee: Trane International Inc.
    Inventors: Timothy Wayne Storm, Daniel J. Mitchell
  • Patent number: 9537699
    Abstract: Embodiments of a wireless device and method for transmitting a packet comprising one or more orthogonal frequency division multiplexed (OFDM) transmission symbols are generally described herein. In some embodiments, the wireless device may be configured to map data to active tones and map zeroes to nulled tones of a set of OFDM tones to generate an OFDM symbol comprising both the active and the nulled tones. The number of active and nulled tones may be based on a nulling factor. The OFDM symbol may be down-clocked to generate an OFDM transmission symbol for transmission over a reduced transmission bandwidth. Accordingly, low power may be used for very low data rate transmissions, which may be suitable for sensor devices.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: January 3, 2017
    Assignee: Intel Corporation
    Inventors: Thomas J. Kenney, Eldad Perahia
  • Patent number: 9484987
    Abstract: An information processing apparatus includes a first communication unit, a second communication unit, and a communication-apparatus-side controller. The first communication unit performs wireless communication with plural terminal apparatuses, the number of which is less than or equal to a predetermined maximum number of connections. The second communication unit performs wireless communication with a connection-requesting terminal apparatus that newly attempts to perform wireless communication with the first communication unit. The communication-apparatus-side controller switches the wireless communication via the second communication unit to wireless communication via the first communication unit, the wireless communication via the first communication unit being performed using a dedicated line prepared in advance.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: November 1, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Eiji Nishi
  • Patent number: 9461680
    Abstract: A system includes a first filter circuitry and one or more second filter circuitry. The first filter circuitry can operate at a frequency of a wireless signal to filter the wireless signal to attenuate undesired feedthrough components and pass through a desired component. The system can also include a multi-phase mixer to convert the frequency of the wireless signal to a lower frequency and divide the wireless signal into at least four phase shifted baseband signal components. The second filter circuitry can operate at the lower frequency to filter the phase shifted baseband signal components to attenuate undesired feedthrough components and pass through a desired component. The system can also include a matrix to combine the baseband signal components to form an output signal.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: October 4, 2016
    Assignee: Broadcom Corporation
    Inventors: Alex Ahmad Mirzaei, Hooman Darabi
  • Patent number: 9419673
    Abstract: In the field of millimeter band transmitting/receiving systems for a high-speed contactless transmission, an architecture is provided with a common processing circuit supplying modulation signals and a plurality of transmitting/receiving integrated circuits, all identical to one another, receiving these signals, and also a common clock. The transmitting/receiving integrated circuits each comprise: an oscillator locked with the clock signal to produce a carrier frequency, a transmit channel comprising a first controllable phase shift circuit, a frequency transposition to the carrier frequency, and a power amplifier, a receive channel comprising a low noise amplifier, a frequency transposition from the carrier frequency, and a second controllable phase shift circuit. An antenna is associated with each transmitting/receiving circuit.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: August 16, 2016
    Assignee: Commissariat A L'Energie Atomique et aux Energies Alternatives
    Inventors: Cedric Dehos, Laurent Dussopt, Alexandre Siligaris, Pierre Vincent
  • Patent number: 9401732
    Abstract: Embodiments of the present invention provide a receiver and a receiving method of the receiver, so that monolithic integration of multiple receiving channels can be implemented. The receiver includes: a zero intermediate frequency channel, performing in-phase/quadrature (IQ) down conversion on a radio frequency signal at a first frequency band using a frequency division or frequency multiplication signal of a first oscillation signal; and a superheterodyne channel, performing down conversion on a radio frequency signal at a second frequency band using the frequency division or frequency multiplication signal of the first oscillation signal, where the first frequency band is different from the second frequency band.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: July 26, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zhuobiao He, Jianfeng Wu, Zhengxiang Ma
  • Patent number: 9379718
    Abstract: An all-digital phase-locked loop (ADPLL) is provided. The ADPLL comprises a first circuit and a second circuit. The first circuit is configured to monitor a first signal and set a voltage of a second signal to a voltage within a first voltage range when a code of fine-tuning is equal to a first specified value. The first circuit is configured to set a voltage of a third signal to a voltage within a second voltage range when the code of fine-tuning is equal to a second specified value. The second circuit is configured to increase a code of coarse-tuning when the voltage of the second signal is within the first voltage range, and decrease the code of coarse-tuning when the voltage of the third signal is within the second voltage range. The ADPLL provides a target frequency despite changes in at least one of process, voltage or temperature.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: June 28, 2016
    Assignee: Taiwan Semiconductor Manufacturing Company Limited
    Inventor: Tsung-Hsien Tsai
  • Patent number: 9369261
