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Resonance Frequency patents



      
           
This page is updated frequently with new Resonance Frequency-related patent applications. Subscribe to the Resonance Frequency RSS feed to automatically get the update: related Resonance RSS feeds. RSS updates for this page: Resonance Frequency RSS RSS


Wireless power transfer device and wireless charging system having same

Lg Electronics

Wireless power transfer device and wireless charging system having same

Multi-frequency antenna

Multi-frequency antenna

Multi-frequency antenna

Apparatus for generating mechanical oscillations and a method for determining the resonance frequency of such apparatus

Date/App# patent app List of recent Resonance Frequency-related patents
05/21/15
20150142358
 Rapid interrogation  elastic wave resonant devices patent thumbnailRapid interrogation elastic wave resonant devices
A method for interrogating an elastic wave device includes probing the response of a piezoelectric resonant device at a single frequency alternately on either side of a previously determined first resonance frequency, to characterize this resonance frequency characteristic of the measured physical quantity, by correlating this single measurement with a previously performed measurement.. .
Senseor
05/21/15
20150137746
 Wireless power transfer device and wireless charging system having same patent thumbnailWireless power transfer device and wireless charging system having same
The present specification provides a wireless power transfer device formed to transmit power to a wireless power reception device, and a power transfer unit in the wireless power transfer device comprises: a first coil formed to generate a magnetic field so as to transmit power in an induction scheme; and a second coil wound around the first coil and formed to generate a magnetic field vibrating at a resonance frequency so as to transmit power in a resonance scheme.. .
Lg Electronics Inc.
05/14/15
20150130676
 Multi-frequency antenna patent thumbnailMulti-frequency antenna
A multi-frequency antenna includes a ground layer, at least one antenna unit and at least one antenna network. The antenna unit has its one end electrically connected to the ground layer and its other end electrically connected to the antenna network for generating at least one first resonance frequencies.
05/14/15
20150130324
 Apparatus for generating mechanical oscillations and a  determining the resonance frequency of such apparatus patent thumbnailApparatus for generating mechanical oscillations and a determining the resonance frequency of such apparatus
A device for generating mechanical oscillations is provided. The device has a first mass, a second mass, and a piezoelectric excitation system mechanically coupling the first mass and the second mass to one another, with the piezoelectric excitation system having a stiffness.
05/07/15
20150126858
 Fiber scanning optical probe and medical imaging apparatus including the same patent thumbnailFiber scanning optical probe and medical imaging apparatus including the same
Fiber scanning optical probes and medical imaging apparatuses including the same are provided. The fiber scanning optical probe includes an optical fiber; an actuator attached onto the optical fiber and configured to drive the optical fiber at a driving resonance frequency; a mass provided at a side of the optical fiber and configured to control the driving resonance frequency; and a frequency separator provided on a portion of the optical fiber between the actuator and the mass, the frequency separator being configured to separate the driving resonance frequency into separate resonance frequencies..
Samsung Electronics Co., Ltd.
05/07/15
20150123853
 Wireless transceiver device and antenna module thereof patent thumbnailWireless transceiver device and antenna module thereof
A wireless transceiver device and an antenna module thereof, the antenna module has the current path of a first resonance frequency band and the current path of a second resonance frequency band. The first resonance frequency band partially overlaps the second resonance frequency band.
Lynwave Technology Ltd.
05/07/15
20150123488
 Power feeding device and contactless power feeding system provided with power feeding device patent thumbnailPower feeding device and contactless power feeding system provided with power feeding device
A power feeding device utilizing an electromagnetic resonance coupling method and a contactless power feeding system can be provided. A coupling coefficient of electromagnetic induction coupling in the power feeding device and/or the inside of a power receiving device is optimized to improve electric power transmission efficiency of a resonance frequency regardless of positions of the power feeding device and the power receiving device.
Semiconductor Energy Laboratory Co., Ltd.
04/30/15
20150116446
 Optical scanning apparatus, image forming apparatus including the optical scanning apparatus, and  adjusting resonance frequency at oscillating mirror unit in the optical scanning apparatus patent thumbnailOptical scanning apparatus, image forming apparatus including the optical scanning apparatus, and adjusting resonance frequency at oscillating mirror unit in the optical scanning apparatus
A groove in which a curable resin is filled, is formed on the opposite side face of a face for reflecting light of an oscillating mirror unit. The groove extends so as to cross the swing axis of the oscillating mirror unit, seen from the opposite side of the reflection face of the oscillating mirror unit..
Kyocera Document Solutions Inc.
04/30/15
20150116179
 Chip antenna and communication circuit substrate for transmission and reception patent thumbnailChip antenna and communication circuit substrate for transmission and reception
A first radiating electrode of a split ring resonator type is formed on a side face of a substrate of a rectangular cuboid antenna device so as to be at a right angle to a ground electrode surface, a second radiating electrode is provided on a top surface of the substrate, the first radiating electrode and the second radiating electrode are capacitively coupled, and the resonance frequency of the first radiating electrode and second radiating electrode are configured to be approximately in symmetry with the central frequency of the used frequency.. .
Taiyo Yuden Co., Ltd.
04/30/15
20150114114
 Angular velocity sensor, electronic apparatus, and moving object patent thumbnailAngular velocity sensor, electronic apparatus, and moving object
An angular velocity sensor includes fixing units, a base portion, beam portions that support the base portion with respect to the fixing units, driving vibrating arms connected to the base portion, and detection vibrating arms connected to the base portion. When a width of a detection frequency band is set to f1 [hz], a resonance frequency in a rotational vibration mode in which the base portion rotates and vibrates around a detection axis with respect to the fixing units in association with the deformation of the beam portions is set to f2 [hz], and a detuning frequency is set to f3 [hz], the relation of f1<f2<f3 is satisfied..
Seiko Epson Corporation
04/30/15
20150114113

