Using A Particular Modulation (e.g., Phase, Frequency, Or Amplitude) Patents (Class 340/870.18)
  • Patent number: 9672730
    Abstract: An apparatus for diagnosis of a communication channel, wherein a communication signal serves for data transmission and is a frequency-modulated signal. The apparatus includes a receiving circuit, which serves for receiving the frequency-modulated signal. The receiving circuit includes a monitoring unit, which serves for determining a signal parameter of the frequency-modulated signal. The receiving circuit also includes a demodulator, which serves to demodulate the frequency-modulated signal. The receiving circuit also includes a signal processing unit, which is connected with the demodulator and with the monitoring unit, wherein the signal processing unit, at least at times, serves for evaluating the signal parameter of the frequency-modulated signal determined by means the monitoring unit and, at least at times, for evaluating the demodulated signal.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: June 6, 2017
    Assignee: ENDRESS + HAUSER WETZER GMBH + CO. KG
    Inventors: Markus Wohrle, Gunter Klotz, Christoph Horn
  • Patent number: 9531070
    Abstract: A method includes implementing a coupled Voltage Controlled Oscillator (VCO) array with a number of VCOs, and mixing Local Oscillator (LO) signals generated through the number of VCOs of the coupled VCO array with signals from antenna elements of an antenna array to introduce differential phase shifts in signal paths coupled to the antenna elements during performing beamforming with the antenna array. The method also includes accommodating differential coupling between the VCOs to improve immunity to noise and/or interference during the beamforming compared to the VCOs accommodating single-ended coupling therebetween.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: December 27, 2016
    Inventor: Christopher T. Schiller
  • Patent number: 9513328
    Abstract: A pulsed voltage bias method and/or pulsed light bias method may be used to reduce, minimize, and/or eliminate external quantum efficiency measurement artifacts of multi-junction solar cells, for example artifacts caused by the shunt effect. In this manner, multi-junction solar cells may be designed and constructed with improved performance, efficiency, and the like.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: December 6, 2016
    Assignee: Arizona Board of Regents on behalf of Arizona State University
    Inventors: Yong-Hang Zhang, Jing-Jing Li, Swee Hoe Lim
  • Patent number: 9252823
    Abstract: A wireless communication system is disclosed. The system includes a transmitter which includes a data source configured to provide data to be transmitted, a modulator configured to modulate the data, a pre-filter configured to apply a filter to the modulated data generating pre-filtered data, and a transmitter antenna configured to receive the pre-filtered data and to transmit the pre-filtered data, the pre-filter based on a phase compensation topology that is based on channel characteristics between the transmitter and a receiver, the frequency response of the pre-filter based on spectral phase information of the channel such that the frequency response at the receiver is proportional to the magnitude of the channel frequency response.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: February 2, 2016
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Andrew M. Weiner, Amir Dezfooliyan
  • Patent number: 9245697
    Abstract: A detection device that detects resetting of an electric circuit breaker. The electric circuit breaker comprises fixed and moving contacts, the moving contact being movable between an open position and a closed position, a mechanism for separating the contacts, a lever for resetting the mechanism from the open position to the closed position of the moving contact, and an actuator for actuating the separator mechanism, the actuator including an electromagnetic coil and a core movable between an idle position and a working position in which the separating mechanism is actuated, the coil causing the moving core to move from idle position to working position. The detection device may comprise means to generate a resetting indication signal from an electric pulse corresponding to an electric current induced in the coil by the movement of the moving core from its working position to its idle position during resetting of the circuit breaker.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: January 26, 2016
    Assignee: SCHNEIDER ELECTRIC INDUSTRIES SAS
    Inventors: Pascal Houbre, Fabien Odille
  • Patent number: 9151679
    Abstract: In one embodiment, a system comprises a portable computing device comprises a housing, at least one temperature sensitive radio frequency signal source proximate the housing and at least one radio frequency interface to receive a radio signal generated by the at least one temperature sensitive radio frequency signal source.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: October 6, 2015
    Assignee: Intel Corporation
    Inventors: Mark MacDonald, Keith R. Tinsley, Harry G. Skinner
  • Patent number: 9071888
