Pulse Or Interrupted Continuous Wave Modulator Patents (Class 332/106)
  • Patent number: 10200006
    Abstract: Apparatus and method for a radially attachable RF trap attached from a side to a shielded RF cable. In some embodiments, the RF trap creates a high impedance on the outer shield of the RF cable at a frequency of RF signals carried on at least one inner conductor of the cable. In some embodiments, an RF-trap apparatus for blocking stray signals on a shielded RF cable that has a peripheral shield conductor and a inner conductor for carrying RF signals includes: a case; an LC circuit having a resonance frequency equal to RF signals carried on the inner conductor; projections that pierce and connect the LC circuit to the shield conductor; and an attachment device that holds the case to the cable with the LC circuit electrically connected to the shield conductor of the shielded RF cable.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: February 5, 2019
    Assignee: Life Services, LLC
    Inventors: Matthew T. Waks, Scott M. Schillak, Charles A. Lemaire
  • Patent number: 9858902
    Abstract: A data processing system comprising a transpose system configured to receive video ordered pixel data and to generate bit plane blocks of data. A write buffer configured to receive the bit plane blocks of data and to generate bit plane data frames. A memory controller configured to receive the bit plane data frames and to write a first bit plane data frame to a memory while simultaneously reading a second bit plane data frame from memory. A read buffer configured to receive the second bit plane data frame and to convert the second bit plane data frame to a digital display device format.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: January 2, 2018
    Assignee: BRASS ROOTS TECHNOLOGIES, LLC
    Inventors: Matthew John Fritz, Bradley William Walker
  • Patent number: 9847895
    Abstract: A transmitting device (20) overlays control information onto information bit stream intended for a receiving device (40) by varying or shifting the modulation index in continuous phase modulation (CPM) waveform. The receiving device (40) detects the modulation index used at the transmitting device (20) to modulate the data burst. The receiving device (40) then determines the control information based on the detected modulation index.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: December 19, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Miguel Lopez, Bo Hagerman, Yi-Pin Eric Wang
  • Patent number: 9252995
    Abstract: The invention refers to switching a physical quantity, wherein the switching is performed by a switching element (SW) according to a control signal received from a control circuit (11), comprising detecting from the control signal (CS) a first number indicative of a time length, and a second number indicative of a point in time, generating a switching signal (S) comprising a switching pulse having a pulse length according to the time length and a pulse position according to the point in time, and providing the switching signal to the switching element (SW). The invention further refers to a power amplifier and to a corresponding computer program.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: February 2, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Roland Peetz
  • Patent number: 8994468
    Abstract: A modulation method is provided. The modulation method includes the steps of receiving multiple sinusoidal signals, obtaining the maximum value of the sinusoidal signals, obtaining the median value of the sinusoidal signals, and obtaining the minimum value of the sinusoidal signals within a period to generate a difference between the maximum value and the minimum value, generating a difference according to an upper limit and a lower limit of a predetermined comparison value, and comparing the two differences to generate an optimized modulation signal.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: March 31, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Shih-Hsiang Chien, Yong-Kai Lin, Chin-Hone Lin
  • Patent number: 8982997
    Abstract: In a method of transmitting a data stream from a transmitter in a multiple-input-multiple-output (MIMO) wireless communication system, where the transmitter comprises a plurality of transmit antennas, a discrete Fourier transform (DFT) is applied to the data stream to generate a plurality of symbol sequences; symbols of a first symbol sequence from the plurality of symbol sequences are paired with symbols of a second symbol sequence from the plurality of symbol sequences to generate a plurality of symbol pairs, wherein the pairing results in an orphan symbol; a space-time block code (STBC) is applied to the symbol pairs to generate a plurality of sets of STBC symbols, each set of STBC symbols being associated with a corresponding one of the plurality of antennas; a cyclic delay diversity (CDD) operation is applied to the orphan symbol to generate a plurality of CDD symbols, each CDD symbol being associated with a corresponding one of the plurality of antennas; and each one of the antennas transmits the corres
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: March 17, 2015
    Assignee: Aplle Inc.
