Shock Excited Resonant Circuit Patents (Class 331/165)
  • Patent number: 9466977
    Abstract: The invention provides a power surge protection apparatus which includes at least one large capacitor used within a surge protection circuit associated with an electrical load to be protected. This large capacitor or capacitors are arranged to divert and store at least a portion of the energy present in a transient voltage surge to prevent or mitigate damage to the protected electrical load. In preferred embodiments the invention uses large capacitors in the form of electrical double layer capacitors.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: October 11, 2016
    Assignee: WAIKATOLINK LIMITED
    Inventors: Alythwela Domingo Vithanaye Nihal Kularatna, Lewis Hennedige Jayathu Dimuthu Kumara Fernando
  • 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: 8031021
    Abstract: Provided are an oscillatory circuit based on a metal-insulator transition (MIT) device that can generate a simple and very high oscillating frequency using the MIT device, and a method of driving the oscillatory circuit. The oscillatory circuit includes the MIT device that comprises an MIT thin film and an electrode thin film connected to the MIT thin film and in which an abrupt MIT is generated due to an MIT generating voltage, a resistor that is serially connected to the MIT device, an electric al power source limiting the maximum amount of an applied current and applying a direct current constant voltage to the MIT device, and a light source irradiating electromagnetic waves on the MIT device, wherein the oscillating properties are generated by irradiating the electromagnetic waves using the light source.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: October 4, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yong-Wook Lee, Bongjun Kim, Sungyoul Choi, Jungwook Lim, Sun-Jin Yun, Byung-Gyu Chae, Hyun-Tak Kim, Gyungock Kim
  • Patent number: 8031022
    Abstract: Provided are an MIT device-based oscillation circuit including a power source, an MIT device and a variable resistor, in which a generation of an oscillation and an oscillation frequency are determined according to a voltage applied from the power source and a resistance of the variable resistor, and a method of adjusting the oscillation frequency of the oscillation circuit. The MIT device includes an MIT thin film and an electrode thin film connected to the MIT thin film, and generates a discontinuous MIT at an MIT generation voltage, the variable resistor is connected in series to the MIT device, and the power source applies a voltage or an electric current to the MIT device. The generation of an oscillation and an oscillation frequency are determined according to the voltage applied from the power source and the resistance of the variable resistor.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: October 4, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yong-Wook Lee, Bong-Jun Kim, Hyun-Tak Kim, Sung-Youl Choi, Byung-Gyu Chae, Jung-Wook Lim, Sun-Jin Yun
  • Patent number: 7944217
    Abstract: The present invention offers an object proximity detector and object position detector. The variation of frequency of an oscillator is used to detect the proximity of an object to a sensor plate. The dependence of the sensitivity of the detector on the area of the sensor plate is reduced by conducting the sensor plate to two capacitors in series. The conducting wire of the sensor plate can be flexible without causing error detection. In the sensor element of the sensor oscillator, a resistor is connected at one terminal of the sensor plate to form a high pass filter. A resistor and a capacitor are added to the sensor oscillator to form a low pass filter. The high pass filter is used to reduce the low frequency electromagnetic interference. The low pass filter is used to reduce the high frequency electromagnetic interference.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: May 17, 2011
    Assignee: Holylite Microelectronics Corp.
    Inventor: Shyuh Der Lin
  • Patent number: 7872539
    Abstract: A power source, a primary inductor, a load capacitance, and one or more tuned branch resonators and switching devices are coupled to generate pulses which represent a superposition of sinusoidal waveforms. The primary inductor is connected between the power source and the load. At the start of each cycle the load is coupled to ground and each tuned-branch resonators is reinitialized to re-energize the circuits and to stabilize the waveform when the frequencies of the sinusoidal waveforms are non-periodic.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: January 18, 2011
    Inventor: William C. Athas
  • Patent number: 7782149
    Abstract: A power source, a primary inductor, a load capacitance, and one or more tuned branch resonators and switching devices are coupled to generate pulses which represent a superposition of sinusoidal waveforms. The primary inductor is connected between the power source and the load. At the start of each cycle the load is coupled to ground and each tuned-branch resonators is reinitialized to re-energize the circuits and to stabilize the waveform when the frequencies of the sinusoidal waveforms are non-periodic.