    Abstract: A telemetry system for use in a combustion turbine engine (10) having a compressor (12), a combustor and a turbine (16) that includes a sensor (306) in connection with a turbine blade (301) or vane (22). A telemetry transmitter circuit (312) may be affixed to the turbine blade with an electrical connecting material (307) for routing electronic data signals from the sensor (306) to the telemetry transmitter circuit, the electronic data signals indicative of a condition of the turbine blade. A resonant energy transfer system for powering the telemetry transmitter circuit may include a rotating data antenna (314) affixed to the turbine blade or on a same substrate as that of the circuit. A stationary data antenna (320) may be affixed to a stationary component such as a stator (323) proximate and in spaced relation to the rotating data antenna for receiving electronic data signals from the rotating data antenna.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: June 30, 2015
    Assignees: Siemens Aktiengesellschaft, ARKANSAS POWER ELECTRONICS INTERNATIONAL, INC
    Inventors: Ramesh Subramanian, Anand A. Kulkarni, David J. Mitchell, Bjoern Karlsson, Rod Waits, John R. Fraley
  • Patent number: 9055925
    Abstract: Systems and methods of reducing false alarms associated with a vital-sign monitor are disclosed. One or more data samples of a vital sign of a patient are generated at a first sampling rate in a normal mode of operation. Whether the one or more data samples satisfy an alert condition is determined. An alert mode of operation is entered into if the alert condition is satisfied. One or more additional data samples of the vital sign are generated at a second sampling rate higher than the first sampling rate in the alert mode.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: June 16, 2015
    Assignee: CAREFUSION 303, INC.
    Inventors: Pierre Paquet, Stephen Lewis
  • 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: 8903012
    Abstract: A new coded continuous phase modulation (CPM) scheme is proposed to enhance physical layer performance of the current DVB-RCS standard for a satellite communication system. The proposed CPM scheme uses a phase pulse design and combination of modulation parameters to shape the power spectrum of CPM signal in order to improve resilience to adjacent channel interference (ACI). Additionally, it uses a low complexity binary convolutional codes and S-random bit interleaving. Phase response using the proposed CPM scheme is a weighted average of the conventional rectangular and raised-cosine responses and provides optimum response to minimize frame error rate for a given data rate.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: December 2, 2014
    Assignee: Hughes Network Systems, LLC
    Inventors: Rohit Seshadri, Mustafa Eroz, Lin-Nan Lee
  • Patent number: 8896461
    Abstract: In a distributed meter data management (MDM) system of a smart grid, a network computing device, such as a network router deployed in the field, may receive data from one or more utility meters, sensors, control devices, or other utility data collection devices that are communicatively coupled to the network computing device. The network computing device may process the data received from the utility data collection devices to generate processed data usable by a consumer. The network computing device may also send data to and/or receive data from a centralized control system, MDM system, and/or smart grid analytic applications at a utility central office. The network computing device may then provide the processed data directly to the consumer, with or without first sending the data to a centralized MDM system of the utility.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: November 25, 2014
    Assignee: Itron, Inc.
    Inventors: Bruce Christopher Angelis, James Alexander Papp, Timothy James Driscoll
  • Patent number: 8890658
    Abstract: An RFID system using an M pulse amplitude modulation (M-PAM) or M quadrature amplitude modulation (M-QAM) scheme using a plurality of load-modulators, a plurality of antennas, and a communication method thereof are provided. The RFID system includes: an RFID tag; and a reader device communicating with the RFID device, wherein the RFID tag includes: N load-modulators an N antennas communicating with the reader device in any one scheme of M-pulse amplitude modulation (M-PAM) and M-quadrature amplitude modulation (M-QAM) in which modulation of an M level is performed and operated corresponding to the M level.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: November 18, 2014
    Assignees: Electronics and Telecommunications Research Institute, Seoul National University of Technology Center for Industry Collaboration
    Inventors: Ji Hoon Bae, Chan Won Park, Hyung Chul Park, Jong Suk Chae, Cheol Sig Pyo
  • Publication number: 20140288393
    Abstract: This disclosure describes a chopper mixer telemetry circuit for use in a wireless receiver. The receiver may be located in an implantable medical device (IMD) or external programmer. The chopper mixer telemetry circuit may include a mixer amplifier that operates as a synchronous demodulator to provide selective extraction of wireless signals received from a transmitter while suppressing out-of-band noise that can undermine the reliability of the telemetry link between an IMD or programmer and another device. The mixer amplifier may utilize parallel signal paths to convert the received telemetry signal into an in-phase (I) signal component and a quadrature (Q) signal component and recombine the I and Q signal components to reconstruct the total signal independently of the phase mismatch between the transmitter and receiver. Each signal path may include a chopper-stabilized mixer amplifier that amplifies telemetry signals within a desired band while suppressing out-of-band noise.