    Inventors: Ming Jia, Masoud Ebrahimi Tazeh Mahalleh, Mohammadhaadi Baligh, Hua Xu, Jianglei Ma, Amir Khandani
  • Patent number: 8982933
    Abstract: A communications system includes a target receiver having a passband and configured to receive an intended signal within the passband. The communications system also includes a jammer configured to jam the target receiver from receiving the intended signal. The jammer has at least one antenna, a jammer receiver coupled to the at least one antenna, a jammer transmitter coupled to the at least one antenna, and a controller configured to cooperate with the jammer receiver. The controller is configured to detect the intended signal and to generate an interfering signal comprising a continuous phase modulation (CPM) waveform having a constant envelope so that the interfering signal at least partially overlaps the passband of the target receiver.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: March 17, 2015
    Assignee: Harris Corporation
    Inventor: James A. Norris
  • Patent number: 8909381
    Abstract: An irrigation control device having a modulator that modulates data onto an alternating power signal by distorting amplitude of a first leading portion of selected cycles of the alternating power signal, and permit effectively a full amplitude of the alternating power signal on a following portion of the selected cycles, wherein the first leading portion and the following portion are either both on a high side of a cycle or both on a low side of a cycle of the alternating power signal. The irrigation control device further includes an interface configured to couple the modulator to a multi-wire interface coupled to a plurality of irrigation devices to permit the alternating power signal to be applied to the multi-wire interface.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: December 9, 2014
    Assignee: Rain Bird Corporation
    Inventor: Timothy J. Crist
  • Patent number: 8891665
    Abstract: Parallel/serial conversion is performed on an N (where N is a natural number)-bit first parallel data signal with a first converted clock acquired by multiplying a reference clock by N, and parallel/serial conversion is performed on an (N×K)-bit (where K is a natural number) second parallel data signal with a second converted clock acquired by multiplying the reference clock by N×K.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: November 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshikazu Yamazaki
  • Patent number: 8873669
    Abstract: The present invention provides an adaptable codec for use in a communication system. The adaptable codec is capable of encoding a digital stream to be transmitted according to any one of a number of encoding schemes. A particular encoding scheme may be selected based on information received from a network entity that is separate from the communication system, a user associated with the communication system, a remote communication system with which communications are established, or a combination thereof. Once a particular encoding scheme is selected, an encoder will encode the digital stream to be transmitted, and a packet processor will create packets from the encoded digital stream. The selection of an encoding scheme will generally correspond to a desired quality of experience level.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: October 28, 2014
    Assignee: Apple Inc.
    Inventors: Larry DeWayne Lewis, Ravi Subramanian
  • Patent number: 8811526
    Abstract: A system for communicating modulated EHF signals may include a modulation circuit responsive to a bi-level transmit information signal for generating a transmit output signal. The transmit output signal may have an EHF frequency when the transmit information signal is at a first information state and may be suppressed when the transmit information signal is at a second information state. A transmit transducer operatively coupled to the modulation circuit may be responsive to the transmit output signal for converting the transmit output signal into an electromagnetic signal.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: August 19, 2014
    Assignee: Keyssa, Inc.
    Inventors: Gary D. McCormack, Ian A. Kyles
  • Patent number: 8792585
    Abstract: A rank estimation device in which a load on a rank estimation process can be reduced is provided. The rank estimation device of the exemplary embodiment is characterized by comprising a SNR estimation section which calculates a communication quality value, a channel variation estimation section which calculates a variation value that varies at a receiver, and a simplified rank estimation section which estimates a transmission rank based on the communication quality value calculated by the SNR estimation section and the variation value calculated by the channel variation estimation section.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: July 29, 2014
    Assignee: NEC Corporation
    Inventor: Masahito Sakai
  • Patent number: 8787494
    Abstract: Methods and apparatus are disclosed for predistorting an input signal to compensate for non-linear distortions introduced by an electronic device, for example, a power amplifier. The non-linear effects of a power amplifier can be modeled using different behavior models. Coefficients for one behavior model can be converted into coefficients for a different behavior model using a conversion function. A conversion circuit implementing the conversion function can be used in between a predistorter and an adaptation circuit that use different models.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: July 22, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Chunlong Bai
  • Patent number: 8755455
    Abstract: Adjusting a Modulation and Coding Scheme (MCS) or more generally, Layer One parameters, for a data packet based on packet information and priority is disclosed. The packet information can typically be extracted from the packet's header. Considering packet-specific information enables cross-layer optimization that can include consideration of packet error rate (PER) constraints, delay constraints, relative importance of packets within a data stream, beamforming (e.g., off or on, implicit or explicit—longer distances are more likely to merit implicit beamforming) constraints, and aggregation as a function of MCS or channel condition (more aggregation is generally desirable for higher MCS or better channels), to name several examples. It is also possible to differentiate drop probability based on the importance of frames like anchor frames, etc.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: June 17, 2014
    Assignee: Quantenna Communications Inc.
