With Device Responsive To External Physical Condition Patents (Class 331/65)
  • Patent number: 10612992
    Abstract: A system includes a signal generator configured to generate a signal, the signal being a constant frequency signal or the signal ranging in frequency during a time period. The system includes a probe electrically coupled to the signal generator, and the probe is configured to hover across or touch an encapsulated or uncapsulated strain gauge. The probe includes a coil and a stylus. The coil is configured to receive the signal from the signal generator and generate a magnetic field. The stylus is configured to transmit the magnetic field to the strain gauge. The system includes a data acquisition component coupled to the strain gauge. The data acquisition component is configured to receive stimulus data from the strain gauge, resulting from the magnetic field transmitted by the probe. The data acquisition component is configured to determine whether the stimulus data from the strain gauge is above a threshold, and if so, determine that the strain gauge is operable.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: April 7, 2020
    Assignee: Lockheed Martin Corporation
    Inventor: George N. Edwards
  • Patent number: 10575787
    Abstract: A hydration sensor is provided that includes a circulator having a plurality of ports, an amplitude-modulated coherent source connected to a first port of the circulator, a rectifier or other power sensor connected to a second port of the circulator followed by an RF baseband low-noise amplifier, a coupling structure connected to the third port of the circulator, and a demodulator connected to the output of the rectifier. The hydration sensor can include an RF low noise amplifier between the circulator and rectifier, and/or a second amplitude modulator between the circulator and the coupling structure. The coupling structure can be either a guided-wave near-field structure or an interfacial capacitive or inductive element. In the former case, the hydration is determined by measuring the reflectivity of the guided-wave radiation, and in the latter case it is determined by measuring the change of reflectivity (through change of impedance) of the interfacial element.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: March 3, 2020
    Assignee: Wright State University
    Inventors: Elliott R. Brown, Weidong Zhang
  • Patent number: 10575353
    Abstract: A protective connector includes a core assembly structure, mating pins and a mating coupling structure. The core assembly structure has circuitry mounted therein. The mating coupling structure substantially encases the core assembly structure and mates with another connector such that the mating pins of the protective connector are electrically coupled to pins of the other connector. The mating coupling structure is mechanically free-moving with respect to the core assembly structure such that forces applied to the mating coupling structure to mate the protective connector to the other connector are not applied to the circuitry within the core assembly structure.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: February 25, 2020
    Assignee: The Climate Corporation
    Inventors: Christopher Sears Mikelson, Chad Plattner
  • Patent number: 10527461
    Abstract: A device for measuring a measurement variable, wherein a first inductance is replenished with a capacitance to form a parallel resonant circuit and the first inductance is coupled to a measurement inductance.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: January 7, 2020
    Assignee: Continental Teves AG & Co. oHG
    Inventor: Heinrich Acker
  • Patent number: 10444103
    Abstract: In an embodiment, a method for calibrating a pressure sensor device is disclosed. The method involves determining the resonant frequency of a membrane of the pressure sensor device after the pressure sensor device has been attached to a circuit board, calculating a change in the resonant frequency from a resonant frequency stored in memory, calculating strain of the membrane of the pressure sensor device from the change in resonant frequency, and calibrating the pressure sensor device based on a capacitance-to-pressure curve calculated using the strain of the membrane of the pressure sensor device.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: October 15, 2019
    Assignee: ams International AG
    Inventors: Willem Frederik Adrianus Besling, Casper van der Avoort, Remco Henricus Wilhelmus Pijnenburg, Martijn Goossens
  • Patent number: 10212744
    Abstract: A protective connector includes a core assembly structure, mating pins and a mating coupling structure. The core assembly structure has circuitry mounted therein. The mating coupling structure substantially encases the core assembly structure and mates with another connector such that the mating pins of the protective connector are electrically coupled to pins of the other connector. The mating coupling structure is mechanically free-moving with respect to the core assembly structure such that forces applied to the mating coupling structure to mate the protective connector to the other connector are not applied to the circuitry within the core assembly structure.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: February 19, 2019
    Assignee: The Climate Corporation
    Inventors: Christopher Sears Mikelson, Chad Plattner
  • Patent number: 10175074
    Abstract: An electromagnetic flowmeter has a flowtube configured to carry a conductive fluid. The flowtube has wall made of a conductive material. The wall has an inner surface surrounding a fluid flow path for the fluid. A non-conductive liner is positioned to electrically insulate the flowtube wall from the fluid. The flowtube and non-conductive liner define an electrode mounting hole. An electrode extends through the electrode mounting hole. The electrode and the non-conductive liner form a fluidic seal between the electrode mounting hole and the fluid flow path. At least a portion of the electrode is arranged in fluid communication with the flowtube within the electrode mounting hole. A short circuit detector can detect failure of the seal when conductive fluid that has leaked past the seal creates a short circuit as a result of the fluid communication between the flowtube and the electrode mounting hole.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: January 8, 2019
    Assignee: Schneider Electric Systems USA, Inc.