Angular velocity sensor, electronic apparatus, and moving object


In an angular velocity sensor, when a width of a detection frequency band is set to f1 [hz], a resonance frequency in a first rotational vibration mode in which a base portion rotates and vibrates around a detection axis with respect to fixing units in association with the deformation of beam portions is set to f2 [hz], a detuning frequency is set to f3 [hz], and a resonance frequency in a second rotational vibration mode, having a phase opposite to that of the first rotational vibration mode, in which the base portion rotates and vibrates around the detection axis with respect to the fixing units in association with the deformation of the beam portions is set to f4, a relation of f1<f2<f3<f4 or a relation of f1<f2<f4<f3 is satisfied.. .
Seiko Epson Corporation
04/23/15
20150110517

Sound absorber and image forming apparatus incorporating same


A sound absorber includes a duct member constituting a resonance pathway, the duct member including a pathway portion communicating ends of the duct member; a base member including a concave portion; and a cover member including a neck in which to insert the duct member. The cover member covers the concave portion of the base member, and the cover member combined with the base member forms a resonance space having a volume v the resonance pathway has dimensions of a length lh and a cross-sectional area sh and communicates the resonance space and an exterior of the sound absorber.
Ricoh Company, Ltd.
04/23/15
20150109004

Non-invasive measurement of dielectric properties of a substance


The invention pertains to an apparatus and a method for determining a dielectric property of a first substance in a composition in a non-invasive manner. The composition includes at least the first substance to be measured and a second substance.
Parelectrics Ug (haftungsbeschränkt)
04/23/15
20150108848

Antenna resonance frequency control driver


An antenna control circuit including: an h-bridge circuit including three half-bridge circuits; and a controller configured to control the h-bridge circuit; wherein a first half-bridge circuit and a second half-bridge circuit of the three half-bridge circuits are configured to electrically connect across a resonant antenna with a first resonant frequency and a second resonant frequency; wherein a third half-bridge circuit is configured to electrically connect to a first capacitance connected to the resonant antenna, wherein the controller is configured to control the third half-bridge circuit to switch the connection of the first capacitance to the resonant antenna to a first position that changes the resonant frequency of the resonant antenna to the first resonant frequency.. .
Nxp B.v.
04/16/15
20150101421