    Inventors: Sam Heidari, Rajkumar Samuel, Sigurd Schelstraete
  • Patent number: 8743997
    Abstract: A method and system are described for adaptively adjusting data communication of a rateless coding system, including adaptively estimating a symbol coding length, determining a symbol threshold, determining if the adaptively estimated symbol coding length is less than the symbol threshold, adjusting a transmission power level based on the second determining act and adaptively adjusting a modulation scheme based on the second determining act. Also described are a method and system for decoding communication of a rateless coding system, including receiving encoded symbols, determining if a length of the received encoded symbols is greater than a threshold number of encoded symbols and decoding the received encoded symbols if the length of the received encoded symbols is greater than the threshold number of encoded symbols.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: June 3, 2014
    Assignee: Thomson Licensing
    Inventors: Chia-Han Lee, Wen Gao
  • Patent number: 8729965
    Abstract: An amplifier circuit includes a modulation signal generating circuit, a driving stage circuit and an output stage circuit. The modulation signal generating circuit generates a pair of modulation signals according to a pair of differential input signals and a pair of clock signals. The pair of clock signals includes a first clock signal and a second clock signal having a phase difference therebetween. The driving stage circuit generates a pair of driving signals according to the pair of modulation signals. The output stage circuit generates a pair of amplified output signals according to the pair of driving signals.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: May 20, 2014
    Assignee: Princeton Technology Corporation
    Inventors: Wei-Zen Chen, Chun-Pao Lin
  • Patent number: 8711956
    Abstract: A communications system may include a first communications device that may include a transmitter and a modulator cooperating therewith to modulate a coded waveform using a constant phase modulation (CPM) to generate a non-linear CPM waveform, and generate a linear representation of the non-linear CPM waveform, the linear representation including a plurality of pulses. The transmitter and a modulator may further cooperate to remove at least some of the plurality of pulses to define a modified linear representation of the non-linear CPM waveform, and transmit the modified linear representation of the non-linear CPM waveform. The communications system may further include a second communications device that may include a receiver and a single pulse-matched filter linear demodulator cooperating therewith to demodulate the modified linear representation of the non-linear CPM waveform transmitted from the first communications device.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: April 29, 2014
    Assignee: Harris Corporation
    Inventor: Michael A. Wadsworth
  • Patent number: 8704607
    Abstract: The pulse modulated RF power control method includes an output amplitude control step for controlling amplitude of a pulse output, and a duty control step for controlling a duty ratio of the pulse output. The output amplitude control step performs a constant amplitude control to control an amplitude value of the pulse output so that the amplitude value becomes equal to a set amplitude value. The constant amplitude control according to the output amplitude control, for instance, gives a feedback of the amplitude value of the pulse output outputted by the power control, obtains a difference value between the feedback value and the set amplitude value, and controls the amplitude value of the pulse output so that the difference value becomes zero.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: April 22, 2014
    Assignee: Kyosan Electric Mfg. Co., Ltd.
    Inventors: Itsuo Yuzurihara, Yoshihisa Hata
  • Publication number: 20140104892
    Abstract: This invention provides a high speed controller and switching mode power supply. The high speed controller includes PWM control chip, providing high speed PWM function; output circuit: sending out PWM working signal or frequency modulation working signal. FM enhancement network: inducing feedback signals from CFB and VFB circuitry to vary the oscillation frequency of the PWM control chip, and boost up the frequency modulation function. The FM enhancement network is an unique circuitry to alter the operation characteristics of the PWM control chip. In this respect the high speed controller can be regarded as a new PWM/FM controller which can work simultaneously both in PWM mode and in FM mode in accordance to the load conditions of DC/DC converter output. The efficiency of medium to high power supply using the new design as controller IC would increase at least 5% to 8% higher than other power supplies.