    Inventors: Daniel G. Tower, III, John Yuxiang Xie, James L. Pizzuti, Antoine DeProost
  • Patent number: 10145718
    Abstract: A level gauge with a control and evaluation electronic comprising a signal generator for generating an alternating voltage, a signal detector for detecting a reflected voltage, a resonant measuring probe, and a connecting element, which connects the evaluating electronic electrically to the measuring probe, with the connecting element comprising a first connecting conductor, which connects the signal generator to the measuring probe, and a second connecting conductor which connects the measuring probe to the signal detector.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: December 4, 2018
    Assignee: VEGA GRIESHABER KG
    Inventor: Karl Griessbaum
  • Patent number: 10143388
    Abstract: A method of manufacturing a sensor for in vivo applications includes the steps of providing two wafers of an electrically insulating material. A recess is formed in the first wafer, and a capacitor plate is formed in the recess of the first wafer. A second capacitor plate is formed in a corresponding region of the second wafer, and the two wafers are affixed to one another such that the first and second capacitor plates are arranged in parallel, spaced-apart relation.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: December 4, 2018
    Assignee: St, Jude Medical Luxembourg Holdings II S.A.R.L. (“SJM LUX II”)
    Inventors: Florent Cros, David O'Brien, Michael Fonseca, Matthew Abercrombie, Jin Woo Park, Angad Singh
  • Patent number: 10088442
    Abstract: Disclosed is a flow meter and method for measuring water cut and salinity of a multiphase mixture. The water-cut meter includes a conduit configured to receive the multiphase mixture, and a probe array configured to measure a cross-sectional area of the conduit. The probe array includes a plurality of coaxial probes connected in parallel. Optionally, the probe array is configured to operate at a single high frequency, for example, 1 to 3 GHz, to minimize conductivity loss relative to capacitance. The flow meter further includes a processor configured to transmit a signal to the probe array and to receive a reflected signal from the probe array using a single channel. The processor is further configured to calculate the water cut and the salinity of the multiphase mixture based on a single complex permittivity of the multiphase mixture calculated from the received reflected signal.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: October 2, 2018
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventors: Michael John Black, Mohamed N. Noui-Mehidi
  • Patent number: 10068198
    Abstract: A controller-implemented method for managing inventory of pallets on a pallet rack is provided. The controller-implemented method may include engaging a plurality of exciters to generate a rack frequency in the pallet rack, receiving the rack frequency at a plurality of corresponding harvesters, detecting variations between the rack frequency generated by the exciters and the rack frequency received by the harvesters, and detecting one or more load characteristics of pallets on the pallet rack based on the variations.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: September 4, 2018
    Assignee: Caterpillar Inc.
    Inventor: Kenneth Stonecipher
  • Patent number: 10037392
    Abstract: A computing device is described that is configured to display a graphic visualization for modeling an irrigation system, such as a center pivot irrigation system. In an implementation, the computing device includes a memory and a processor communicatively coupled to the memory. The computing device also includes one or modules stored in memory and executable by the processor. The one or more modules are configured to instruct the processor to receive a command for placing one or more representations of a center pivot irrigation system within a graphical representation of a cultivation area and to receive one or more operational parameters of the center pivot irrigation system. The one or more modules are also configured to instruct the processor to model operation of the center pivot irrigation system based upon the one or more operational parameters.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: July 31, 2018
    Assignee: Valmont Industries, Inc.