    Abstract: A circuit for reducing counter-intermodulation in a modulated signal caused by an oscillator frequency and harmonics of a baseband signal is disclosed. The circuit comprises a first and a second baseband section arranged for generating a first and a second version of a baseband signal, the second version being phase shifted with respect to the first version. The circuit further comprises three signal paths comprising mixers for multiplication of the first and second version of the baseband signal with a local oscillator signal, so that three upconverted signals with rotated phase with respect to each other are obtained, and arranged for applying a scaling with a scaling factor corresponding to the rotated phases. The circuit further comprises a combination unit arranged for combining the three upconverted signals.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: June 14, 2016
    Assignees: IMEC, RENESAS Electronics Corporation
    Inventors: Yoshikazu Furuta, Mark Maria Albert Ingels
  • Patent number: 9312827
    Abstract: A device for receiving an Internet radio broadcast is provided. The device comprises a communication interface, at least one input control mounted on the device. a display, and at least one processor in communication with the communication interface, the at least one input control, and the display, and memory containing software executable by the at least one processor.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: April 12, 2016
    Assignee: Black Hills Media, LLC
    Inventors: Safi Qureshey, Daniel D. Sheppard
  • Patent number: 9276591
    Abstract: An endpoint or other communication device of a communication system includes a clock recovery module. The communication device is operative as a slave device relative to another communication device that is operative as a master device. The clock recovery module comprises a clock recovery loop configured to control a slave clock frequency of the slave device so as to synchronize the slave clock frequency with a master clock frequency of the master device. The clock recovery module further comprises a discontinuity detector configured to detect a delay discontinuity in timing messages received in the slave device from the master device, and a loop controller operative to place the clock recovery loop in a particular state responsive to the detected discontinuity.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: March 1, 2016
    Assignee: Alcatel Lucent
    Inventor: Ilija Hadzic
  • Patent number: 9276800
    Abstract: The present invention relates to a single frequency synthesizer based FDD transceiver. A single frequency synthesizer generates and provides a carrier frequency so that frequency up-conversion and frequency down-conversion can be performed at the time of transmission and reception. Accordingly, the area, power consumption, and design complexity of the entire system can be reduced, and the performance of the system can be improved.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: March 1, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyun Ho Boo, Seon-Ho Han, Jang Hong Choi, Ik Soo Eo, Hyun Kyu Yu
  • Patent number: 9209748
    Abstract: A frequency synthesis device including: a first generator configured to generate a periodic signal of frequency f1; a second and third generator, coupled with the first generator and configured to receive as an input the periodic signal of frequency f1 and to generate a signal SG corresponding to a train of oscillations of frequency substantially equal to N·f1, of a time less than T1=1/f1 and repeated periodically at the frequency f1, where N is a whole number greater than 1; and a fourth generator configured to generate, from the signal SG, a periodic signal wherein a frequency spectrum includes a primary line of frequency f2=(N+i)·f1, where i is a whole number.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: December 8, 2015
    Assignee: Commissariat á l'énergie atomique et aux énergies alternatives
    Inventors: Alexandre Siligaris, Clement Jany
  • Patent number: 9203460
    Abstract: According to one embodiment, a transmitter includes a first buffer, a second buffer, a logic circuit, and a class E power amplifier. The first buffer receives a first sinusoidal signal, and converts the first sinusoidal signal to a first rectangular wave signal. The second buffer receives a second sinusoidal signal having a phase delay with respect to the first sinusoidal signal, and converts the second sinusoidal signal to a second rectangular wave signal. The logic circuit receives the first and second rectangular wave signals, and performs logical operation processing on the first and second rectangular wave signals to generate a logic signal with a predetermined duty cycle. The class E power amplifier receives the logic signal, and performs amplification operation based on the logic signal.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: December 1, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yutaka Shimizu
  • Patent number: 9142066
    Abstract: A multi-stage diagnostic system and related method which seeks diagnostic information from a secondary information source when a first information source does not yield sufficient data for producing a diagnostic result. In particular, diagnostic process includes a first stage of communicating with an onboard vehicle computer to retrieve diagnostic trouble codes therefrom. If no diagnostic trouble codes are retrieved from the onboard computer, the diagnostic process proceeds to a second stage wherein symptomatic diagnostic information is solicited from the user. A series of symptomatic questions may be presented to the user on a smartphone. The answers from the symptomatic questions may be used to identify a most likely solution, which may be associated with a repair part(s). The corresponding repair part(s) may be identified by an associated universal part number(s) based on vehicle identification information associated with the vehicle needing repair.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: September 22, 2015
    Assignee: Innova Electronics, Inc.