    Type: Application
    Filed: June 4, 2014
    Publication date: September 25, 2014
    Inventors: John J. Grevious, Timothy J. Denison
  • Patent number: 8688291
    Abstract: A vehicle control system for data exchange in a transport system, where a control unit is configured to transfer control commands to a vehicle configured to transfer status messages to the control unit, where a signal generator is connected to a first data line and a second data line and provides a changeover signal, a first switching means is arranged in the control unit and is configured to change positive half-waves of the changeover signal, and a second switching means is arranged in the vehicle and is configured to change negative half-waves of the changeover signal, in a circuit formed by the first and second data lines to transfer binary values back-and-forth between the control unit and the vehicle.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: April 1, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stephan Rupf, Horst Wolf
  • Publication number: 20140015691
    Abstract: An apparatus for diagnosis of a communication channel, wherein a communication signal serves for data transmission and is a frequency-modulated signal. The apparatus includes a receiving circuit, which serves for receiving the frequency-modulated signal. The receiving circuit includes a monitoring unit, which serves for determining a signal parameter of the frequency-modulated signal. The receiving circuit also includes a demodulator, which serves to demodulate the frequency-modulated signal. The receiving circuit also includes a signal processing unit, which is connected with the demodulator and with the monitoring unit, wherein the signal processing unit, at least at times, serves for evaluating the signal parameter of the frequency-modulated signal determined by means the monitoring unit and, at least at times, for evaluating the demodulated signal.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 16, 2014
    Inventors: Markus Wohrle, Gunter Klotz, Christoph Honr
  • Publication number: 20140015690
    Abstract: Medical diagnostic and digital communication methods for processing in a mobile device a DNA, or blood, or heart or glucose, or body temperature or skin, or urine, or another medical device provided signal into a processed signal. Providing processed medical signals to a Code Division Multiple Access (CDMA) processor or to a Orthogonal Frequency Orthogonal Frequency Division Multiplex (OFDM) processor for processing, modulation and transmission of mobile device modulated signals in a wireless system. Processing a touch screen generated signal in mobile device into a touch screen processed signal for control of mobile device. Digital communications to and from a heart pacemaker for wireless mobile diagnostics and control of heart pacemaker.
    Type: Application
    Filed: September 12, 2013
    Publication date: January 16, 2014
    Inventor: Kamilo Feher
  • Publication number: 20130293393
    Abstract: A method for synchronizing data transmitted between at least one transmit terminal (TE) and a receive terminal (TR) via a transmission channel (CD) with unmanaged latency, comprising the steps consisting in: (a) in said or in each transmit terminal, generating at least one synchronization signal (SSYNC) having a known temporal relationship with the time of transmission of at least one data packet (SEEG) to be synchronized; (b) transmitting said or each data packet to be synchronized on said transmission channel with unmanaged latency, and said or each synchronization signal on an auxiliary transmission channel (CS) with managed latency; (c) in said receive terminal, receiving said or each data packet to be synchronized and said or each synchronization signal; and (d) synchronizing said or each data packet received by said receive terminal by means of said synchronization signal. Data acquisition device for carrying out such a method.