    Inventor: Zachary M. Lammers
  • Patent number: 9861524
    Abstract: Devices and methods for the measurement and control of fluid using one or two capacitors are described. The devices use Micro-Electro-Mechanical-Systems (MEMS) and radio-frequency inductive coupling to sense the properties of a fluid in a tube. The single and double capacitor devices may be coupled to shunts implantable in a patient and operable to be interrogated non-invasively. The shunts employing the novel capacitor devices are insensitive to stray signals such as the orientation of a patient's head. The devices are operable to employ a wireless external spectrometer to measure passive subcutaneous components.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: January 9, 2018
    Assignee: New Jersey Institute of Technology
    Inventors: Gordon Albert Thomas, Reginald Conway Farrow, Alokik Kanwal
  • Patent number: 9808567
    Abstract: Pressure measurement system (e.g., for an extracorporeal treatment system), method and pressure pod apparatus including a position sensor for use in repositioning a diaphragm that separates a liquid side cavity from a transducer side cavity (e.g., operatively connected to a pressure transducer); the liquid side cavity being in fluid communication with an inlet and an outlet.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: November 7, 2017
    Assignee: Gambro Lundia AB
    Inventor: John O'Mahony
  • Patent number: 9789697
    Abstract: A fluid sensor has a first electrode, a second electrode, a housing containing the first and second electrodes, such that the electrodes extend from the housing, exposed metal between the first and second electrodes, and a drive signal electrically connected to the second electrode, such that when fluid is present in the reservoir, either the first electrode senses the presence of the fluid, or the drive signal senses presence of the fluid. A fluid sensor has a first electrode, a second electrode, a housing containing the first and second electrodes, a drive signal electrically connected to the second electrode, and sensing circuitry to measure a current from the second electrode to indicate a fluid level.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: October 17, 2017
    Assignee: XEROX CORPORATION
    Inventors: David L. Knierim, Steven Ross Slotto, Blake Terry Weimer
  • Patent number: 9751320
    Abstract: A printhead with a separate address generator for ink level sensors is described. In an example, a printhead includes drop ejectors fluidically coupled to nozzles, at least one nozzle address generator, nozzle decoders coupled to nozzle address generator(s) and the drop ejectors, ink level sensors each having a sensor circuit in a sensor chamber and a purging resistor circuit, a sensor address generator, and sensor decoders coupled to the sensor address generator and the purging resistor circuit in each of the ink level sensors.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: September 5, 2017
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: Ning Ge
  • Patent number: 9746945
    Abstract: Methods, apparatuses, systems, and computer-readable media for integrating sensation functionalities into a mobile device using a haptic sleeve are presented. According to one or more aspects of the disclosure, a computing device may receive, via a haptic sleeve, sensation input captured by one or more haptic components of the haptic sleeve. Subsequently, the computing device may store haptic data corresponding to the received sensation input. For example, in storing such haptic data, the computing device may store information describing one or more electrical signals received via the one or more haptic components of the haptic sleeve during a period of time corresponding to a particular event, and this stored information may reflect various characteristics of the sensation input received by the computing device in connection with the particular event, such as the magnitude(s), position(s), duration, and/or type(s) of sensation(s) captured during the period of time.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: August 29, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Leonid Sheynblat, Vinay Sridhara, Saumitra Mohan Das
  • Patent number: 9479165
    Abstract: The invention relates to an inductive proximity switch having a current-fed resonant circuit comprising at least one resonant circuit transmitting coil and a capacitance. The resonant circuit transmitting coil generates an alternating magnetic field, which is able to induct a mutual induction voltage in at least one receiving coil, and the oscillation state of the resonant circuit can be influenced by a metallic release entering or moving away from the alternating field, having an evaluating circuit for obtaining a switching signal from the change in the oscillation state of the resonant circuit, the change in the complex coupling between the at least two coils, namely transmitting coil and receiving coil, being evaluatable with the aid of an auxiliary voltage signal as a switching signal in the presence or absence of the release.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: October 25, 2016
    Assignee: PEPPERL + FUCHS GmbH
    Inventor: Thomas Kuehn
  • Patent number: 9383843
    Abstract: A system and method for autonomously scanning a sensor panel device is disclosed. A sensor panel processor can be disabled after a first predetermined amount of time has elapsed without the sensor panel device sensing any events. One or more system clocks can also be disabled to conserve power. While the processor and one or more system clocks are disabled, the sensor panel device can periodically autonomously scan the sensor panel for touch activity. If one or more results from the autonomous scans exceed a threshold, the sensor panel device re-enables the processor and one or more clocks to actively scan the sensor panel. If the threshold is not exceeded, the sensor panel device continues to periodically autonomously scan the sensor panel without intervention from the processor. The sensor panel device can periodically perform calibration functions to account for any drift that may be present in the system.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: July 5, 2016
    Assignee: Apple Inc.