    Type: Application
    Filed: October 14, 2012
    Publication date: April 17, 2014
    Applicant: VICTOR ELECTRONICS LTD.
    Inventor: Yiu Kei Lau
  • Patent number: 8670501
    Abstract: Embodiments of the invention provide a DPD system where the transmit reference signal is transformed, including sub-sampling, frequency translation, and the like, to match the feedback signal, which goes thru a similar transformation process, to obtain an error signal. The same transformation is applied to a system model, which may be Jacobian, Hessian, Gradient, or the like, in an adaptation algorithm to minimize error.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: March 11, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Fernando A. Mujica, Lei Ding
  • Patent number: 8654895
    Abstract: A system for decoding frequency modulated signals includes a glue logic module, a key matrix, and a driver coupled to the key matrix. The glue logic module provides a pre-scaled frequency signal, while the key matrix receives the pre-scaled frequency signal. The driver decodes the pre-scaled frequency signal to generate at least one event update corresponding to a frequency of the pre-scaled frequency signal.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: February 18, 2014
    Assignee: STMicroelectronics International N.V.
    Inventors: Ranajay Mallik, Munish Mangal
  • Patent number: 8619849
    Abstract: The invention provides a multi-phase digital pulse width modulator (MP-DPWM) to implement a distribution scheme which applies the duty cycle in the fastest possible manner with restriction on the number of switching actions per phase and cycle, and additionally takes the number of available phases into account. It modulates switching signals according to a duty cycle input command, their previous switching states, and the current switching cycle. The controller is adapted to additionally take the residue of the previous subcycle into account. In the control scheme: each phase is allowed switch up to twice per cycle; only the next phase in the cycle is additionally turned on, at the start of a subcycle, and if a phase is still on at the end of a subcycle it can be kept on for longer, if required.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: December 31, 2013
    Assignee: University of Limerick
    Inventors: Simon Effler, Mark Keith Halton
  • Publication number: 20130301752
    Abstract: A modulated impulse generating apparatus includes a source signal generator that generates a source signal, a first oscillation unit that, when activated, a signal having extracts a desired frequency component from the source signal generated by the source signal generator and causes amplitude of the extracted signal to increase, a second oscillation unit that, receives input of a signal caused to increase by the first oscillation unit, and that, when activated, causes amplitude of the input signal to increase together with the first oscillation unit and outputs a modulated impulse modulated wave, and an activation unit that activates the first oscillation unit after the source signal generated by the source signal generator has been input to the first oscillation unit and activates the second oscillation unit after a certain time period has elapsed and oscillation amplitude of the input signal has increased.
    Type: Application
    Filed: March 25, 2013
    Publication date: November 14, 2013
    Applicant: FUJITSU LIMITED
    Inventor: Takumi Miyashita
  • Patent number: 8576944
    Abstract: A signal transmitting apparatus for orthogonal frequency division multiplexing (OFDM) system comprises a compandor, a predistortor, a power amplifier and a feedback module. The compandor is configured to compress and expand a transmitted signal. The predistortor is configured to perform a predistortion operation on output signals of the compandor. The power amplifier is configured to amplify output signals of the predistortor. The feedback module is configured to adjust parameters of the compandor and the predistortor based on a feedback signal.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: November 5, 2013
    Assignee: Ralink Technology Corporation
    Inventors: Jiunn Tsair Chen, Yun Shen Chang, Chih Hung Lin
  • Patent number: 8559549
    Abstract: The burst oscillation device 20 includes the data generation part 21, the operation part 11, the signal selecting part 40 and the burst generation part 50. The generation part 21 outputs the encoded data encoded based on data for communication. At the signal selecting part 40, the pulse release timing of predetermined repetition period is randomly delayed by the PPM and further delayed randomly by the minimal time by means of the PSK modulation, thereby realizing the decreasing of the peak value of the average power spectral density.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: October 15, 2013
    Assignee: Furukawa Electric Co., Ltd.