Dynamometer system


Provided is a dynamometer system capable of stable speed control and position control even in instances of large load inertia. A speed-control device (6c) in a dynamometer system is provided with: a speed-control-circuit unit (61a) for calculating a torque-current-command value (t2) on the basis of an angular-velocity-command value (ωref) and the angular velocity (ωm) of the dynamometer; a disturbance-observer-compensation unit (63c) for correcting the torque-current-command value by subtracting a disturbance observer (tobs) from the torque-current-command value (t2); and a shaft-torque-detection-compensation unit (62a) for correcting the torque-current-command value by adding a shaft-torque-detection-compensation amount (tsh_k), which is obtained by multiplying a filter transfer function (gbpf) and a control gain (k1) by a shaft-torque-detection value (tsh), to a torque-current-command value (t1).
Meidensha Corporation
04/09/15
20150099471

Receiver and transmitter of coping with interference in super-regenerative communication system, and using the receiver and the transmitter


A receiver and a transmitter that copes with interference in a super-regenerative communication system, and a method of using the receiver and the transmitter, are provided. A super-regenerative receiver includes a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter.
Samsung Electronics Co., Ltd.
04/09/15
20150098855

Method of surface hardening sintered bodies by using vibrations


The present invention relates to a method of surface hardening a plurality of sintered bodies having a hard phase and a binder phase. The method includes the steps of placing the bodies in a container, and forming a system including the container and the bodies therein, and causing the bodies to move and collide with each other and with inside walls of the container.
Sandvik Intellectual Property Ab
04/09/15
20150096362

Extraction of tire characteristics combining direct tpms and tire resonance analysis


Embodiments relate to tire characterization systems and methods for combining direct tire pressure monitoring systems (tpms) and tire resonance analysis in indirect tire pressure monitoring systems (tpms) for the extraction of tire characteristics to characterize other tire parameters. In embodiments, itpms and methods that utilize anti-lock braking system (abs) sensed signals coupled to an electronic control unit (ecu) that may comprise circuitry and/or controllers to process the sensed signals using a resonance frequency analysis (rfa) technique can be combined with direct tire pressure sensor measurements from direct tpms systems.
Infineon Technologies Ag
04/02/15
20150094786

Autonomous intracorporeal capsule with frequency conversion energy harvesting


The energy harvester module of the capsule comprises: a primary oscillating structure subjected to an external low-frequency stress; a secondary oscillating structure comprising an elastic element and able to vibrate in high-frequency resonance; and an electrostatic structure with a first electrode coupled to the primary structure and a second electrode coupled to the secondary structure. The electrodes exert a mutual attraction between them driving the secondary structure away from its stable equilibrium position with tensioning of the elastic element, up to a limit beyond which the secondary structure is released by relaxation effect to vibrate at a resonance frequency.
Sorin Crm Sas
04/02/15
20150092623

Antenna module and a wireless communication


An antenna module for wireless communication comprises an antenna element, a first port and a second port. The antenna element comprises a first resonance frequency and a second resonance frequency.
04/02/15
20150091766

Broadband capacitively-loaded tunable antenna


A broadband capacitively-loaded tunable antenna, and device there for is provided. The device comprises: an antenna feed; a first radiating arm connected to the antenna feed; a second radiating arm capacitively coupled to the first radiating arm; an adjustable reactance device connecting the second radiating arm to one or more of a ground and a third radiating arm; and, a processor in communication with the adjustable reactance device, the processor configured to adjust a reactance of the adjustable reactance device to tune a resonance frequency of a combination of the second radiating arm, the adjustable reactance device, and, when present, the third radiating arm..
Blackberry Limited
03/26/15
20150085608

Air-spring compensation in a piston-type marine vibrator


Embodiments relate to the restriction of gas flow in a piston-type marine vibrator to compensate for air-spring effects. An embodiment provides marine vibrator comprising: a containment housing; a piston plate; a fixture coupled to the containment housing; a mechanical spring element coupled to the piston plate and to the fixture; a driver coupled to the piston plate and to the fixture; and a variable gas flow restrictor disposed in an interior volume of the marine vibrator, wherein the marine vibrator has a resonance frequency selectable based at least in part on the variable gas flow restrictor..
Pgs Geophysical As
03/26/15
20150085607