    Inventors: Christoph H. Krah, Minh-Dieu Thi Vu, Thomas James Wilson
  • Patent number: 9274075
    Abstract: A method determines a type of an object in a proximity to a resonant structure having a resonant frequency as a metallic object if the object changes a phase of a power signal reflected by the resonant structure at frequencies below and above the resonant frequency. Otherwise, the method determines the type of the object as a non-metallic object.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: March 1, 2016
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Bingnan Wang, Jiang Long, Koon Hoo Teo
  • Patent number: 9190952
    Abstract: A circuit including a tank circuit, a pair of transistors, a bias circuit, and a capacitor. The transistors include (i) drain terminals coupled to the tank circuit, (ii) source terminals coupled to each other, and (iii) gate terminals cross-coupled to the drain terminals via a pair of capacitors. The bias circuit is coupled to the gates of the pair of transistors to i) alternatingly turn on the pair of transistors during a plurality of peaks of an oscillating signal of the tank circuit, and ii) turn off the pair of transistors during a plurality of crossing points of the oscillating signal. The capacitor is coupled to (i) the tank circuit and (ii) the pair of transistors.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: November 17, 2015
    Assignee: Marvell International LTD.
    Inventor: Sehat Sutardja
  • Patent number: 9157768
    Abstract: Inductive position sensing uses inductance multiplication with series connected sensor coils. In one embodiment, a first sensing domain area is established in a first target plane using first and second sensor coils disposed on a longitudinal axis, on opposite sides of the first target plane and connected in series, so that a series-combined inductance is a multiple of a sum of the respective first and second coil inductances. Target position within the first sensing domain area of the first target plane is detected based on the series-combined inductance of the first and second coils, which changes as the target moves within the first sensing domain area of the first target plane. Further sensitivity can be achieved by additional coils, series connected on the same longitudinal axis, each coil pair defining a sensing area on a respective target plane intermediate the coils.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: October 13, 2015
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: George Pieter Reitsma, Evgeny Fomin
  • Patent number: 9151862
    Abstract: A buried object detector comprising: a loop antenna and an RF source, the RF source coupled to the loop antenna and arranged to feed the loop antenna with an RF signal, the detector further comprising a detector circuit coupled to the loop antenna and arranged to detect changes in the quality factor of a resonant circuit formed by the loop antenna, wherein the loop antenna is arranged to magnetically couple with a buried object, thereby reducing the quality factor of the resonant circuit.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: October 6, 2015
    Assignee: Roke Manor Research Limited
    Inventor: Chris Richardson
  • Patent number: 9110118
    Abstract: A proximity sensor includes a relatively simple health monitoring circuit. The proximity sensor includes a variable gain oscillator, a feedback circuit, and a proximity determination circuit. The variable gain oscillator has a gain that varies with the proximity of a target to a sensor coil, generates an oscillating electrical signal having a substantially constant amplitude magnitude, and generates an energy signal representative of the electrical energy needed to sustain oscillations. The feedback circuit supplies feedback to the oscillator, and the proximity determination circuit, based on the energy signal, supplies a proximity signal representative of target proximity to the sensor coil. The health monitor circuit also receives the oscillating electrical signal and supplies a health status signal representative of proximity sensor health.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: August 18, 2015
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventor: John Kenneth Tillotson
  • Patent number: 9088261
    Abstract: Resonant impedance sensing with a resonant sensor (such as LC) is based on generating a controlled negative impedance to maintain steady-state oscillation in response to changes in resonance state caused by interaction with a target. Resonant impedance sensing can include: (a) generating a controlled negative impedance at the sensor; (b) controlling the negative impedance based on a detected resonance state to substantially cancel the sensor resonant impedance, such that the sensor resonance state corresponds to steady-state oscillation, where the negative impedance is controlled by a negative impedance control loop that includes the sensor resonator as a loop filter; and (c) providing sensor response data based on the controlled negative impedance, such that the sensor response data represents a response of the sensor to the target. Thus, the response of the sensor to the target corresponds to the negative impedance required for steady-state oscillation.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: July 21, 2015
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: George P. Reitsma
  • Patent number: 9066463