    Inventor: Yasushi Aoyagi
  • Patent number: 8553806
    Abstract: Transmitters, receivers and associated methods are disclosed for providing phase and amplitude modulation in a carrier-less communication system (e.g., an ultra-wide band communication system). An approximate quadrature signal is provided by delaying the in-phase signal by an amount determined by various criteria, such as the bandwidths of the component signals, minimizing the mean square error between an approximate quadrature signal and the true quadrature signal, and minimizing the auto-correlation function of the in-phase signal.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: October 8, 2013
    Assignee: Ultrabit Communications LLC
    Inventor: Stephan V. Schell
  • Patent number: 8526530
    Abstract: A method and apparatus for encoding feedback signal is provided. The method includes: encoding feedback signals of three carriers to output a bit sequence; and transmitting the bit sequence on a High Speed-Dedicated Physical Control Channel (HS-DPCCH). The encoding the feedback signals of the three carriers may specifically include: mapping the feedback signals of the three carriers into a codeword, in which the codeword can be selected from a codebook, and codewords in the codebook satisfy a particular code distance relationship. The method for jointly encoding feedback signals of three carriers in a Ternary Cell (TC) mode is provided. Feedback signals are transmitted over a single code channel. Therefore, power overhead is reduced, and system performance is improved.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: September 3, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Shuju Fan, Jing Li, Xueli Ma, Zongjie Wang
  • Patent number: 8520765
    Abstract: There is provided an information processing apparatus, including a data encoding unit that generates an encoded signal in partial response mode having a transmission speed Fb by encoding input data; a clock signal addition unit that synchronously adds a clock signal at frequency Fb having an amplitude value larger than that of the encoded signal to the encoded signal generated by the data encoding unit; and a signal transmission unit that transmits the encoded signal obtained by the clock signal being added by the clock signal addition unit through a predetermined transmission line.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: August 27, 2013
    Assignee: Sony Corporation
    Inventor: Kunio Fukuda
  • Patent number: 8464081
    Abstract: A system and method for communicating information using Layer 1 from a powered device to power source equipment via Ethernet. In one embodiment, Layer 1 information such as power management, classification, temperature, and disconnect information is transmitted from a powered device to power source equipment using an AC signal that has a cycle defining a first time period during which the AC signal is turned on and a second time period during which the AC signal is turned off. A type of information being sent by the powered device can be determined based on characteristic on/off times of the AC signal cycle.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: June 11, 2013
    Assignee: Broadcom Corporation
    Inventors: Asif Hussain, Manisha Pandya
  • Patent number: 8457243
    Abstract: A baseband signal generator (102a) provides a polar signal (A, I p) to a processing sub-unit (704p). The processing sub-unit (704p) receives furthermore feedback signals from a down converting unit (704c) which feedback signals are used to determine the magnitude (B) of the amplified output signal and the actual error phase. The magnitude (A) of the polar signal and the determined magnitude (B) are applied to a comparator (710) having its output connected to the input of a predistortion unit (214, 216). The output of the predistortion unit (214, 216) is connected to the input of a pulse width modulating unit (210, 212) which comprises a mapping unit (210) outputting two constant magnitude signals. The actual error phase and the phase component of the polar signal are used to generate a corrected phase component which is applied to a further mapping unit (202) forming part of a phase modulating unit (202, 204).
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: June 4, 2013
    Assignee: NXP B.V.
