| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 331001000 |
AUTOMATIC FREQUENCY STABILIZATION USING A PHASE OR FREQUENCY SENSING MEANS
| 709 |
| 331107000 |
SOLID STATE ACTIVE ELEMENT OSCILLATOR
| 506 |
| 331154000 |
ELECTROMECHANICAL RESONATOR
| 366 |
| 331057000 |
RING OSCILLATORS
| 165 |
| 331940100 |
MOLECULAR OR PARTICLE RESONANT TYPE (E.G., MASER)
| 128 |
| 331046000 |
PLURAL OSCILLATORS
| 101 |
| 331044000 |
WITH FREQUENCY CALIBRATION OR TESTING
| 56 |
| 331068000 |
WITH OUTER CASING OR HOUSING
| 56 |
| 331177000 |
WITH FREQUENCY ADJUSTING MEANS
| 53 |
| 331070000 |
WITH TEMPERATURE MODIFIER
| 50 |
| 331065000 |
WITH DEVICE RESPONSIVE TO EXTERNAL PHYSICAL CONDITION
| 49 |
| 331175000 |
FREQUENCY STABILIZATION
| 33 |
| 331185000 |
WITH PARTICULAR SOURCE OF POWER OR BIAS VOLTAGE
| 22 |
| 331167000 |
L-C TYPE OSCILLATORS
| 21 |
| 331045000 |
POLYPHASE OUTPUT
| 20 |
| 331143000 |
RELAXATION OSCILLATORS
| 18 |
| 331074000 |
COMBINED WITH PARTICULAR OUTPUT COUPLING NETWORK
| 18 |
| 331096000 |
WITH DISTRIBUTED PARAMETER RESONATOR
| 17 |
| 331182000 |
AMPLITUDE CONTROL OR STABILIZATION
| 12 |
| 331078000 |
ELECTRICAL NOISE OR RANDOM WAVE GENERATOR
| 8 |
| 331172000 |
WITH SYNCHRONIZING, TRIGGERING OR PULSING CIRCUITS
| 7 |
| 331037000 |
BEAT FREQUENCY
| 6 |
| 331132000 |
NEGATIVE RESISTANCE OR NEGATIVE TRANSCONDUCTANCE OSCILLATOR
| 6 |
| 331135000 |
PHASE SHIFT TYPE | 5 |
| 20100264996 | Nth-Order Arbitrary-Phase-Shift Sinusoidal Oscillator Structure and Analytical Synthesis Method of Making the same - Nth-order voltage- and current-mode arbitrary phase shift oscillator structures are synthesized using n operational trans-conductance amplifiers (OTAs) or second-generation current controlled conveyors (CCCIIs) and n grounded capacitors. Linking up the I/O characteristics of the OTA and the CCCII and the reactance of grounded capacitor, the step of synthesis is first based on the algebraic analysis to oscillatory characteristic equations, resulting in a quadrature oscillator structure. Secondly, instead of the quadrature characteristic, to control each output signal with one another by a desired phase difference > or <90°, selectively superposing any of two fundamental OTA/CCCII-C sub-circuitries benefits the transformation of quadrature to arbitrary-phase-shift characteristic for the sinusoidal oscillator structure. Furthermore, several compensation schemes are presented for reducing the output parameter deviation due to the non-ideal effects. | 10-21-2010 |
| 20090115541 | CIRCUIT FOR PHASE LOCKED OSCILLATORS - The present invention pertains to a circuit comprising a DC current source and at least two spin torque oscillators, the at least two spin torque oscillators being electrically coupled to each other and to the DC current source. A circuit comprising phase shifting means is connected in such a way as to cause a phase shift between current and voltage through the spin torque oscillators. An advantage of the present invention is that the controlled phase shift significantly increases the tolerance for deviating anisotropy fields, which makes manufacturing of spin torque oscillator devices much more feasible in practice. | 05-07-2009 |
| 20100237958 | FEED-BACK AND FEED-FORWARD SYSTEMS AND METHODS TO REDUCE OSCILLATOR PHASE-NOISE - Systems, methods, and apparatus are described that provide for low phase-noise, spectrally-pure, and low-jitter signals from electrical oscillators. An aspect of the present disclosure includes utilization of an open-loop feed-forward phase-noise cancellation scheme to cancel phase noise, or jitter, of an electrical oscillator. Phase noise can be measured and then subtracted, with the phase noise measurement and subtraction being performed at a speed faster than phase noise variations of the oscillator. Another aspect of the present disclosure includes use of a feedback scheme for phase noise reduction. A feedback scheme can be used alone or in conjunction with a feed-forward scheme. Related phase-noise cancellation and/or reduction methods are described. Notch filter and RF amplifier circuits are also described. | 09-23-2010 |
| 20140085017 | MEMS DEVICE OSCILLATOR LOOP WITH AMPLITUDE CONTROL - A MEMS device and method for amplitude regulation of a MEMS device are disclosed. In a first aspect, the MEMS device comprises a MEMS resonator, a limiter coupled to the MEMS resonator, and a regulator coupled to the limiter. The MEMS device includes an amplitude control circuit coupled to the MEMS resonator. The amplitude control circuit controls a supply of the limiter via the regulator to regulate oscillation loop amplitude of the MEMS device. In a second aspect, the method includes coupling a regulator to the limiter, coupling an amplitude control circuit to the MEMS resonator, and controlling a supply of the limiter via the regulator to regulate oscillation loop amplitude of the MEMS device. | 03-27-2014 |