    Abstract: In some embodiments, a crop feeler system automatically executes a navigational task based on a proximity of a vehicle to an obstacle. The crop feeler system includes a hub attached to the vehicle. Inside the hub are two oscillating circuits each having an oscillating frequency. A member is coupled to the hub. Two inductive elements are positioned within the member so that, when the obstacle comes into contact with the member, at least one of the inductive elements moves closer to at least one of the oscillating circuits and alters the oscillating frequency of that oscillating circuit. A navigation sensor measures the oscillating frequency of the oscillating circuit, identifies a navigational task using the oscillating frequency of the oscillating circuit, and executes the navigational task.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: June 30, 2015
    Assignee: TRIMBLE NAVIGATION LIMITED
    Inventor: Arthur F. Lange
  • Patent number: 8907734
    Abstract: An oscillator system having: an UHF oscillator, such as a SAW oscillator, for producing a signal having a controllable frequency; a passive vibration, suppressor mechanically coupled to the UHF oscillator for suppressing vibrations above a predetermined bandwidth BW1 on the UHF oscillator; and an active vibration suppressor. The active vibration suppressor includes an accelerometer for sensing vibrations within a predetermined bandwidth BW2 on the UHF oscillator; and an HF or VHF oscillator, such as a crystal oscillator, producing a signal having a frequency controlled by the accelerometer. A control loop having a bandwidth changeable with sensed vibration level is fed the oscillator and the UHF oscillator for controlling the frequency of the signal produced by the SAW oscillator in accordance with a difference between the signal produced the HF or VHF oscillator and the signal produced by the UHF oscillator, the control loop having a bandwidth BW3; where BW1<BW3<BW2.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: December 9, 2014
    Assignee: Raytheon Company
    Inventors: Roger L. Clark, Ernest P. Caramanis
  • Publication number: 20140182361
    Abstract: A sensor for detecting analytes, a method of making the sensor, and a method of using the sensor. In one embodiment, the present invention comprises at least one array comprising a plurality of resonators. The resonators can be arranged in a plurality of rows and a plurality of columns, and can be connected in a combined series-parallel configuration. The resonators can be adapted to vibrate independently at about the same resonance frequency and about the same phase. The sensor can also comprise an actuator and a signal detector electrically coupled to the array. The sensor can also further comprise an analyte delivery system and can be functionalized for detection of at least one analyte.
    Type: Application
    Filed: January 25, 2013
    Publication date: July 3, 2014
    Applicant: California Institute of Technology
    Inventors: Igor Bargatin, John Sequoyah Aldridge, Edward Myers, Michael L. Roukes
  • Patent number: 8571816
    Abstract: Gain switching is performed by a DC amplifying circuit. The DC amplifying circuit is provided with individual gain generating circuits and a gain selecting circuit, and saturation preventing circuits are provided in earlier stages than the individual gain generating circuits. The individual gain generating circuit generates a gain G1, the individual gain generating circuit generates a gain G2 (where G2>G1), and the individual gain generating circuit generates a gain G3 (where G3>G2). The gain selecting circuit selects, as a used gain generating circuit, one of the individual gain generating circuits, and sends the output thereof to an A/D converting circuit in a later stage.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: October 29, 2013
    Assignee: Azbil Corporation
    Inventors: Taka Inoue, Ichirou Mitsutake
  • Patent number: 8461934
    Abstract: An IC includes first and second pads. The first pad is configured to receive an external clock. Alternatively, the first and second pads are configured to be coupled to a crystal oscillator and receive a reference clock. Alternatively, the second pad is configured to be grounded. The IC includes an internal oscillator for generating an internal clock, and an oscillator detector coupled to the second pad. The oscillator detector includes a transistor having a gate coupled to the second pad configured to pull a source-drain region to a first state if the second pad receives the reference clock or allow the source-drain region to be pulled to a second state if the second pad is grounded. The IC includes a buffer for transferring the first state to the internal oscillator for keeping the internal oscillator enabled and transferring the second state to the internal oscillator for disabling the internal oscillator.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: June 11, 2013
    Assignee: Marvell International Ltd.
    Inventors: Ovidiu Carnu, Xiaoyue Wang, Shafiq M. Jamal
  • Publication number: 20130127551
    Abstract: A resonator-controlled oscillator arrangement comprises a resonator-controlled oscillator of which the operating frequency is adjustable and a control circuit for setting the operating frequency of the oscillator. The control circuit is operative to set the operating frequency in dependence upon prevailing ambient conditions. The control circuit has a control input for initiating a set-up procedure during which the operating frequency of the oscillator is set to a value remote from any resonance frequency of a coupled mode that would cause an activity dip.