    Inventor: Jan S. Vromans
  • Patent number: 8457246
    Abstract: An apparatus and method for amplifying a Transmit (Tx) signal according to an Envelope Tacking (ET) scheme in a wireless communication system are provided. A transmitting end apparatus includes an envelope gain controller for controlling a gain of a digital baseband Tx signal in accordance with power control, a detector for detecting an envelope signal from the digital baseband Tx signal whose gain is controlled, and for shaping on the envelope signal, a first Digital to Analog Converter (DAC) for converting the shaped envelope signal into an analog signal, and an envelope modulator for generating a drain bias of a power amplifier that amplifies a Radio Frequency (RF) Tx signal by using the analog envelope signal. Accordingly, a digital-based ET scheme is implemented, and by using a plurality of shaping tables, efficiency of the ET scheme can be maximized in a transmitting end that uses power control.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: June 4, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Shin-Ho Kim, Hyung-Weon Park
  • Patent number: 8451939
    Abstract: A radio communication apparatus includes a baseband signal generator to generate digital data; a clock generator to generate 2N pulse signals corresponding to the digital data; a selector to select one of the 2N pulse signals; and a short pulse generator to reduce a pulse width of the signal selected by the selector, wherein the 2N pulse signals include a whole-period non-transmission pulse, a whole-period transmission pulse, and 2N-2 partial-period transmission pulses, when the partial-period transmission pulse is selected, a band pass filter outputs a signal that lasts for part of a period having a 1-symbol length, when the whole-period non-transmission pulse is selected, the band pass filter outputs a signal attenuated by offsetting signals corresponding to the whole-period non-transmission pulse, and when the whole-period transmission pulse is selected, the band pass filter outputs a signal that lasts for a whole of the period having the 1-symbol length.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: May 28, 2013
    Assignee: Fujitsu Limited
    Inventor: Yasuhiro Nakasha
  • Publication number: 20130127556
    Abstract: A power amplifier amplifies a radio signal. Negative feedback is applied to a linear amplifier and the linear amplifier receives an envelope signal. A pulse current modulator is connected to a power supply terminal of a power amplifier and an output terminal of the linear amplifier via an inductor, and outputs a pulse current according to a control signal generated from the envelope signal. A diode has an anode connected to an output terminal of a direct current source and a cathode connected to an output terminal of the pulse current modulator. A switching element is disposed between the output terminal of the direct current source and a ground potential, and is controlled by the control signal.
    Type: Application
    Filed: April 26, 2011
    Publication date: May 23, 2013
    Applicant: NEC Corporation
    Inventor: Shinichi Hori
  • Patent number: 8427242
    Abstract: A method for generating an UWB pulses based on LC oscillator topology. Fast turn on of the oscillator is achieved by creating large asymmetry in a normally symmetrical topology which is used in a typical differential type oscillator. One method for achieving large asymmetry is activating one branch of a differential pair of branches for a short duration before activating both branches in a normal operation. The bandwidth of the pulse is controlled by modifying the duration of the oscillator activation. Fast turn on and turn off is essential for high bandwidth generation. The method is adaptable for generating binary phase shift keying (BPSK) modulation. Selecting the activated branch of a fully symmetrical topology controls the output phase and creates two possibilities which differ exactly by 180 degrees. In a preferred embodiment, all the pulse generator components are on-clip leading to a low cost solution. The circuit can generate high power pulses directly on a load.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: April 23, 2013
    Assignee: Zebra Enterprises Solutions Corp.
    Inventors: Dani Raphaeli, Guy Shasha
  • Publication number: 20130033319
    Abstract: An amplifier circuit includes a modulation signal generating circuit, a driving stage circuit and an output stage circuit. The modulation signal generating circuit generates a pair of modulation signals according to a pair of differential input signals and a pair of clock signals. The pair of clock signals includes a first clock signal and a second clock signal having a phase difference therebetween. The driving stage circuit generates a pair of driving signals according to the pair of modulation signals. The output stage circuit generates a pair of amplified output signals according to the pair of driving signals.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 7, 2013
    Applicant: PRINCETON TECHNOLOGY CORPORATION
    Inventors: Wei-Zen CHEN, Chun-Pao LIN
  • Patent number: 8358720
    Abstract: A communication device according to the present invention includes a controller 10 configured to send a PN code (A) to a transmission and reception unit 20-1 and send a PN code (B) to a transmission and reception unit 20-n (n?1), a transmission system characteristic data acquiring unit 40 configured to acquire reference transmission system characteristic data indicating the characteristic of the PN code (A) sent to the transmission and reception unit 20-1 and acquire transmission system characteristic data indicating the characteristic of the PN code (B) sent to the transmission and reception unit 20-n (n?1), a transmission characteristic difference data calculator 41 configured to acquire a transmission characteristic difference data indicating a difference in transmission characteristic between the transmission and reception unit 20-1 and the transmission and reception unit 20-n (n?1) on the basis of the reference transmission system characteristic data and the transmission system characteristic data, and a
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: January 22, 2013
    Assignee: Kyocera Corporation
    Inventor: Takanori Tanaka
  • Patent number: 8351480
    Abstract: A pulse width modulation method for controlling the output power of a pulsed gas discharge laser powered by a pulsed RF power supply comprises delivering a train of digital pulses to the RF power supply. Each pulse in the train has an incrementally variable duration. The power supply is arranged to deliver a train of RF pulses corresponding in number and duration to the train of digital pulses received. The average power in the RF-pulse train can be varied by incrementally varying the duration of one or more of the digital pulses in the digital pulse train. The train of RF pulses is used to power a gas discharge laser. The gas discharge laser outputs a pulse train corresponding to the RF pulse train.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: January 8, 2013
    Assignee: Coherent, Inc.