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: August 24, 2010
    Inventor: William C. Athas
  • Patent number: 7479838
    Abstract: A power source, a primary inductor, a load capacitance, and one or more tuned branch resonators and switching devices are coupled to generate pulses which represent a superposition of sinusoidal waveforms. The primary inductor is connected between the power source and the load. At the start of each cycle the load is coupled to ground and each tuned-branch resonators is reinitialized to re-energize the circuits and to stabilize the waveform when the frequencies of the sinusoidal waveforms are non-periodic.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: January 20, 2009
    Inventor: William C. Athas
  • Patent number: 6803859
    Abstract: An oscillator circuit for use with a wire-loop inductive sensor and method for use. The oscillator circuit highly attenuates common-mode noise detected by the wire-loop and differential noise from both ambient and crosstalk sources are filtered by active isolation.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: October 12, 2004
    Assignee: Inductive Signature Technologies, Inc.
    Inventors: Stephen R. Hilliard, Geoffrey W. Hilliard
  • Patent number: 6774735
    Abstract: A clock oscillator circuit that includes an inverting amplifier and a resonator configured to generate an oscillating signal. The clock oscillator includes a bias circuit having a relatively constant current source configured to create a bias voltage to bias the amplifier in an operating state that can sustain the oscillating signal. The inverting amplifier and the bias circuit are configured to operate in a low power state.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: August 10, 2004
    Assignee: Intel Corporation
    Inventors: Chinnugounder Senthilkumar, Tea Lee, Robert Fulton, Andrew M. Volk
  • Patent number: 6762561
    Abstract: An apparatus having a radio frequency resonator, which has a coil, a capacitor means and at least one switch means being associated with another capacitor means, a resistor means and a high voltage supply means, one end of the switch means being connected to a junction of the coil and the capacitor means where a radio frequency voltage is provided, another end of the switch means being connected to ground with said another capacitor means and to the high voltage power supply means with the resistor means.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: July 13, 2004
    Assignee: Shimadzu Research Laboratory (Europe) Ltd.
    Inventor: Eizo Kawato
  • Patent number: 6337602
    Abstract: An oscillator circuit for use with a wire-loop inductive sensor and method for use. The oscillator circuit includes two balanced capacitors coupled to the wire-loop sensor, and an excitation circuit connectable with the capacitors at a selected polarity. Wherein, when the excitation circuit is connected to the capacitors, one of the capacitors is charged while the other capacitor is discharged, and both of the capacitors are discharged when the excitation circuit is disconnected to produce a pair of decaying oscillations having a caduceus-shaped output. The oscillator circuit highly attenuates common-mode noise detected by the wire-loop and differential noise from both ambient and crosstalk sources is filtered by active isolation.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: January 8, 2002
    Assignee: Inductive Signature Technologies, Inc.