    Type: Application
    Filed: July 29, 2011
    Publication date: May 23, 2013
    Applicant: ADAPTALOG LIMITED
    Inventor: George Hedley Strorm Rokos
  • Patent number: 8427249
    Abstract: A resonator comprising: a frame; a first oscillator configured to oscillate with respect to the frame; a first driver configured to drive the first oscillator at the first oscillator's resonant frequency; a first half of a first relative position switch mounted to the first oscillator; a second oscillator having substantially the same resonant frequency as the first oscillator, wherein the first and second oscillators are designed to respond in substantially the same manner to external perturbations to the frame; a second half of the first relative position switch mounted to the second oscillator; and wherein as the first oscillator oscillates there is relative motion between the first and second oscillators such that the first relative position switch passes through a closed state in each oscillation when the first and second switch halves pass by each other.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: April 23, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Paul D. Swanson, Richard L. Waters
  • Patent number: 8351867
    Abstract: The present invention provides an oscillator and a communication system using the oscillator, in particular, an LC oscillator adapted to lessen phase noise deterioration due to harmonic distortions and increase the amplitude of oscillation, thereby having a favorable low phase noise characteristic. The oscillator comprises at least one voltage to current converter consisting of a transistor and a resonator comprising two LC tanks consisting of a pair of conductive elements and inductive elements. A feedback loop is formed such that an output terminal of the voltage to current converter is connected to the resonator and a current input to the resonator is converted to a voltage which is in turn fed back to an input terminal of the voltage to current converter. Inductive elements constituting the two LC tanks constituting the resonator are mutually inductively couple and a coefficient of the mutual induction is about ?0.6.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: January 8, 2013
    Assignee: Hitachi, Ltd.
    Inventor: Yusuke Wachi
  • Patent number: 8081036
    Abstract: The device has a component providing an outlet signal whose oscillation frequency depends on a physical unit to be measured, and a reference oscillator. A phase comparison component compares the component and the oscillator for control on the component or for mutual control. A synchronization unit permits alternatively blocking and oscillation of the component. A determination unit determines a derivative signal from evolution of the output signal of the component. The device also includes an electrostatic type keyboard having an electrode assembly.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: December 20, 2011
    Assignee: Noalia Gestion
    Inventor: Jean-Noel Lefebvre
  • Patent number: 8026771
    Abstract: A driver device that forms an oscillation loop with a vibrator and causes the vibrator to produce driving vibrations includes a current-voltage converter that converts a current that flows through the vibrator into a voltage, an output circuit that causes the vibrator to produce the driving vibrations based on a signal that is converted into a voltage with respect to a given voltage, and a high-pass filter that is provided in the oscillation loop between the current-voltage converter and the output circuit. The driver device causes the vibrator to produce the driving vibrations while changing a reference potential of the high-pass filter, and then causes the vibrator to produce the driving vibrations while fixing the reference potential.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: September 27, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Kanai, Naoki Yoshida, Eitaro Otsuka
  • Patent number: 8022777
    Abstract: An oscillator assembly including an oscillator seated on a pad of thermally conductive material formed on the surface of a printed circuit board and covered by a lid defining an oven for the oscillator. In one embodiment, a plurality of heaters are located on different sides of the oscillator and at least partially seated on the pad for evenly transferring heat to the pad and the oscillator. In one embodiment, the oscillator is a temperature compensated crystal oscillator and an integrated amplifier controller circuit on the printed circuit board integrates at least one operational amplifier for controlling the heater(s) and one or more transistors for providing heat to the oven. A canopy seated on the pad and covering the oscillator can be used for transferring heat more evenly to the oscillator. A cavity in the bottom of the printed circuit board defines an insulative air pocket.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: September 20, 2011
    Assignee: CTS Corporation
    Inventors: James L. Stolpman, Jeffrey A. McCracken
  • Publication number: 20110121907
    Abstract: A driver device that forms an oscillation loop with a vibrator and causes the vibrator to produce driving vibrations includes a current-voltage converter that converts a current that flows through the vibrator into a voltage, an output circuit that causes the vibrator to produce the driving vibrations based on a signal that is converted into a voltage with respect to a given voltage, and a high-pass filter that is provided in the oscillation loop between the current-voltage converter and the output circuit. The driver device causes the vibrator to produce the driving vibrations while changing a reference potential of the high-pass filter, and then causes the vibrator to produce the driving vibrations while fixing the reference potential.