    Type: Application
    Filed: April 10, 2013
    Publication date: November 7, 2013
    Inventors: Michael Foerster, Guillaume Charvet, Jean Porcherot
  • Patent number: 8483849
    Abstract: A method for digital data transmission from a sensor to a control unit is described, the sensor values of the sensor being divided for data transmission at different resolutions. The sensor values form a first range of values including successive sensor values. The first range of values for data transmission is divided as a function of a variable relevant for the control unit.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: July 9, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Rolf-Juergen Recknagel, Matthias Wellhoefer
  • Patent number: 8362920
    Abstract: A method and device for locating each of the wheels of a pair of twinned wheels mounted on a vehicle. Each twinned wheel is equipped with an electromagnetic receiving antenna, and these two twinned wheels are provided with elements of relative blocking rotation-wise designed to make it possible to obtain an offset by a predetermined angle (?), such that (?) is different from 0° and 180°, between the receiving antennas with which the two twinned wheels are equipped. The vehicle is equipped with a fixed source of emission of an electromagnetic signal suitable for covering an area passed through by the receiving antennas, and the electromagnetic field received by each of the receiving antennas is measured, so as to deduce, from the analysis of the time offset between the variations of the two measured electromagnetic fields, the location of each of the twinned wheels.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: January 29, 2013
    Assignee: Continental Automotive France
    Inventor: Olivier Gerardiere
  • Patent number: 8254430
    Abstract: A method and apparatus for enabling the operative association of electronic devices that each employ spread spectrum EMI noise reduction. The method includes the detection of frequency modulation and the generation of a modulation detection signal that conveys the modulation extent and type. The modulation detection signal is then used to accommodate the modulation technique and make it compatible with the receiving electronic device. The apparatus of the invention includes an FM modulator that creates an FM signal from an input signal, an FM detector that detects the FM content of the incoming signal and represent this information by means of either voltage or current signals, and a circuit to process this FM information and perform functions such as modification of the FM content and generating a new signal with this new content, complete removal of the content, and “no-action,” whereby the signal is passed on with no alteration to the content.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: August 28, 2012
    Inventor: Narendar Venugopal
  • Patent number: 8217804
    Abstract: The invention provides a method and circuitry for transmitting signals in a frequency-hopping, spread-spectrum, AMR network using mobile receivers operating at greater than 1 milliwatt and providing data profiling data to be read out through an I/O port or transmitted over the RF network, which may use one-way or two-way communication.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: July 10, 2012
    Assignee: Badger Meter, Inc.
    Inventors: Kelly Laughlin-Parker, John Fillinger, Jr.
  • Patent number: 8208581
    Abstract: A process variable transmitter that preferably includes a transmitter output circuit that provides bidirectional HART and controller area network communication transceiver lines. The transmitter output circuit also includes sensor circuit interface contacts. An isolated circuit couples to the sensor circuit interface contacts. The isolated circuit includes sensor circuitry sensing a process variable. The isolated circuit further comprises a galvanic isolation barrier galvanically isolating the sensor circuitry from the HART and controller area network transceiver lines. A stacked power supply provides power management. Other aspects may include a controller area network current limiter diagnostic output, timed sequencing of microcontroller startup and shutdown, a local operator interface and power management.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: June 26, 2012
    Assignee: Rosemount Inc.
    Inventors: Brian Lee Westfield, Kelly Michael Orth
  • Patent number: 8151823
    Abstract: A fluid power valve arrangement with at least one solenoid valve whose solenoid is connected or able to be connected via only two control lines with an electrical control and/or communication device. The solenoid valve has integrated in it a non-volatile storage device containing identification data of the solenoid valve, and furthermore a modulator for modulation of data of the solenoid valve in the two supply lines. The control and/or communication device possesses a demodulator for demodulation of the modulated data.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: April 10, 2012
    Assignee: Festo AG & Co. KG
    Inventors: Martin Gehrke, Helmut Deichert
  • Patent number: 8150563
    Abstract: An anti-theft system, especially in the form of an access and/or starting system for a vehicle has a vehicle-mounted receiver for receiving a request signal containing the instruction to find out whether objects that are associated with the vehicle, e.g. lost identifiers, are located in specific areas of the vehicle. The anti-theft system further has a vehicle-mounted control and evaluation unit for verifying whether the objects are in the specific areas of the vehicle and outputting information on whether an object that is associated with the vehicle has been found. The anti-theft system finally has a vehicle-mounted transmitter for transmitting a result signal containing the information on whether objects have been found. Such an anti-theft system allows an identifier, for example, which is associated with a user, to start a search from a distance in order to verify whether certain objects are located near or inside the vehicle.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: April 3, 2012
    Assignee: Continental Automotive GmbH
    Inventors: Thomas Georgi, Roland Wagner
  • Patent number: 8144815