| 20140306773 | SELF-OSCILLATION CIRCUIT HAVING MEANS FOR ELIMINATING QUADRATURE ERROR AND METHOD FOR ELIMINATING QUADRATURE ERROR USING THE CIRCUIT - Disclosed herein are a self-oscillation circuit having a means for eliminating a quadrature error and a method for eliminating a quadrature error using the circuit. The self-oscillation circuit having a means for eliminating a quadrature error according to an exemplary embodiment of the present invention includes: a voltage converter converting a current signal from the gyroscope sensor into a voltage signal, a signal magnitude detector measuring a magnitude of a quadrature error signal included in an output signal from the voltage converter, and a quadrature error eliminator generating a signal which has the same phase as the output signal from the voltage converter and the same magnitude as a signal measured by the signal magnitude detector, based on an output signal from the signal magnitude detector and the output signal from the voltage converter. | 10-16-2014 |
| 331060000 |
SINGLE OSCILLATOR WITH PLURAL OUTPUT CIRCUITS | 5 |
| 20090302953 | MAGNETIC OSCILLATOR WITH MULTIPLE COHERENT PHASE OUTPUT - Apparatus to generate signals with multiple phases are described. The apparatus includes a fixed multilayer stack providing a varying magnetic field and at least two sensors adjacent the fixed multilayer stack to sense the varying magnetic field and generate at least two output signals. The frequency of the output signals can be tuned by an input current. | 12-10-2009 |
| 20100283550 | MULTI-OUTPUT OSCILLATOR USING SINGLE OSCILLATOR AND METHOD OF GENERATING MULTIPLE OUTPUTS USING THE SAME - Provided are a multi-output oscillator using a single oscillator, and a method of generating multiple outputs. The multi-output oscillator includes: an oscillator outputting the single frequency; a multiplier multiplying the single frequency to output a first frequency; a first frequency divider dividing the single frequency by a first division factor; a first mixer outputting a second frequency by mixing an output of the first frequency divider and an output of the multiplier; a second frequency divider dividing the single frequency by a second division factor; a second mixer mixing the output of the second frequency divider and the output of the first mixer to output a third frequency; and a third mixer mixing the output of the second frequency divider and the output of the multiplier to output a fourth frequency. | 11-11-2010 |
| 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. The filter has a first resonance frequency in the first resonance mode and a second resonance frequency in the second resonance mode. The filter has a lower impedance at one frequency in one of the first resonance frequency and the second resonance frequency than an impedance at one frequency at another in the first resonance frequency and the second resonance frequency. The differential oscillator has a negative resistance at a frequency at which the impedance of the filter is higher while the differential oscillator does not have a negative resistance at a frequency at which the impedance of the filter is lower among the first resonance frequency and the second resonance frequency. | 01-29-2015 |
| 20150102862 | OSCILLATOR - The oscillator is provided with an oscillator | 04-16-2015 |
| 20160156310 | Apparatus and Method for Providing Oscillator Signals | 06-02-2016 |
| 331064000 |
WITH INDICATOR, SIGNAL, OR ALARM | 5 |
| 20090072915 | MINIATURE RF CALIBRATOR UTLIIZING MULTIPLE POWER LEVELS - A small light-weight battery operated calibrator device provides a precise sine wave output for use in calibration of test equipment, such as a RF Power Meter or a Spectrum Analyzer. The calibration device includes two power levels, one −40 dBm and one 0 dBm. The purpose of the two power levels is to obtain a slope and offset for correction of the RF power measuring device being calibrated. Operation indication LED lights are provided to indicate which of the two powers are in use, and if battery power is below acceptable levels. Miniature low power components including a crystal oscillator and a divide by 2 integrated circuit that generates a precise square wave and a low pass filter for converting the square wave into a precise sine wave allows the calibrator to be battery operated and stored as a calibration component. | 03-19-2009 |
| 20120194281 | Oscillation-Stop Detection Circuit, Semiconductor Device, Timepiece, And Electronic Device - An oscillation-stop detection circuit can be manufactured at low cost without requiring controlling difficult manufacturing process conditions. Inverter | 08-02-2012 |