    Type: Application
    Filed: November 26, 2007
    Publication date: May 26, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masahiro Kanai, Naoki Yoshida, Eitaro Otsuka
  • Patent number: 7942833
    Abstract: A device for inducing a user's motion in a rhythm responsive to a motion rhythm after the user's motion rhythm changes suddenly. The walking assist device generates a first oscillator which attains mutual entrainment with a user's hip joint angular velocity to reflect a natural angular velocity. On the other hand, a new natural angular velocity is set based on the phase difference between the hip joint angular velocity and the first oscillator. A second oscillator which oscillates in rhythm reflecting the natural angular velocity is generated. An inducing oscillator is generated based on the second oscillator, and a torque responsive to the inducing oscillator acts on the user's body. If the magnitude of a periodic variation in the hip joint angular velocity exceeds a threshold value, a second oscillator which oscillates in rhythm reflecting the angular velocity of the first oscillator instead of the natural angular velocity is generated.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: May 17, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventor: Ken Yasuhara
  • Patent number: 7924104
    Abstract: A method for compensating a clock bias in a Global Navigation Satellite System (GNSS) receiver includes deriving at least one clock drift value comprising a first clock drift value corresponding to a first time point, and calculating the clock bias according to the at least one clock drift value and at least one interval within the time period between the first time point and a specific time point after the first time point. An apparatus for compensating a clock bias in a GNSS receiver is also provided.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: April 12, 2011
    Assignee: Mediatek Inc.
    Inventors: Kung-Shuan Huang, Yu-Chi Yeh
  • Patent number: 7924105
    Abstract: The present invention relates to a method for the detection of a predamping state of an inductive sensor. The sensor has at least one oscillator with a resonant circuit and an oscillation amplifier. According to the method the oscillatory response of the oscillator is analyzed with an operating amplification or gain. According to the invention the method is further developed in that the oscillatory behavior of the oscillator is additionally analyzed for an analysis amplification or gain, which is chosen lower than the operating amplification. The analysis amplification is also chosen in such a way that the oscillatory response of the oscillator reacts sensitively to objects or articles located in close proximity to the sensor. The invention also relates to an inductive sensor with predamping detection.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: April 12, 2011
    Assignee: Pepperl + Fuchs GmbH
    Inventor: Thomas Kuehn
  • Patent number: 7924103
    Abstract: The present invention relates to an inductive proximity switch with an oscillator having a resonant circuit and an amplifier and with an evaluating and control device for evaluating an impedance of the resonant circuit and for outputting a switching signal. According to the invention, the proximity switch is characterized in that a frequency measuring device is provided for measuring the oscillation frequency of the oscillator and for eliminating ambiguities of the evaluation result of the evaluating and control device. The invention also relates to a method for operating an inductive proximity switch.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: April 12, 2011
    Assignee: Pepperl + Fuchs GmbH
    Inventor: Thomas Kuehn
  • Patent number: 7915965
    Abstract: This invention relates to an oscillator having reduced sensitivity to acceleration. The oscillator includes a plurality of asymmetrically mounted resonator portions each having an active resonance region. The asymmetric mounting of the resonator portions means that each resonator portion has an axis passing through its active resonance region along which the acceleration sensitivity vector is dominant, i.e. the sensitivity to acceleration along the direction defined by one axis is much greater than the sensitivity to acceleration in other directions. The resonators are mounted in an oscillator such that their dominant axes are directed in different directions, e.g. an anti-parallel arrangement, which means that the dominant acceleration sensitivity vectors can cancel each other out.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: March 29, 2011
    Assignee: Rakon UK Limited
    Inventors: Nigel David Hardy, George Hedley Storm Rokos
  • Patent number: 7899633
    Abstract: An object of the present invention is to provide a sensing instrument capable to detect a substance existing in a very small quantity, such as environmental pollutants, instantly with a high degree of precision. As a specific means for solving the problem, a frequency signal from a crystal oscillator is sampled using a frequency signal from a reference clock generating part, the sampling value is outputted in a digital signal, quadrature detection is conducted with the digital signal for a frequency signal corresponding to the output signal, the rotational vector rotating at a frequency corresponding to the difference between the frequency of the frequency signal and the frequency of a sinusoidal wave used for the quadrature detection is taken out, and the variation of the frequency is detected by detecting the velocity of the rotational vector based on the respective sampling values.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: March 1, 2011
    Assignees: Nihon Dempa Kogyo Co., Ltd., DSP Technology Associates, Inc.
    Inventors: Nobuo Tsukamoto, Kazuo Akaike, Tsukasa Kobata
  • Patent number: 7893776
    Abstract: A speed monitor circuit integrated in an integrated circuit (IC) determines the speed of the IC. The speed monitor circuit includes an oscillator that generates an oscillator signal. A speed determining circuit generates a first count based on transitions of the oscillator signal. A match signal corresponds to the speed of the oscillator based on the first count and a reference count.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: February 22, 2011
    Assignee: Marvell Israel (M.I.S.L) Ltd.