Piston integrated variable mass load


Embodiments relate to relate to marine vibrators that incorporate one or more piston plates that act on the surrounding water to produce acoustic energy. An example marine vibrator may comprise: a containment housing; a piston plate; a fixture coupled to the containment housing; a mechanical spring element coupled to the piston plate and the fixture; a driver disposed in the marine vibrator, wherein the driver is coupled to the piston plate and the fixture; and a container coupled to the piston plate, wherein the container is configured to hold a variable mass load; wherein the marine vibrator has a resonance frequency selectable based at least in part on the variable mass load..
Pgs Geophysical As
03/26/15
20150085569

Electric field ferromagnetic resonance excitation method and magnetic function element employing same


To realize an electric field-driven type ferromagnetic resonance excitation method of low power consumption using an electric field as drive power, and provide a spin wave signal generation element and a spin current signal generation element using the method, a logic element using the elements, and a magnetic function element such as a high-frequency detection element and a magnetic recording device using the method. A magnetic field having a specific magnetic field application angle and magnetic field strength is applied to a laminate structure in which an ultrathin ferromagnetic layer sufficiently thin so that an electric field shield effect by conduction electrons does not occur and a magnetic anisotropy control layer are directly stacked on each other and an insulation barrier layer and an electrode layer are arranged in order on an ultrathin ferromagnetic layer side.
National Institute Of Advanced Industrial Science And Technology
03/26/15
20150084833

Embedded antenna


An embedded antenna includes: a metal protrusion portion for providing a first resonance frequency; a co-axial cable for providing a second resonance frequency; and a ground portion. The co-axial cable is fixed and electrically connected to the ground portion.
Quanta Computer Inc.
03/26/15
20150084716

Duplexer


A duplexer includes a reception filter that is connected between a reception terminal and an antenna terminal and includes one or a plurality of series resonators that are acoustic wave resonators, and a transmission filter that is connected between a transmission terminal and the antenna terminal and includes one or a plurality of acoustic wave resonators, a resonance frequency of a first series resonator that is one of the one or the plurality of series resonators and is closest to the antenna terminal in the reception filter being higher than an upper limit frequency of a reception band of the reception filter.. .
Taiyo Yuden Co., Ltd.
03/26/15
20150084607

Power supply apparatus


A power supply apparatus includes a power supply section and a control section. The power supply section includes a first switch which performs switching of power-supply output, an inductor and a capacitor which form an lc circuit that resonates current flowing through the first switch, and a second switch which changes capacitance of the capacitor.
Fujitsu Limited
03/19/15
20150080567

Method to produce and scale-up cocrystals and salts via resonant acoustic mixing


A method to produce and manufacture cocrystals and salts is disclosed wherein crystalline solids and other components were combined in the desired proportions into a mixing chamber and mixed at high intensity to afford a cocrystalline product. No grinding media were required.
Nalas Engineering Services Inc.
03/19/15
20150078130

Device and lateral environment detection of a motor vehicle


A device for lateral environment detection of a motor vehicle and a method for the substantially simultaneous operation of a parking support device and a door protection device is provided. The parking support device and the door protection device perform an environment detection with structurally identical environmental sensors.
Volkswagen Aktiengesellschaft
03/12/15
20150071792

Linear motor, a linear compressor, a controlling a linear compressor, a cooling system, and a linear compressor controlling a system


A linear motor (10), a linear compressor (100), a method of controlling a linear compressor (100), a cooling system (20) and a system of controlling a linear compressor (100) to operate a linear compressor (100) in resonance in it's the greatest possible efficiency throughout its operation are described. One of the ways of achieving these objectives is by means of a linear compressor (100) applicable to a cooling system (20), the linear compressor (100) comprising a piston (1) driven by a linear motor (10), the piston (1) having displacement range controlled by means of a controlled voltage (vm), the controlled voltage (vm) having a voltage frequency (φp) applied to the linear motor (10) and adjusted by a processing unit (22), the range of piston (1) displacement being dynamically controlled in function of a variable demand of the cooling system (20), the linear compressor (100) having a resonance frequency, the processing unit (22) adjusting the range of piston (1) displacement, so that the linear compressor (100) will be dynamically kept on resonance throughout the variations in demand of the cooling system (20)..
Whirlpool S.a.
03/12/15
20150070246