    Inventor: David John Allie
  • Patent number: 8325847
    Abstract: The present invention efficiently stores a training sequence in a communications system, where the training sequence exhibits certain desirable characteristics when used by a peak to average power constrained modulation format.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: December 4, 2012
    Assignee: Intel Corporation
    Inventors: Mithat C. Dogan, Mitchell D. Trott
  • Patent number: 8315562
    Abstract: A method for improving RFID readers includes transmitting an outgoing RF signal to an antenna through a directional device, and generating a demodulated vector signal from an RF signal related to the RF signal received from the receiver. The method also includes setting the impedance of a controllable-variable-reflectance element with control-parameters from a memory circuit. The memory circuit includes a look up table having therein a corresponding relationship between the control-parameters and an error vector related to the demodulated vector signal.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: November 20, 2012
    Assignee: Symbol Technologies, Inc.
    Inventors: Mark Duron, Richard T. Knadle, Jr.
  • Patent number: 8290084
    Abstract: A circuit is designed with a matched filter circuit including a plurality of fingers (700, 702, 704) coupled to receive a data symbol. Each finger corresponds to a respective path of the data symbol. Each finger produces a respective output signal. A plurality of decoder circuits (706, 708, 710) receives the respective output signal from a respective finger of the plurality of fingers. Each decoder circuit produces a respective output signal. A joint detector circuit (1310) is coupled to receive each respective output signal from the plurality of decoder circuits. The joint detector circuit produces an output signal corresponding to a predetermined code.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: October 16, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Timothy M. Schmidl, Chaitali Sengupta
  • Patent number: 8289097
    Abstract: The invention provides a method and a modulation circuit for pulse width modulation with feedback, wherein a pulse width modulated signal is provided on the basis of an input signal and a reference signal that is periodic and has a reference frequency. The pulse width modulated signal is provided in that an output signal is switched from a first voltage level to a second voltage level in dependence on a comparison between the input signal and the reference signal at least once in every cycle of the reference signal, and in that at least once at a fixed moment in time in every cycle the pulse width modulated signal is switched from the second voltage level to the first voltage level. Furthermore, a periodic correction signal is added for compensation of the switching from the second voltage level to the first voltage level in the pulse width modulated signal.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: October 16, 2012
    Assignee: Hypex Electronics B.V.
    Inventor: Bruno Johan Georges Putzeys
  • Patent number: 8284857
    Abstract: A communication system comprises a transmitter configured to binary data and a receiver configured to the data transmitted from the transmitter. The transmitter counts the number of bits of any one of binary value of a data section of the transmission data, and determines whether or not inversion processing should be performed in accordance with the counted number. When performing the inversion processing, the transmitter reverses each bit of the data section of the transmission data, adds inversion information showing that the bits have been reversed, and transmits the transmission data. The receiver receives the transmission data and determines whether or not inversion processing should be performed for the reception data, on the basis of the inversion information of the reception data. When performing the inversion processing, the receiver reverses each bit of the data section of the reception data.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: October 9, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masahiro Nozaki
  • Patent number: 8238495
    Abstract: A method includes a main interference reduction mode for reducing the interference generated by a wideband device toward a narrowband device. The main interference reduction mode is performed within the wideband device and includes at least one of detecting an emission from and a reception performed by the narrowband device. A group of at least one sub-carrier having frequencies interfering with frequencies used by the narrowband device is determined from the detection step. The bits of the punctured stream that correspond to the information carried by the interfering sub-carriers of the group are determined and processed so that the processed bits are mapped into a reference symbol having an amplitude within a threshold of zero.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: August 7, 2012
    Assignee: STMicroelectronics SA
    Inventor: Friedbert Berens
  • Publication number: 20120194288
    Abstract: The invention is an electronic Two-Terminal Modulator. It is used electrically in series between a Power Source and a Target Device, and can modulate the power that is sent to the Target Device, at speeds and with modulating complexity that exceed present capability. The invention includes implementation of the modulator as a unit that is inserted into or appended to another device and is used to modulate the power in the other device.