    Abstract: The communications terminal and acquisition method is for use with Continuous Phase Modulation (CPM) and Phase Shift Keying (PSK) modulation-type signals, each modulation-type signal having a respective preamble phasing sequence. The communications terminal may include a wireless communications device to receive a modulated signal having one of the CPM and PSK modulation types, and having a symbol rate. A controller may be included to cooperate with the wireless communications device to perform a transform process, such as a Fourier Transform (FT) process, on the received modulated signal to detect the modulation type and the symbol rate of the received modulated signal based upon the preamble phasing sequence. Carrier phase and frequency of the received modulated signal may be estimated based upon bin amplitudes. Also, symbol timing may be estimated based upon a phase difference between tones associated with the preamble phasing sequence.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: March 27, 2012
    Assignee: Harris Corporation
    Inventor: James A. Norris
  • Patent number: 8120507
    Abstract: A two-tier communication system for a seismic streamer. The communication system operates over an unshielded twisted-pair communication line extending the length of the streamer. Repeater units having a repeater function and a device controller function divide the twisted pair into line segments. Coils on each segment couple signals inductively to collocated external devices in a low-speed 2400 baud FSK data link between the devices and an associated device controller. A Gaussian 8-level FSK high-speed 60 kbit/s data link is established along all the segments with the repeaters re-transmitting boosted signals along the entire length of the communication line. The coils are transparent at the high-speed data rate. Time division multiple access (TDMA) or frequency division multiple access (FDMA) is used to accommodate the two links on the single twisted pair.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: February 21, 2012
    Assignee: Ion Geophysical Corporation
    Inventors: Robert E. Rouquette, Clem B. Guillot, III, Robert H. Kemp, Jr., Dale J. Lambert, Daniel B. Seale
  • Patent number: 7928832
    Abstract: A method of operating a first RFID read/write device and at least one second RFID read/write device is disclosed herein. The first and second RFID read/write devices respectively comprise an RF part and a baseband part with a digital signal processor. The first and second RFID read/write devices are arranged at a usable wireless transmission distance from one another. The method comprises generating a Reader Service Signal in its baseband form in the signal processor and combining the Reader Service Signal with an RFID signal in its baseband form comprising a carrier signal, so that the RFID signal has the Reader Service Signal embedded to it in amplitude, frequency or phase. Thereafter, the RFID signal with the embedded Reader Service Signal is shifted into an RF band and the RFID signal is transmitted as a transmission signal wirelessly by the RFID read/write devices.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: April 19, 2011
    Assignee: Intermec IP Corp.
    Inventor: Roland Küng
  • Patent number: 7839283
    Abstract: An integrated circuit implements a wireless remote sensor. The wireless remote sensor includes an antenna coupled to an energy distribution unit to allow passive collection of electrical charge. A signal processing unit couples to the energy distribution unit and modulates transmission by the antenna according to a binary code.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: November 23, 2010
    Inventor: Farrokh Mohamadi
  • Patent number: 7832281
    Abstract: A solution for monitoring a property of an object and/or an area using a Micro-ElectroMechanical Systems (MEMS)-based monitoring device is provided. In an embodiment of the invention, the MEMS-based monitoring device includes a MEMS-based sensing device for obtaining data based on a property of the object and/or area and a power generation device that generates power from an ambient condition of the monitoring device. In this manner, the monitoring device can operate independent of any outside power sources or other devices. Further, the monitoring device can include a transmitter that transmits a signal based on the property. The monitoring device can be used to monitor a moving component of a machine, and can be integrated with a health monitoring system of the machine using one or more relay devices.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: November 16, 2010
    Assignee: International Electronic Machines Corporation
    Inventors: Zahid F. Mian, Ryk E. Spoor
  • Patent number: 7821420
    Abstract: A transmission system for a measurement device on a coordinate positioning apparatus comprises a station (18) mounted on the measuring device (10) and a station (20) mounted on the coordinate positioning apparatus (22), wherein the stations communicate with each other using a spread spectrum radio link, for example frequency hopping. The station on the probe sends a regular signal and on receiving the signal the station on the coordinate positioning apparatus synchronises its clock and sends an acknowledgement signal. Measurement data is either sent in the regular signal or in a measurement event driven signal.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: October 26, 2010
    Assignee: Renishaw PLC
    Inventors: Martin Woollett, John Styles, John Liptrot
  • Patent number: 7773715
    Abstract: A process variable transmitter that preferably includes a transmitter output circuit that provides bidirectional HART and controller area network communication transceiver lines. The transmitter output circuit also includes sensor circuit interface contacts. An isolated circuit couples to the sensor circuit interface contacts. The isolated circuit includes sensor circuitry sensing a process variable. The isolated circuit further comprises a galvanic isolation barrier galvanically isolating the sensor circuitry from the HART and controller area network transceiver lines. A stacked power supply provides power management. Other aspects may include a controller area network current limiter diagnostic output, timed sequencing of microcontroller startup and shutdown, a local operator interface and power management.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: August 10, 2010
    Assignee: Rosemount Inc.