    Inventors: Ieon C. Chen, Robert Madison, Michael Nguyen
  • Patent number: 9134813
    Abstract: A demodulating system (100) for demodulating a phase-modulated input signal (Si) comprises: a complex demodulator (110), having a first input (111) for receiving the phase-modulated input signal (Si) and being designed to perform complex multiplication of this signal with an approximation of the inverse of the phase modulation; a spectrum analyzing device (130) receiving the demodulated product signal produced by the complex demodulator (110) and capable of analyzing the frequency spectrum of the demodulated product signal.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: September 15, 2015
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Marcel Schemmann, Atanas Pentchev, Carsten Heinks, Aalbert Stek
  • Patent number: 9130646
    Abstract: According to some embodiments, there is provided a signal generating device, including a signal generator and a local signal generating unit. The signal generator generates a signal of a fixed frequency. The local signal generating unit generates, based on the signal of the fixed frequency, a first local signal to convert a frequency of a first signal, and a second local signal to convert a frequency of a second signal. The second signal is a signal resulting from that the first signal is subjected to frequency conversion based on the first local signal and has a frequency different from the first local signal.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: September 8, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroaki Hoshino
  • Patent number: 9118459
    Abstract: A wireless communication device includes a BBIC for performing baseband signal processing, an RFIC for performing radio-frequency signal processing, and a quartz resonator. The RFIC has a storage unit which stores an adjustment value for adjustment of a clock frequency that is based on an oscillation frequency of the quartz resonator, and outputs the adjustment value when its resetting active state is canceled; a frequency adjusting unit for adjusting the clock frequency according to the adjustment value; and an RF signal processing unit which operates based on the clock signal and performs the radio-frequency signal processing.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: August 25, 2015
    Assignee: PANASONIC CORPORATION
    Inventors: Kenji Miyanaga, Noriaki Saito, Takayuki Tsukizawa
  • Patent number: 9100079
    Abstract: A transceiver includes: a first transforming network arranged for using a first input impedance to receive a first modulated signal and using a first output impedance to output a first transformed signal during a transmitting mode of a first communication standard, and for using the first input impedance to receive a second modulated signal and using a second output impedance to output a second transformed signal during the transmitting mode of a second communication standard; a second transforming network arranged for using a second input impedance to receive the second transformed signal and using a third output impedance to output a first RF signal to a connecting port of the transceiver during the transmitting mode of the second communication standard; a power amplifier, arranged to generate a second RF signal; and a switching circuit for selectively coupling the second transformed signal to the second transforming network.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: August 4, 2015
    Assignee: MEDIATEK INC.