Reflectarray


A reflectarray reflects an incident wave in a desired direction, and the reflectarray includes a plurality of elements arranged in a first direction and in a second direction perpendicular to the first direction. The elements reflect the incident wave.
Ntt Docomo, Inc.
03/05/15
20150063600

Audio signal processing apparatus, method, and program


An audio signal processing apparatus that includes a band division section, an analysis section, a gain adjustment amount calculation section, and a gain adjustment section. The band division section is configured to generate a resonance in-band signal by band division on an audio input signal.
Sony Corporation
03/05/15
20150061610

Controller and a controlling a process variable and a power supply circuit comprising a power supply and a controller


A controller (100; 200) for controlling a process variable (202) comprises an input interface (102) configured to receive a feedback signal indicative of an error between a process variable (202) to be controlled and a setpoint (104) for the process variable. At least a first integrator is (108) configured to derive an accumulated error signal using an integrator input signal depending on the feedback signal and at least one resonator having a predetermined resonance frequency is configured to provide a resonator output signal using a resonator input signal depending on the feedback signal.
02/26/15
20150057653

Medical wireless power supply system


A medical wireless power supply system includes a trocar, a power transmission coil provided in a state in which at least a part thereof is covered with a nonconductive member, a power transmission coil unit including the power transmission coil and configured to be capable of resonating at a predetermined resonance frequency, a medical instrument including a cylindrical insertion portion insertable into an insertion hole of the trocar, a power reception coil provided in a state in which at least a part thereof is covered with a nonconductive member on an inside of the insertion portion, and a power reception coil unit including the power reception coil and configured to be capable of resonating at a resonance frequency that coincides with the predetermined resonance frequency.. .
Olympus Corporation
02/26/15
20150054808

Driving device, electronic device, and drive control program


A driving device includes a storage unit configured to store waveform data of driving signals whose phase is shifted by π/2 from a sinusoidal wave satisfying a frequency f1=m/n×f0 (m, n are natural numbers, and m≠n) where a resonance frequency of. An actuator is f0, wherein the; driving signals excite the actuator for an m number of times and stop exciting the actuator at a point other than a center point of amplitude; and a processor programmed to execute a process including reading the waveform data stored in the storage unit and outputting, to the actuator, the driving signals corresponding to the waveform data that has been read..
Fujitsu Limited
02/26/15
20150054770

Driving device, electronic device, and drive control program


A driving device includes a storage unit configured to store waveform data of driving signals of a sinusoidal wave satisfying a frequency f1=m/n×f0 (m, n are natural numbers and m≠n) where a resonance frequency of an actuator is f0, wherein the driving signals excite the actuator for an m number of times; and a processor programmed to execute a process including reading the waveform data stored in the storage unit and outputting, to the actuator, the driving signals corresponding to the waveform data that has been read.. .
Fujitsu Limited
02/26/15
20150054769

Driving device, electronic device, and drive control program


A driving device includes a storage unit configured to store waveform data of driving signals for stopping excitation of an actuator at a sinusoidal wave of a resonance frequency of the actuator, at portions other than a center point of an amplitude of the sinusoidal wave; and a processor programmed to execute a process including reading the waveform data stored in the storage unit and outputting, to the actuator, the driving signals corresponding to the waveform data that has been read.. .
Fujitsu Limited
02/26/15
20150054701

Electronic device and operating the same


An electronic device including a processor and an antenna device is provided. The antenna device includes a power feeding unit, a first radiation section connected to the power feeding unit, and a switching element including a first terminal electrically connected to first portion of the first radiation section, and a second terminal electrically connected to a second portion of the first radiation section.
Samsung Electronics Co., Ltd.
02/26/15
20150054355

System and triggering power transfer across an inductive power coupling and non resonant transmission