    Inventors: Steven R. Hilliard, Geoffrey W. Hilliard
  • Patent number: 6285063
    Abstract: The resonant circuit has at least one resonant body of a semiconductor material anchored on the surface of a semiconductor substrate, at least one first electrode being arranged at said semiconductor material, and at least one second electrode. The first and second electrode are arranged lying opposite one another. When an AC-superimposed DC voltage is applied between the first and the second electrode, the resonant body is excited to mechanical oscillation by the DC voltage. In particular, the resonant circuit can be monoically integrated in electronic circuits.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: September 4, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventors: Armin Splett, Dieter Emmer
  • Patent number: 5861768
    Abstract: A resonance circuit includes a capacitor, a coil element and a primary coil of a transformer. A connection between the resonance circuit and a vehicle-mounted battery is connected and disconnected by a switching transistor at a predetermined duty cycle. Output voltage of a secondary coil of the transformer is supplied to an exciting winding of a resolver.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: January 19, 1999
    Assignee: Denso Corporation
    Inventors: Hiroshi Fujita, Kazuyoshi Obayashi
  • Patent number: 5319665
    Abstract: A high power electromagnetic pulse driver for generating sub-microsecond rise time pulses having energy contents greater than 1 joule includes an electromagnetic pulse compressor and an electromagnetic shock line for compressing the leading edges of those pulses. The shock line may use non-linear materials whose permeability or permittivity vary greatly with varying field strength. One material whose permeability varies by a useful amount is metglass, an amorphous alloy of silicon and iron. The high power electromagnetic pulse driver may drive gas discharge lasers.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: June 7, 1994
    Assignee: Science Research Laboratory
    Inventor: Daniel L. Birx
  • Patent number: 5187449
    Abstract: A structure for guiding millimeter wave radiation employs a resonant coplanar transmission line on a transparent substrate. A very short, picosecond, pulse is generated on the transmission line. By having the upper half plane air, the pulse will radiate into the substrate and be guided as millimeter wave from a distributed source and formed as a point source of radiation.
    Type: Grant
    Filed: February 6, 1992
    Date of Patent: February 16, 1993
    Assignee: IBM Corporation
    Inventor: Paul G. May
  • Patent number: 4980898
    Abstract: A self-oscillating burst mode transmitter transmits an integral number of cycles of a carrier signal in each transmission burst. Each burst commences at a peak value of the carrier signal and terminates at a peak value. The transmitter includes an L-C tank circuit comprising a transmitting coil (L1) connected to a capacitor (C4). The L-C tank circuit is selectively energized through a switching network (Q1, Q2, U1, U2) connected to a power source, causing the tank circuit to resonate at a prescribed frequency (f.sub.0). Selective energization of the tank circuit is achieved by the switching network as controlled by a peak voltage detection circuit (32, 34). The peak detection circuit senses when a peak voltage is present in the oscillatory waveform appearing across the coil of the resonating tank circuit. Power is switched off to the tank circuit at the conclusion of each transmission burst only when the oscillatory voltage waveform, as sensed by the peak detection circuit, is at a peak.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: December 25, 1990
    Assignee: Siemens-Pacesetter, Inc.
    Inventor: Sergiu Silvian
  • Patent number: 4837525
    Abstract: A transient waveform generator capable of generating waveforms having operator specifiable characteristics, including amplitude, rise time, and phase inversion.
    Type: Grant
    Filed: March 15, 1988
    Date of Patent: June 6, 1989
    Assignee: McDonnell Douglas Corporation
    Inventor: Tapas Mukutmoni
  • Patent number: 4833427
    Abstract: A signal source for generating a well-controlled, predictable oscillating output signal within a short, predetermined and constant start-up time is disclosed. The invention includes a switchable current source for selectively providing an electrical signal to a tank circuit which, in response, provides an oscillating output signal. A control circuit, comprising a comparator is connected to the tank circuit for providing a control signal to the switchable current source which causes the current source to switch in response to the output signal. Particular embodiments of the invention include means for controlling the amplitude of the oscillating output signal, means for controlling the transconductance of the current source, and means for starting the signal source.
    Type: Grant
    Filed: October 7, 1987
    Date of Patent: May 23, 1989
    Assignee: Hughes Aircraft Company
    Inventors: Oskar N. Leuthold, James H. Mulligan, Jr.