    Inventors: Chia-Hsin Wu, Hui-Hsien Liu, Chien-Cheng Lin, Albert Chia-Wen Jerng, George Chien
  • Patent number: 9083437
    Abstract: In an embodiment, a front-end transceiver may be provided. The front-end transceiver may include a receiver path, including a first receiver frequency converter configured to convert a received signal with a receiver frequency into a first receiver intermediate signal with a first receiver intermediate frequency; and a receiver direct conversion stage coupled to the first receiver frequency converter so as to receive the first receiver intermediate signal.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: July 14, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: Kiat Seng Yeo, Jian Guo Ma
  • Patent number: 9071252
    Abstract: According to one embodiment, an analog unit performs frequency conversion of a reception signal. A digital unit performs demodulation processing of the reception signal subjected to the frequency conversion by the analog unit. A PLL circuit generates a clock of the digital unit. A PLL-setting changing unit performs, based on the reception signal, a setting change of parameters of the PLL circuit to thereby control the jitter of the clock.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: June 30, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazumi Sato, Yosuke Ogasawara
  • Patent number: 9042854
    Abstract: Apparatus and methods for tuning a voltage controlled oscillator (VCO) are provided. In one aspect, a method of auto-tuning in a phase-locked loop includes generating a VCO clock signal using a VCO coupled to a capacitor array, dividing the VCO clock signal to generate a divided clock signal using a prescaler circuit having a selectable division ratio, controlling a value of the selectable division ratio using a first counter and a second counter of a counter module, generating a phase-frequency detector feedback signal based on a division control signal M and the divided clock signal using the counter module, counting a number of cycles of the divided clock signal that occur during a calibration interval using a cycle counter of a digital processing logic circuit, and determining the value of a capacitor array control signal based on the number of cycles counted during the calibration interval.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: May 26, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Hua Wang, David Steven Ripley, Bryan J. Roll
  • Patent number: 9020011
    Abstract: A transmit (TX) signal path circuit in a multiple-input, multiple-output (MIMO) transceiver responsive to a digital front end (DFE) for generating receive (RX) path phase alignment signals is disclosed. A digital up-conversion block uses a first numerically-controlled oscillator (NCO) for generating digital intermediate frequency (IF) signals for ordinary TX signal generation, and a different, second NCO for generating digital IF signals for RX phase alignment signal generation. An RF up-conversion block uses a TX local oscillator (LO) for generating analog RF signals for ordinary TX signal generation, and a different feedback (FB) LO for generating analog RF signals for RX phase alignment signal generation. Thus, phase alignment of the circuitry used for ordinary TX signal generation is left undisturbed by RX phase alignment signal generation.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: April 28, 2015
    Assignee: PMC-Sierra US, Inc.
    Inventors: Mark Hiebert, Jay Chen
  • Patent number: 9020018
    Abstract: A calibration system may be provided for calibrating wireless communications circuitry in an electronic device during manufacturing. The calibration system may include data acquisition equipment and calibration computing equipment for receiving and processing test and calibration signals from wireless communications circuitry to be calibrated. During testing and calibration operations, a device may be provided with initial pre-distortion calibration values. The initial pre-distortion calibration values may be generated at least in part based on calibration operations performed for other wireless electronic devices. The device may generate a test signal using the initial pre-distortion calibration values. The calibration system may determine whether the test signal is within an acceptable range of a known reference signal.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: April 28, 2015
    Assignee: Apple Inc.
    Inventors: Gary Lang Do, David A. Donovan, Gurusubrahmaniyan Radhakrishnan
  • Patent number: 9007131
    Abstract: A frequency-control circuit includes a phase frequency detector configured to receive a reference frequency signal and generate an output detection signal. The phase frequency detector can be configured to detect a difference in phase and frequency between the reference frequency signal and a feedback of the output frequency signal. The frequency-control circuit also includes a frequency divider that is configured to apply a correction voltage to a feedback of the output frequency signal, the correction voltage being a function of a pulling signal having one or more unwanted frequency components. The frequency-control circuit also includes a loop filter configured to filter the output detection signal including the correction voltage and generate a control voltage signal. The frequency-control circuit also includes a voltage-controlled oscillator configured to receive the control voltage signal and generate an output frequency signal.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: April 14, 2015
    Assignee: Broadcom Corporation
    Inventors: Ahmad Mirzaei, Hooman Darabi
  • Publication number: 20150094001
    Abstract: A method and arrangement for transmitting and receiving RF signals, associated with different radio interfaces of communication systems, employ a direct conversion based transceiver which substantially comprises one receive signal branch and one transmit signal branch. Mixing frequencies of the different systems are generated by a single common by use of an output frequency divider in combination with the synthesizer, and by use of filtering corresponding to a system channel bandwidth by means of a controllable low-pass filter operating at baseband frequency.