    Inventors: Brian Lee Westfield, Kelly Michael Orth
  • Patent number: 7764727
    Abstract: An accurate total error rate performance can be measured using a computed error vector magnitude (EVM) per stream. Using this EVM, the receiver or the transmitter can advantageously generate an optimized modulation and coding scheme (MCS) that corresponds to a specific number of streams, modulation and coding rate for the transmitter. For example, the receiver can compute an SNR from the EVM and then use an SNR vs. MCS table to determine the optimized MCS. In contrast, the transmitter can receive an EVM-to-RSSI mapping and an EVM-to-MCS mapping from the receiver. These mappings and an EVM can facilitate selecting the optimized MCS.
    Type: Grant
    Filed: January 10, 2006
    Date of Patent: July 27, 2010
    Assignee: Atheros Communications, Inc.
    Inventors: Huanchun Ye, Won-Joon Choi, Ning Zhang, Jeffrey M. Gilbert
  • Patent number: 7715892
    Abstract: A compact, solid-state THz source based on the driven Josephson vortex lattice in a highly anisotropic superconductor such as Bi2Sr2CaCu2O8 that allows cw emission at tunable frequency. A second order metallic Bragg grating is used to achieve impedance matching and to induce surface emission of THz-radiation from a Bi2Sr2CaCu2O8 sample. Steering of the emitted THz beam is accomplished by tuning the Josephson vortex spacing around the grating period using a superimposed magnetic control field.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: May 11, 2010
    Assignee: Uchicago Argonne, LLC
    Inventors: Ulrich Welp, Alexei E. Koshelev, Kenneth E. Gray, Wai-Kwong Kwok, Vitalii Vlasko-Vlasov
  • Patent number: 7626511
    Abstract: The invention provides a method and circuitry for transmitting signals in both a narrow band, mobile-receiver type of AMR network and also for operation in the frequency-hopping, spread-spectrum, fixed-receiver type of AMR network. Unlike systems provided with multiple transmitters, the invention provides this in a single transmitter operating with common circuitry to transmit in two modes of transmission in a single operational sequence.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: December 1, 2009
    Assignee: Badger Meter, Inc.
    Inventor: Mark Lazar
  • Patent number: 7529300
    Abstract: Shaped Offset Quadrature Amplitude Modulation (QAM) can be implemented within a communication system. A train or sequence of orthogonal sinc pulses can be generated for each of the in-phase and quadrature signal paths. The sinc pulses in the quadrature signal path can have a predetermined time offset relative to the pulses in the in-phase signal path. An in-phase or quadrature antipodal data signal can be used to modulate the respective sinc pulse train. Each of the in-phase and quadrature pulses can be shaped using a time domain windowing function, such as a Kaiser-Bessel window, to adjust the spectral width and spectral sidelobe level of the signal. The beta parameter of the window can be adjusted to achieve the desired signal response. The timing of the sinc pulses may need to be adjusted following the window function in order to maintain orthogonality of the pulses.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: May 5, 2009
    Assignee: Cubic Corporation
    Inventor: Wayne Edward Richards
  • Publication number: 20090000387
    Abstract: A solution for monitoring a property of an object and/or an area using a Micro-ElectroMechanical Systems (MEMS)-based monitoring device is provided. In an embodiment of the invention, the MEMS-based monitoring device includes a MEMS-based sensing device for obtaining data based on a property of the object and/or area and a power generation device that generates power from an ambient condition of the monitoring device. In this manner, the monitoring device can operate independent of any outside power sources or other devices. Further, the monitoring device can include a transmitter that transmits a signal based on the property. The monitoring device can be used to monitor a moving component of a machine, and can be integrated with a health monitoring system of the machine using one or more relay devices.
    Type: Application
    Filed: July 11, 2008
    Publication date: January 1, 2009
    Inventors: Zahid F. Mian, Ryk E. Spoor
  • Publication number: 20080211688
    Abstract: A method and apparatus for a multi-mode and multi-rate telemetry transmitter includes a digital baseband lineup, a digital-to-analog converter (“DAC”), and an analog reconstruction filter. The digital baseband lineup may be programmed to any desired bit rate, enabling the transmitter to support multi-rate capabilities. Different coefficients and numerical values may be programmed in the digital baseband lineup to support any desired modulation scheme, enabling the transmitter to support multi-mode capabilities. The digital baseband lineup may be designed by implementing up-sampling stages, down-sampling stages, and digital filters in a variety of arrangements.