A triggerable power transmitter for power transmission from a primary coil to an inductively coupled secondary coil in a power receiver has a primary coil; a driver for electrically driving the primary coil; a front end receiving analog signal indicative of resonance properties of the primary coil and generating digital information in response to the analog signal; and a processor capable of: determining if said primary coil is coupled to a secondary coil based on the digital information, and triggering power from the primary coil to said secondary coil when said primary coil is inductively coupled to said secondary coil. The effective inductance of the primary coil increases reducing the resonance frequency when a secondary coil is inductively coupled to the primary coil.
Powermat Technologies Ltd.
02/26/15
20150053671

Microwave frequency setting device, microwave frequency setting method, and recording medium


According to a microwave frequency setting device, an additional signal source outputs an additional signal. An adder adds the additional signal to a microwave to output the microwave thus-obtained.
Advantest Corporation
02/26/15
20150053007

Method and system for authenticating a device


Method for authenticating a timepiece comprising measuring acoustic vibrations emitted by said timepiece to obtain an electrical signal indicating magnitude information comprising a variation of a magnitude of the measured acoustic vibrations as a function of time. The electrical signal comprises at least one specific tone associated with the presence of a quartz resonator in the timepiece.
Sicpa Holding Sa
02/19/15
20150051817

Drive control device and drive control hybrid electric vehicle


A hybrid electric vehicle comprises an internal combustion engine and an electric motor/generator connected via a first clutch. In response to a system stop request in a vehicle stop state, a rotation speed of the internal combustion engine is decreased to a predetermined rotation speed higher than a predetermined resonance frequency band by a negative torque applied to the internal combustion engine from the electric motor/generator via the first clutch.
Nissan Motor Co., Ltd.
02/19/15
20150048893

Resonator arrangement and exciting a resonator


A method for exciting a resonator having a resonance frequency, the resonator is excited in a first period with a first frequency that differs from the resonance frequency by a first frequency difference is provided. During a second period, the resonator is excited with a second frequency that differs from the resonance frequency by a second frequency difference.
Siemens Aktiengesellschaft
02/12/15
20150042330

Determining the form of rf pulses for selective excitation in magnetic resonance imaging


Wherein m(lr,t) stands for a desired transversal magnetization after the selective excitation, t stands for a time, {right arrow over (r)} stands for a position vector and t stands for a duration of a pulse, and whereby s(t) stands for a magnetic resonance signal, v stands for a volume that is to be examined, t2 stands for a transversal relaxation time, and ωs stands for a shift of the resonance frequency. The invention also relates to a nuclear spin tomograph for carrying out the magnetic resonance method..
02/12/15
20150042171

Non-contact power transmission device drive method and non-contact power transmission device


A primary coil (l1) is excited by selectively using: a first resonance frequency (al) near a frequency determined by the primary coil (l1) and a primary-side capacitor (c), said primary coil (l1) being placed in a power-supply area (ar); and a second resonance frequency (bl) near a frequency determined by a secondary-side inductance component and a secondary-side capacitance component, said components existing when the primary coil (l1) faces a secondary coil (l2).. .
Panasonic Corporation
02/05/15
20150035526

Magnetic sensor including a lorentz force transducer driven at a frequency different from the resonance frequency, and driving a lorentz force transducer


A magnetic-field sensor, including: a die, a current generator in the die. The current generator generating a driving current.
Stmicroelectronics S.r.l.
02/05/15
20150034795

Pneumatic suspension and vibration isolation system employing low friction cable isolators


The present invention provides a suspension and vibration isolation system having cable isolators. The cable isolators employ low-friction air-bearing pneumatic cylinders and cables to isolate a suspended payload from vibrations of a carrier or to isolate the carrier from vibrations of the payload.
Vale S.a.
01/29/15
20150032046

Energy-based treatment methods for refractory gout


A method of performing a medical procedure is disclosed. The method includes: positioning an energy delivery device configured to deliver energy adjacent uric acid (ua) crystals having a resonance frequency; applying energy to tissue through the energy delivery device at a predetermined frequency thereby resonating the ua crystals; debulking at least a portion of the ua crystals; and removing at least a portion of the debulked ua crystals..
Covidien Lp
01/29/15
20150031315