    Type: Application
    Filed: May 8, 2014
    Publication date: April 2, 2015
    Applicant: Nokia Corporation
    Inventors: Risto Väisänen, Kim Kaltiokallio
  • Publication number: 20150079912
    Abstract: In the field of millimeter band transmitting/receiving systems for a high-speed contactless transmission, an architecture is provided with a common processing circuit supplying modulation signals and a plurality of transmitting/receiving integrated circuits, all identical to one another, receiving these signals, and also a common clock. The transmitting/receiving integrated circuits each comprise: an oscillator locked with the clock signal to produce a carrier frequency, a transmit channel comprising a first controllable phase shift circuit, a frequency transposition to the carrier frequency, and a power amplifier, a receive channel comprising a low noise amplifier, a frequency transposition from the carrier frequency, and a second controllable phase shift circuit. An antenna is associated with each transmitting/receiving circuit.
    Type: Application
    Filed: March 21, 2013
    Publication date: March 19, 2015
    Inventors: Cedric Dehos, Laurent Dussopt, Alexandre Siligaris, Pierre Vincent
  • Patent number: 8977215
    Abstract: A frequency translation device includes a transmit circuit including a first frequency converter configured to convert a signal at a first frequency into a signal at a second frequency. A receive circuit includes a second frequency converter configured to convert a signal at the second frequency into a signal at the first frequency. A detector circuit is configured to determine when the frequency translation device is receiving a signal, and to route the signal to the transmit circuit or to the receive circuit.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: March 10, 2015
    Assignee: Electronic Warfare Associates, Inc.
    Inventors: Carl N. Guerreri, Brady H. Warner, Jr., Paul J. Schick, Oscar A. Fahrenfeld
  • Patent number: 8971825
    Abstract: One embodiment of the present invention provides a synthesizer. The synthesizer includes one or more tunable oscillators, a frequency-dividing circuit coupled to the tunable oscillators, and a multiplexer coupled to the frequency-dividing circuit. The frequency-dividing circuit includes a number of frequency dividers, and is configured to generate a number of frequency-dividing outputs. At least one frequency-dividing output has a different frequency division factor. The multiplexer is configured to select a frequency-dividing output.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: March 3, 2015
    Assignee: Aviacomm Inc.
    Inventors: Shih Hsiung Mo, Yan Cui, Chung-Hsing Chang
  • Patent number: 8954017
    Abstract: A communications device is disclosed that implements a phase-locked-loop to multiply a clock signal provided to a power management unit (PMU) by a variable integer value. Multiplying the PMU clock signal provides a second clock signal where the second clock signal is characterized by a fundamental component with one or more harmonics of the fundamental component that differ from the fundamental component and the one or more harmonics of the PMU clock signal. The fundamental component with one or more harmonics of the second clock signal does not occupy the same communication channel as the transmission communication signal of the communications device. Thus, minimizing the degradation of the transmission communication signal.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: February 10, 2015
    Assignee: Broadcom Corporation
    Inventors: Love Kothari, Ajat Hukkoo, Kerry Alan Thompson
  • Patent number: 8954018
    Abstract: A tunable wideband distribution circuit for transmitting a wireless signal over a transmission line is disclosed. The tunable wideband distribution circuit may include a programmable gain buffer, wherein the gain of the programmable gain buffer is based at least in part on a frequency of the wireless signal. The tunable wideband distribution circuit may also include a tuning element configured to modify an effective impedance of the transmission line based at least on the frequency of the wireless signal, wherein the tuning element is electrically coupled to the transmission line.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: February 10, 2015
    Assignee: Intel IP Corporation
    Inventors: Curtiss Roberts, Rizwan Ahmed, Lillian Lent
  • Patent number: 8914068
    Abstract: An array antenna apparatus in which an SN ratio is improved. Antenna elements having transmission modules, respectively, are arranged in plurality, wherein the plurality of transmission modules respectively have transmission signal generators that each output a transmission intermediate frequency signal, local oscillation signal generators that each output a local oscillation signal, and transmission mixers that each mix the transmission intermediate frequency signal and the local oscillation signal with each other, thereby to carry out frequency conversion to a transmission high frequency signal. A reference signal source inputs a reference signal to the transmission signal generators and the local oscillation signal generators. The transmission intermediate frequency signal and the local oscillation signal are synchronized with each other by the reference signal.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: December 16, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryoji Hayashi, Yoshihito Hirano, Kiyohide Sakai, Mitsuhiro Shimozawa, Akira Inoue, Morishige Hieda, Hiroyuki Joba, Kenichi Tajima, Yoshinori Takahashi, Kazutomi Mori, Tomohiro Akiyama