    Inventors: Reuven Ecker, David Moshe
  • Patent number: 7880552
    Abstract: A system capable of controlling an autonomous walking assist rhythm, while following changes in a walking rhythm of a walker at the same time. A control system 100 in accordance with the present invention generates a first oscillator x that tugs and is tugged by a walking oscillator (hip joint angular velocity) ?H? such that an intrinsic angular velocity is reflected. Then, a new intrinsic angular velocity ?m is determined on the basis of the difference between a first phase difference ?HM between the first oscillator x and the walking oscillator ?H? and a desired phase difference ?d. Furthermore, a second oscillator y is generated that tugs and is tugged by the walking oscillator ?H? such that the intrinsic angular velocity ?m is reflected, and has a second phase difference ?hm, which is closer to the desired phase difference ?d than the first phase difference ?HM is, with respect to the walking oscillator ?H?.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: February 1, 2011
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Ken Yasuhara, Yoshihiro Miyake
  • Patent number: 7849744
    Abstract: An oscillation driver circuit includes a gain control amplifier which causes a vibrator to produce driving vibrations by controlling an oscillation amplitude in an oscillation loop, and a comparator which generates a synchronous detection reference signal based on a signal in the oscillation loop. The oscillation driver circuit sets a gain in a first oscillation loop including the vibrator and the comparator to be larger than unity using an output from the comparator, and then causes the vibrator to produce the driving vibrations by controlling an oscillation amplitude in a second oscillation loop including the vibrator and the gain control amplifier in at least one of an oscillation startup state and a sleep mode.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: December 14, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Kanai, Eitaro Otsuka, Naoki Yoshida
  • Patent number: 7843277
    Abstract: A system that generates a haptic effect generates a drive cycle signal that includes a drive period and a monitoring period. The drive period includes a plurality of drive pulses that are based on the haptic effect. The system applies the drive pulses to a resonant actuator during the drive period and receives a signal from the resonant actuator that corresponds to the position of a mass in the actuator during the monitoring period.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: November 30, 2010
    Assignee: Immersion Corporation
    Inventors: Pedro Gregorio, Danny A. Grant, Patrice Favreau, Eric Meunier
  • Publication number: 20100231308
    Abstract: A surface acoustic wave (“SAW”) sensor includes; a first signal generator which generates a first signal having a predetermined frequency bandwidth using a pseudo random sequence, a second signal generator which generates a second signal with a predetermined frequency, a signal blender which blends the first signal with the second signal to generate a blended signal having the predetermined frequency bandwidth with the predetermined frequency as a center frequency, a wave generator which generates a surface acoustic wave using the blended signal, which converts the surface acoustic wave into a third signal after the surface acoustic wave travels a predetermined distance, and which outputs the third signal, and a signal detector which detects a change in the third signal from the wave generator to sense a substance bound to the wave generator.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 16, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hun Joo LEE, Soo Suk LEE, Soo Hyung CHOI
  • Patent number: 7737796
    Abstract: A lead wire led-out type crystal oscillator of constant temperature type for high stability is disclosed, which includes a heat supply body that supplies heat to a crystal resonator from which a plurality of lead wires are led out, to maintain the temperature constant. The heat supply body includes a heat conducting plate which has through-holes for the lead wires and is mounted on the circuit board, and which faces, and is directly thermally joined to, the crystal resonator and a chip resistor for heating which is mounted on the circuit board adjacent to the heat conducting plate, and is thermally joined to the heat conducting plate.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: June 15, 2010
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventors: Manabu Ito, Minoru Fukuda, Tetuo Kudo, Takeshi Uchida
  • Patent number: RE46499
    Abstract: A self-powered switching device using a prestressed flextensional electroactive member generates a signal for activation of a latching relay. The electroactive member has a piezoelectric element with a convex and a concave face that may be compressed to generate an electrical pulse. The flextensional electroactive member and associated signal generation circuitry can be hardwired directly to the latching relay or may be coupled to a transmitter for sending an RF signal to a receiver which actuates the latching relay.
    Type: Grant
    Filed: March 8, 2009
    Date of Patent: August 1, 2017
    Assignee: Face International Corporation
    Inventors: Bradbury R. Face, Clark D. Boyd, Glenn F. Rogers, Jr., Gregory P. Thomas