Rf device and method with improved active load modulation capability


There is described an rf bidirectional communication device utilizing active load modulation, the device comprising (a) a resonance circuit including an antenna (326), and (b) a control unit (322) for controlling communication of the device, including switching between a transmission mode and a receiving mode, wherein the control unit is adapted to (c) modify a configuration of the resonance circuit such that the resonance circuit has a first resonance frequency (f0) when the device is in the transmission mode and a second resonance frequency (f0+Δf) when the device is in the receiving mode, and (d) modify the configuration of the resonance circuit such that a q-factor of the resonance circuit is periodically decreased while the device is in the transmission mode. There is also described a corresponding method and a system comprising a rf device and a reader/writer device.
Nxp B.v.
01/29/15
20150031313

Single differential-inductor vco with implicit common-mode resonance


A circuit for a single differential-inductor oscillator with common-mode resonance may include a tank circuit formed by coupling a first inductor with a pair of first capacitors; a cross-coupled transistor pair coupled to the tank circuit; and one or more second capacitors coupled to the tank circuit and the cross-coupled transistors. The single differential-inductor oscillator may be configured such that a common mode (cm) resonance frequency (fcm) associated with the single differential-inductor oscillator is at twice a differential resonance frequency (fd) associated with the single differential-inductor oscillator..
Broadcom Corporation
01/29/15
20150030169

Method of controlling sound reproduction of enclosure mounted loudspeakers


A method of controlling sound reproduction may include applying an audio signal to a voice coil of the electrodynamic loudspeaker to produce sound, detecting one of an impedance and admittance of the loudspeaker across a predetermined audio frequency range based on a detected voice coil current and voice coil voltage and determining a fundamental resonance frequency of the loudspeaker based on the detected impedance or admittance. The fundamental resonance frequency of the loudspeaker may be compared with a nominal fundamental resonance frequency of the loudspeaker representing a nominal acoustic operating condition of the loudspeaker.
Analog Devices A/s
01/29/15
20150030167

Method of detecting enclosure leakage of enclosure mounted loudspeakers


A method of detecting enclosure leakage of an electrodynamic loudspeaker mounted in an enclosure or box may include applying an audio signal to a voice coil of the electrodynamic loudspeaker through an output amplifier and detecting a voice coil current flowing into the voice coil. A voltage across the voice coil may be detected and an impedance or admittance of the loudspeaker across a predetermined audio frequency range may be detected based on the detected voice coil current and voice coil voltage.
Analog Devices A/s
01/29/15
20150028958

Differential oscillator


A differential oscillator includes a resonator, a differential amplifier circuit, and a filter. The filter is disposed in parallel to the resonator and the differential amplifier circuit.
Nihon Dempa Kogyo Co., Ltd.
01/29/15
20150027199

Circuit to extend frequency response of accelerometer


A compensation circuit connected to an accelerometer's output extends the frequency response of the accelerometer, while reducing noise produced by the accelerometer. The compensation circuit has a gain as a function of frequency that is (i) constant up to a first frequency that is less than the accelerometer's natural resonance frequency, and (ii) reduced to approximately zero at a second frequency that is greater than the accelerometer's natural resonance frequency..
01/22/15
20150023515

Earphone with noise reduction


The second diaphragm (13) attenuates acoustic signals entering the rear cavity (10) from ambient space (6) at frequencies above the resonance frequency and virtually increases the acoustic compliance of the rear cavity (10) at frequencies below the resonance frequency. The earphone (1, 201, 401, 601) thus behaves as an acoustically closed earphone at frequencies above the resonance frequency and as an acoustically open earphone at frequencies below the resonance frequency..
01/22/15
20150022411

Method and system for multiple feed point antennas


An antenna, including a radiating element configured to have a fundamental resonance frequency being regarded as a first harmonic resonance frequency fo, and feed points positioned on the configured radiating element at selected multiple locations that correspond to where a multiple of the first harmonic resonance frequency have current maxima, wherein feeds at the feed points cooperate at an operating frequency of the antenna to constructively combine their respective antenna radiation patterns.. .
Blackberry Limited
01/22/15
20150021483