  • Patent number: 8909164
    Abstract: The invention relates to a radio-frequency circuit comprising: —a control unit; and —a phase-locked loop; wherein the control unit is arranged to determine an offset between an actual value of a reference frequency at the input to the loop on the basis of a measurement of the signal output from the filter of the loop, and a theoretical value of said frequency known to the control unit, via a relation known to the control unit, and to control a correction of said offset.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: December 9, 2014
    Assignee: ST-Ericsson, SA
    Inventor: Franck Castex
  • Patent number: 8880005
    Abstract: A transceiver comprising a first frequency signal generator for generating a reception frequency signal, and a second frequency signal generator for generating a transmission frequency signal. The first frequency signal generator is coupled to the second frequency signal generator to supply the reception frequency signal to the second frequency signal generator as a reference frequency signal.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: November 4, 2014
    Assignee: Intel Mobile Communications GmbH
    Inventors: Guenter Maerzinger, Bernd Adler
  • Publication number: 20140323062
    Abstract: A frequency synthesis device including: a first generator configured to generate a periodic signal of frequency f1; a second and third generator, coupled with the first generator and configured to receive as an input the periodic signal of frequency f1 and to generate a signal SG corresponding to a train of oscillations of frequency substantially equal to N·f1, of a time less than T1=1/f1 and repeated periodically at the frequency f1, where N is a whole number greater than 1; and a fourth generator configured to generate, from the signal SG, a periodic signal wherein a frequency spectrum includes a primary line of frequency f2=(N+i)·f1, where i is a whole number.
    Type: Application
    Filed: November 30, 2012
    Publication date: October 30, 2014
    Applicant: Commissariat a l'energie atomique et aux ene alt
    Inventors: Alexandre Siligaris, Clement Jany
  • Patent number: 8874060
    Abstract: A radio frequency (RF) receiver with frequency planning includes an analog receiver, a digital processor, and a clock synthesizer. The analog receiver has an input for receiving an RF input signal, and an output for providing a digital intermediate frequency (IF) signal. The digital processor has a first input for receiving the digital IF signal, a second input for receiving a clock signal, a signal output for providing an IF output signal, and a control output for providing a clock control signal. The clock synthesizer has an input for receiving the clock control signal, and an output for providing the clock signal, and is controllable to adjust a frequency of the clock signal to a selected one of a predetermined number of frequencies within a predetermined frequency range in response to the clock control signal.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: October 28, 2014
    Assignee: Silicon Laboratories Inc.
    Inventors: Sherry X. Wu, Mustafa H. Koroglu, Alessandro Piovaccari, Ramin K. Poorfard
  • Patent number: 8868013
    Abstract: A signal transmitting apparatus includes a signal distributor, a frequency converter, and a frequency synthesizer. The signal distributor is configured to baseband signals corresponding respectively to a plurality of frequency band. The frequency converter is configured to convert each of the distributed baseband signals into one of a positive frequency signal and a negative frequency signal according to the frequency band. The frequency synthesizer is configured to synthesize the positive frequency signal and the negative frequency signal to generate a transmission signal. Herein, the positive frequency signal and the negative frequency signal are signals included in one predetermined intermediate frequency band.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: October 21, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jinkyu Choi, Hyung-Jung Kim, Seok Seo, Jin-Up Kim
  • Patent number: 8849221
    Abstract: A direct-conversion transmitter including an oscillator, a frequency divider, a transmitter, and a filter is provided. The oscillator generates an oscillating signal with an original frequency. The frequency divider performs frequency dividing on the oscillating signal, so as to generate a carrier signal. The transmitter receives the carrier signal from the frequency divider and generates an output signal based on the carrier signal and a data signal. The filter is coupled between the frequency divider and the transmitter. The filter filters out an interference signal fed-back from the transmitter to the oscillator, wherein the interference signal may cause the oscillating signal to float.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: September 30, 2014
    Assignee: MStar Semiconductor, Inc.