    Type: Application
    Filed: January 19, 2012
    Publication date: August 2, 2012
    Inventor: Barry M. Laxton
  • Patent number: 8207503
    Abstract: A detector of periodic packets of X photons, each packet having a duration shorter than 0.1 nanosecond, comprising a sensor comprising a semiconductor element of type III-V biased in a negative differential resistance region, said sensor being arranged in a resonant cavity tuned to a multiple of the packet repetition frequency.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: June 26, 2012
    Assignee: European Synchrotron Radiation Facility
    Inventors: José Goulon, Gérard Goujon, Andrei Rogalev, Fabrice Wilhelm
  • Patent number: 8164395
    Abstract: A signal modulator that can control transmission power if level adjustment of a continuous signal from an oscillator is executed is provided. A pulse generator of one example of a signal modulator includes an oscillator, a control signal generator, a multiplier, a filter, and a control section. The oscillator and the multiplier are active circuits formed of active elements. A continuous signal is output from the oscillator and is input to the multiplier and the multiplier intermittently operates by a control signal output from the control signal generator, whereby a pulse signal is generated and the power level is easily adjusted by a signal from the control section.
    Type: Grant
    Filed: December 25, 2008
    Date of Patent: April 24, 2012
    Assignee: Panasonic Corporation
    Inventors: Shigeru Kobayashi, Michiaki Matsuo, Junji Sato
  • Patent number: 8144761
    Abstract: A pulse transmission method for transmitting data by using pulse signals, each having a predetermined pulse width; defining a symbol time at least N times the predetermined pulse width, N being at least 2; defining a basic delay time calculated by dividing the predetermined pulse width by a predetermined integer; placing the pulse signals in the symbol time by delaying the pulse signals by an integral multiple of the basic delay time from start of the symbol time, the number of the pulse signals being k and 0?k?N being satisfied; and transmitting the pulse signals.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: March 27, 2012
    Assignee: Fujitsu Limited
    Inventor: Yasuhiro Nakasha
  • Patent number: 8138825
    Abstract: A multi-chip stack structure and a signal transmission method are disclosed in specification and drawing, where the multi-chip stack structure includes first and second chips. The first chip includes a first inductance coil with a first series capacitor, and the second chip includes a second inductance coil with a second series capacitor. The first and second inductance coils are magnetically coupled to each other. The magnetically coupled inductance coils and the capacitors constitute a coupling filter.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: March 20, 2012
    Assignee: National Taiwan University
    Inventors: Hsin-Chia Lu, Guan-Ming Wu, Chun Pan
  • Patent number: 8102202
    Abstract: A modem unit includes a first semiconductor die that includes a power management unit and an embedded flash memory. A mobile communication unit includes a modem unit residing on a first semiconductor die. The first semiconductor die also includes a power management unit and an embedded flash memory.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: January 24, 2012
    Assignee: Infineon Technologies AG
    Inventor: Bernd Wurth
  • Patent number: 8102937
    Abstract: A controller is configured to determine a word in a set of words corresponding to a received coding value, the set of words including at least one data word, at least one modulator command word and at least one gain command word. When the received coding value corresponds to a data word, the controller causes the data word to be modulated. When the received coding value corresponds to a modulator command word, the controller controls a modulator based on the modulator command word. When the received coding value corresponds to a gain command word, the controller controls a gain based on the gain command word.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: January 24, 2012
    Assignee: ST-Ericsson SA
    Inventors: Markus Helfenstein, Harald Bauer, Peter Bode, Rainer Dietsch