  • Patent number: 4446427
    Abstract: A detection type device that includes an arrangement for detecting the energy absorbed by a resistive effect element in proximity to the inductor of a resonant circuit. The resonant circuit uses a direct current source to alternatively charge it and then let it ring through a switch connected between the direct current source and the resonant circuit. Two different parameters of the same oscillating signal generated by the resonant circuit are detected and compared. The difference is the result of a ratio of these parameters that accurately reflects the energy absorbed by the resistive effect element. This difference is used for measurement and control purposes.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: May 1, 1984
    Inventor: Rodger T. Lovrenich
  • Patent number: 4348649
    Abstract: A self-pulsing microwave generator with a quarter-wave resonator separated y an electron transit space from a field emission cathode is provided. The quarter-wave resonator acts as an anode and a DC voltage is supplied by a discharge capacitor and a DC current source. The application of DC voltage to the resonator causes the resonator to resonate at a selected frequency dependent upon the size and characteristic of the resonator. The discharge capacitor is discharged by the resonator-cathode combination until the voltage drops below the field emission threshold voltage of the cathode at which time the pulse terminates. The resonator is in the shape of a cone to decrease the interelectrode capacitance.
    Type: Grant
    Filed: August 8, 1980
    Date of Patent: September 7, 1982
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Dieter R. Lohrmann
  • Patent number: 4329627
    Abstract: A circuit for energizing a gaseous discharge lamp at high frequency utilizing a thyristor, preferably an SCR. The energizing circuit for the lamp includes a resonant or tank circuit operating at an appropriate high frequency, preferably above the acoustic resonant frequencies of the lamp, and which also commutates an SCR. The cathode/anode of the SCR is connected to a voltage adjusting network to provide an initiating pulse through the SCR to start oscillations in the resonant or tank circuit when the SCR is gated on and which reduces the applied supply potential to the SCR during its conduction period to ensure non-conductive latching of the SCR when the gate thereto is removed by lengthening the natural commutation interval of the SCR. This permits the SCR to be used as a switch at the high frequencies involved, normally about 60 kHz.
    Type: Grant
    Filed: May 8, 1980
    Date of Patent: May 11, 1982
    Assignee: Esquire, Inc.
    Inventor: Kenneth P. Holmes
  • Patent number: 4257010
    Abstract: A method and apparatus for delivering energy to an oscillatory system in a signal transmitter to maintain the system in a state of oscillation. A component of the oscillatory system that affects the oscillation frequency is influenced by the magnitude of a measured condition which is to be transmitted by the signal transmitter. The oscillatory state of the system is sensed through a signal path, and energy is delivered to the system through substantially the same signal path, said energy being delivered in the form of pulses at time intervals longer than a whole period of oscillation of the system to maintain the system in a state of oscillation.
    Type: Grant
    Filed: January 19, 1977
    Date of Patent: March 17, 1981
    Assignee: Rederiaktiebolaget Nordstjernan
    Inventors: Sven A. Bergman, Per J. Ohlsson, Karl-Gustav E. Nordqvist
  • Patent number: 4227195
    Abstract: 1. A radar signal code generator comprising:a. first oscillator means comprising an output terminal for producing, at id terminal, a continuous signusoidal wave having a continuously varying frequency; andb. pulse generator means operatively connected to said first oscillator means output terminal for producing a plurality of pulses, each of which consists of a constant frequency carrier wave, the initiation of each of said pulses occurring at a predetermined time interval after a respective cycle of said sinusoidal wave from said first oscillator means reaches a selected phase value.
    Type: Grant
    Filed: September 19, 1963
    Date of Patent: October 7, 1980
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: James Salerno, Fabian T. Liss, Frank Weiss
  • Patent number: 4059812
    Abstract: A circuit receiving a degraded synchronous pulse signal which has missing pulses and phase-shifted pulses, and producing an output signal similar to and at a constant phase angle with the input signal, in which the missing pulses have been replaced and the phase-shifted pulses shifted to the correct relative position. Provision is made for adjusting output signal frequency to long term drift in input signal frequency.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: November 22, 1977
    Assignee: Control Data Corporation
    Inventor: Samuel Anderson Procter