    Inventors: Fu-Cheng Wang, Shuo-Yuan Hsiao, Yuan-Yu Fu, Yao-Chi Wang, Sheng-Che Tseng
  • Patent number: 8831534
    Abstract: A multimode wireless communication device includes a first radio section operably to convert outbound analog baseband signals into first outbound RF signals and to convert first inbound RF signals into inbound analog baseband signals when the wireless communication device is in a first mode of operation and a second radio section that performs similar functions in a second mode of operation. A diplexer section includes a first diplexer for coupling to a first antenna, and a second diplexer for coupling to a second antenna, and that selectively couples the first radio section to one of the first antenna and the second antenna, and that selectively couples the second radio section to one of the first antenna and the second antenna. First and second T/R switches are coupled to the first and second diplexers and to respectively, to the first and second radio sections.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: September 9, 2014
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, Alan Corry, Venkat Kodavati
  • Patent number: 8818282
    Abstract: An integrated circuit is described. The integrated circuit includes a global positioning system core that generates a GPS clock signal using an inductor-capacitor voltage controlled oscillator. The integrated circuit also includes a transceiver core configured to use the GPS clock signal. The transceiver core may not include a voltage controlled oscillator.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: August 26, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Beomsup Kim, Tzu-Wang Pan, Young Gon Kim
  • Patent number: 8817852
    Abstract: A radio frequency equalizer includes a first resistor coupled to an input terminal, a second resistor coupled between the first resistor and an output terminal, a first capacitor, a first inductor, a first switch coupled to the input terminal, the first capacitor and the first inductor, a second switch coupled to the output terminal, the first capacitor and the first inductor, a second capacitor, a second inductor and a third switch coupled to the first resistor, the second resistor, the second capacitor and the second inductor. According to a control signal, the first switch selectively couples the first capacitor or the first inductor to the input terminal, the second switch selectively couples the first capacitor or the first inductor to the output terminal and the third switch selectively couples the second capacitor or the second inductor to the first resistor and the second resistor.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: August 26, 2014
    Assignee: Wistron Neweb Corp.
    Inventor: Yao-Nan Huang
  • Publication number: 20140235182
    Abstract: An RF transceiver apparatus has transmitter circuitry receiving transmission signals at a transmitter baseband frequency and converting the signals to a transmission frequency, and receiver circuitry receiving signals at a reception frequency and converting to a receiver baseband frequency. A first digital local oscillator and a first mixer convert between the transmitter baseband frequency and a transmitter intermediate frequency. A second digital local oscillator and a second mixer convert between a receiver intermediate frequency and the receiver baseband frequency. A third mixer frequency receives a local oscillator signal for frequency conversion between the transmitter intermediate frequency and the transmission frequency. A fourth mixer frequency receives a local oscillator signal for frequency conversion between the reception frequency and the receiver intermediate frequency.
    Type: Application
    Filed: November 20, 2013
    Publication date: August 21, 2014
    Inventors: Srdjan Milenkovic, Robin Miller, Ebrahim Bushehri
  • Patent number: 8811915
    Abstract: A network communication card is provided for facilitating ultra high frequency (UHF) radio communication between a terminal and a base station, the network communication card being in communication with an antenna and comprising a double-sided multilayer printed circuit board (PCB). The PCB comprises a digital interface, a receiver and a transmitter. The digital interface provides communication between the PCB and the terminal. The receiver receives incoming radio signals from the base station and processes the received signals for communication to the terminal via the digital interface. The transmitter transmits outgoing radio signals from the terminal via the digital interface to the base station and includes the following components. A digital synthesizer provides a highly accurate modulated carrier signal. An upconversion circuit increases the frequency of the carrier signal. A filter filters spurious content from the carrier signal.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: August 19, 2014
    Assignee: Psion Inc.
    Inventors: Riyaz Bhanji, Mark Wright, Iain Roy