    Type: Application
    Filed: September 24, 2007
    Publication date: September 4, 2008
    Inventor: Walid Khairy Mohamed Ahmed
  • Patent number: 7412899
    Abstract: A solution for monitoring a property of an object and/or an area using a Micro-ElectroMechanical Systems (MEMS)-based monitoring device is provided. In an embodiment of the invention, the MEMS-based monitoring device includes a MEMS-based sensing device for obtaining data based on a property of the object and/or area and a power generation device that generates power from an ambient condition of the monitoring device. In this manner, the monitoring device can operate independent of any outside power sources or other devices. Further, the monitoring device can include a transmitter that transmits a signal based on the property. The monitoring device can be used to monitor a moving component of a machine, and can be integrated with a health monitoring system of the machine using one or more relay devices.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: August 19, 2008
    Assignee: International Electronic Machines Corporation
    Inventors: Zahid F. Mian, Ryk E. Spoor
  • Publication number: 20080180278
    Abstract: This disclosure describes a chopper stabilized instrumentation amplifier. The amplifier is configured to achieve stable measurements at low frequency with very low power consumption. The instrumentation amplifier uses a differential architecture and a mixer amplifier to substantially eliminate noise and offset from an output signal produced by the amplifier. Dynamic limitations, i.e., glitching, that result from chopper stabilization at low power are substantially eliminated through a combination of chopping at low impedance nodes within the mixer amplifier and feedback. The signal path of the amplifier operates as a continuous time system, providing minimal aliasing of noise or external signals entering the signal pathway at the chop frequency or its harmonics. The amplifier can be used in a low power system, such as an implantable medical device. The amplifier may be used for physiological signal sensing, impedance sensing, telemetry or other test and measurement applications.
    Type: Application
    Filed: January 31, 2007
    Publication date: July 31, 2008
    Applicant: Medtronic, Inc.
    Inventor: Timothy J. Denison
  • Patent number: 7382208
    Abstract: The operating method is based on the simultaneous application of FM and AM. In this process, the fundamental frequency of the AM is derived from at least one, preferably the second, longitudinal mode. In continuous operation of the lamp, the color temperature is set for a prescribed power by setting the AM degree controllably.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: June 3, 2008
    Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen MbH
    Inventor: Klaus Stockwald
  • Patent number: 7324011
    Abstract: A pipeline communication system and method includes a pipeline having a surface extending along at least a portion of the length of the pipeline. A conductive bus is formed to and extends along a portion of the surface of the pipeline. The conductive bus includes a first conductive trace and a second conductive trace with the first and second conductive traces being adapted to conformally couple with a pipeline at the surface extending along at least a portion of the length of the pipeline. A transmitter for sending information along the conductive bus on the pipeline is coupled thereto and a receiver for receiving the information from the conductive bus on the pipeline is also couple to the conductive bus.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: January 29, 2008
    Assignee: Battelle Energy Alliance, LLC
    Inventor: John G. Richardson
  • Patent number: 7265682
    Abstract: Methods and systems employing combined source-channel coding for multi-carrier modulation (MCM). In some embodiments, a described method comprises: estimating channel gain to noise ratio (CGNR) as a function of frequency bin; determining MCM parameters that minimize distortion of one or more telemetry signals; generating a communications signal using the MCM parameters, and transmitting the communications signal via a communications channel. The MCM parameters may be determined by minimizing a telemetry signal distortion measure subject to CGNR and a transmit power constraint. The MCM parameters may further account for differing fidelity requirements when multiple telemetry signals are being transmitted.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: September 4, 2007
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Mahsa Memarzadeh, Wallace R. Gardner, Don Herrick Johnson
  • Patent number: 7193511
    Abstract: A rapid-mounting security monitoring and controlling system is disclosed. Co-axial cable is used to transmit power supply, images, sound, and to control detected signals so as to rapidly installation of wirings for the security monitoring and controlling system. The complexity of wiring installation is improved and the installation cost and the material cost are greatly reduced.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: March 20, 2007
    Assignee: AV Tech Corporation
    Inventor: Chun-Ju Huang
  • Patent number: 7133763
    Abstract: The invention provides a control apparatus comprising a controller for determining a manipulated variable for manipulating a controlled object so that an output of the controlled object converges to a desired value and a modulator for modulating the manipulated variable by using one of a delta-sigma modulation algorithm, a sigma-delta modulation algorithm and a delta modulation algorithm to generate a modulated signal to be applied to the controlled object. The modulator generates the modulated signal so that a center value of an amplitude of the modulated signal follows a change of the manipulated variable. Thus, the modulated signal in which the manipulated variable is reflected without any loss can be generated even when the manipulated variable changes.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: November 7, 2006
    Assignee: Honda Motor Co., Ltd.