Vibrating mirror element, distance measuring apparatus, and projector


A vibrating mirror element includes a drive control portion configured to control the driving of a correction drive portion to keep the turning angle velocity of a mirror portion substantially constant by oscillating the mirror portion about an axis at a non-resonance frequency in a direction opposite to a direction in which a resonant drive portion oscillates the mirror portion.. .
Funai Electric Co., Ltd.
01/15/15
20150016620

Transducer with motion control


An audio system comprises an electroacoustic transducer (1) with transducer connections (12, 13) to receive an audio signal (as) in the audio frequency range from a driver circuit (14) and measure means (11) to measure the excursion of a diaphragm (3) of the electro-acoustic transducer (1), wherein a sensor signal source (16) provides a sensor signal (ss) at the transducer connections (12, 13) with a sensor frequency beyond the audio frequency range and in the range of the resonance frequency of the electro-acoustic transducer and, wherein the measure means (11) comprise a sensor circuit (18) to sense changes of the impedance of the electro-acoustic transducer (1) for the sensor signal (ss) at the transducer connections (12, 13) caused by the excursion of the diaphragm (3) due to the audio signal (as).. .
Knowles Ipc (m) Sdn. Bhd.
01/15/15
20150015863

Radiation source and lithographic apparatus


The present invention provides a method of monitoring the operation of a radiation source fuel droplet stream generator comprising a fuel-containing capillary and a piezo-electric actuator (500). The method comprises analysing the resonance frequency spectrum of a system comprising the fuel-containing capillary and the piezo-electric actuator in particular to look for changes in the resonance frequencies of the acoustic system which may be indicative of a change in the properties of the system requiring investigation..
Asml Netherland B.v.
01/15/15
20150013462

Ultrasound diagnostic device and ultrasound probe


In order to reduce the variation of transmitting and receiving sensitivity among a plurality of cmut cells, an ultrasound diagnostic device comprises: a plurality of cmut cells each having a vibrating membrane that vibrates when ultrasound is transmitted to or received from a subject; an upper electrode and a lower electrode disposed facing each other on mutually opposite sides of each of the cmut cells to apply a bias voltage to each of the cmut cells by a bias power supply; and transmitting and receiving correction units for each correcting the voltage supplied from the bias power supply by using a function using at least one parameter of the thickness and resonance frequency of the vibrating membrane of each of the cmut cells.. .
Hitachi Aloka Medical, Ltd.
01/08/15
20150012230

Method of measuring micro- and nano-scale properties


This invention is a novel methodology for precision metrology, sensing, and actuation at the micro- and nano-scale. It is well-suited for micro- and nano-scale because it leverages off the electromechanical benefits of the scale.
01/08/15
20150011899

Device and monitoring variation of animal respiration and/or heartbeat


A method of monitoring variation in either or both respiration and heartbeat of an animal comprising the steps of vibrating a piezoelectric vibrator by continuously or intermittently applying an ac voltage of a frequency corresponding to a natural resonance frequency of the vibrator to the piezoelectric vibrator under such condition that the vibrator is placed directly or indirectly in contact with the surface of the animal's body; collecting a current generated by the vibrator under vibration; and calculating an impedance of the vibrator from a value of the current and a value of the ac voltage applied to the vibrator so as to continuously or intermittently detect variation of the impedance by lapse of time is effective to monitor variation of respiration and/or heartbeat of animals including humans who are in sleep or under exercise and take a variety of positions with high sensitivity.. .
Ueda Japan Radio Co., Ltd.
01/08/15
20150008755

Electric power receiving device and non-contact power supply system


In a non-contact power supply system, an electric power receiving device with suppressed heat generation is provided. The electric power receiving device is configured with a resonance circuit which includes a resonance capacity and a resonance coil acting as a receiving antenna, and receives electric power in a non-contact manner using resonant coupling of the resonance circuit.
Renesas Electronics Corporation


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Resonance Frequency topics: Resonance Frequency, Circuit Switch, Addressing, Signal Processing, Low Frequency, Ultrasonic, Transducer, Piezoelectric, Shift Module, Frequency Band, Blood Pressure, Wireless Power, Circuit Switching, Fault Detection, Ground Fault Detection Circuit

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