    Inventor: Yuji Yasui
  • Patent number: 7102534
    Abstract: An apparatus measures temperature of a reciprocating piston and comprises one or more thermocouples of which one end is inserted to a predetermined point of the piston and generates a potential difference according to temperature of the predetermined point. A telemetry unit is mounted on a big end of a connecting rod, computes the piston temperature on the basis of the potential difference, and wirelessly transmits the piston temperature signal.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: September 5, 2006
    Assignee: Hyundai Motor Company
    Inventor: Kyoung-Pyo Ha
  • Patent number: 7102509
    Abstract: A method for operating with multiple protocols for handling communications comprising the steps of obtaining information from sensors and related input devices utilizing specialized tamper resistant passive transceivers working with active pulse type transceivers to create historical maps of information on people or objects. This includes steps of: a) identifying recording information, b) sending and receiving prompts, c) associating the call with timers, d) monitoring passive transceivers with low level diagnostic information, e) monitoring the transceivers with voice recognition software, f) recording associated data, g) identifying the users, the key words or phrases within the recorded data, h) naming the recording and i) saving the data in a protected format.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: September 5, 2006
    Assignee: Global Tel★Link Corporation
    Inventors: Joseph Anders, Jeremy Birch, Bryan Wilson, Marty Logsdon
  • Patent number: 7084741
    Abstract: A method for communicating between a first station and a second station over a wire pair, in which the first station sends an alternating power signal over the wire pair, the alternating power signal comprising a plurality of communication symbols, the second station receiving the alternating power signal and determining therefrom the communication symbols, the second station drawing current from the alternating power signal in a sequence corresponding to at least one further communication symbol, and the first station determining the current drawn in the alternating power signal to recover the further communication symbol.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: August 1, 2006
    Assignee: Signal Data Systems PTY, Ltd.
    Inventor: Allan P. Plummer
  • Patent number: 7027357
    Abstract: The present invention provides an acoustic transmitter for sequentially transmitting a plurality of pulse signals by sound. Each of the plurality of pulse signals is a signal of at least one modulated carrier wave, which has a predetermined frequency. The carrier wave of each of the pulse signals has a mutually different frequency. The transmitter performs amplitude modulation and/or phase modulation based on transmission information, and modulation by a signal indicating a window function, for the carrier wave of each of pulse signals. Then the transmitter sequentially transmits the plurality of pulse signals by sound.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: April 11, 2006
    Assignee: Tokyo Gas Co., Ltd.
    Inventors: Hirohisa Sakuma, Jun Fujiwara
  • Patent number: 7016403
    Abstract: An apparatus and method for determining the quality of a digital signal. The incoming digital signal is sampled with a number n of samples per defined pulse width, where N is greater than or equal to one, using clock cycles. An edge detector detects the edge position of a pulse of the sampled digital signal and a counter counts the clock cycles between at least a first edge and a second edge detected by the edge detector. A deviation detector then compares the counted clock cycles with a prestored reference-value in order to provide a deviation value as a measure for the instantaneous quality of the digital signal. The deviation value is then fed to a rework unit that outputs a value that is a measure for the quality of the digital signal.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: March 21, 2006
    Assignee: International Business Machines Corporation
    Inventors: Walter Hirt, Fritz Gfeller
  • Patent number: 7007305
    Abstract: A repeater amplifier boosts weak control signals on a PLC network, with noise discrimination and signal firewall protection. The AC supply voltage is filtered by a high frequency blocking filter to block external noise signals. Operating power for network signaling devices and the repeater amplifier is derived from the clean AC supply voltage. Noise discrimination and signal firewall protection are provided by amplifying and repeating only those receiver pulse signals that (a) have an analog amplitude that exceeds a predetermined analog threshold value, (b) occur during intervals that control data signal modulation is being applied to the filtered AC supply voltage and (c) occur at a frequency within a predetermined frequency band centered on the transmitted power line carrier (PLC) modulation frequency.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: February 28, 2006
    Assignee: Genlyte Thomas Group LLC
    Inventors: Steven R. Carson, Raymond T. Griffin