| 20120280757 | SEMICONDUCTOR INTEGRATED CIRCUIT AND ABNORMAL OSCILLATION DETECTION METHOD FOR SEMICONDUCTOR INTEGRATED CIRCUIT - A semiconductor device includes a first oscillator that generates a first clock signal, a second oscillator that generates a second clock signal in response to the first clock signal, a third oscillator that generates a third clock signal, a counter that counts a signal corresponding to the first clock signal or a signal corresponding to the second clock signal during a predetermined period that is set based on the third clock signal to generate an overflow signal indicating that a count value of the signal corresponding to the first clock signal or the signal corresponding to the second clock signal exceeds a predetermined value, and an abnormality notice unit that receives the overflow signal to generate an abnormal signal indicating that an abnormal oscillation occurs in at least one of the first to third clock signals. | 11-08-2012 |
| 20160033567 | CRYSTAL OSCILLATOR MONITORING CIRCUIT - In an integrated circuit, a clock monitor circuit detects when an analog clock signal output by an on-chip crystal oscillator has stabilized. The clock monitor circuit uses an envelope follower circuit to monitor the envelope of the analog clock signal and compare the amplitude of the envelope with a predetermined amplitude value. When the predetermined value is reached and the envelope has remained steady for a predetermined time, an oscillator okay signal is generated. If an oscillator okay signal is not detected within another predetermined time, then an oscillator failure signal may be generated. | 02-04-2016 |
| 20160072510 | OSCILLATOIN CIRCUIT, OSCILLATOR, ELECTRONIC DEVICE, MOVING OBJECT, AND CONTROL METHOD OF OSCILLATOR - In order to reduce the possibility of erroneous switching of an operation mode, an oscillation circuit, an oscillator, an electronic device and a moving object including: a power source detecting section that detects a power supply state; a determining section that determines an input state of a predetermined signal; and a control section that switches a operation mode when the determining section determines that input of the predetermined signal is detected within a predetermined time after it is detected that power is supplied, and a control method of the oscillator are provided. | 03-10-2016 |
| 331062000 |
WITH OSCILLATOR CIRCUIT PROTECTIVE MEANS | 4 |
| 20140232476 | Crystal Oscillation Device and Semiconductor Device - A wiring pattern for oscillation input signal and a wiring pattern for oscillation output signal are provided on a printed circuit board, and a wiring pattern for ground power source voltage is arranged in a region therebetween. A quartz crystal unit is connected between the wiring pattern for oscillation input signal and the wiring pattern for oscillation output signal and one ends of capacitors serving as load capacitors thereof are connected to the wiring pattern for ground power source voltage. Further, a wiring pattern for VSS is arranged so as to enclose these wiring patterns, and a wiring pattern for VSS is arranged also in a lower layer in addition thereto. By this means, reduction of a parasitic capacitance between an XIN node and an XOUT node, improvement in noise tolerance of these nodes and others can be achieved. | 08-21-2014 |
| 20150116043 | OSCILLATION CIRCUIT, OSCILLATOR, METHOD OF MANUFACTURING OSCILLATOR, ELECTRONIC DEVICE, AND MOVING OBJECT - An oscillation circuit includes a terminal XO which is connected to one end of a resonator, a terminal XI which is connected to the other end of the resonator, an oscillation unit which is electrically connected to the terminal XO and the terminal XI, a control voltage generation circuit, and a switch. The oscillation unit includes a variable capacitive element having one end which is connected to the terminal XO or the terminal XI. The switch controls electrical connection between the other end of the variable capacitive element and an output terminal of the control voltage generation circuit. | 04-30-2015 |
| 20150116044 | OSCILLATION CIRCUIT, OSCILLATOR, MANUFACTURING METHOD OF OSCILLATOR, ELECTRONIC DEVICE, AND MOVING OBJECT - An oscillation circuit includes: an oscillation unit which includes a first terminal and a second terminal connected to a resonator, a third terminal, a fourth terminal to which at least one of a power supply potential and a signal for inspecting the resonator is applied, a first switching unit which switches modes of electrical connection between the first terminal and the third terminal, and a second switching unit which switches modes of electrical connection between the second terminal and the fourth terminal. | 04-30-2015 |
| 20150116045 | OSCILLATION CIRCUIT, OSCILLATOR, METHOD OF MANUFACTURING OSCILLATOR, ELECTRONIC DEVICE, AND MOVING OBJECT - An oscillation circuit includes a terminal XO, a terminal XI, an oscillation unit, and a voltage generation circuit that generates a first voltage and a second voltage. The oscillation unit includes a variable capacitive element connected to the terminal XO or the terminal XI. In a first mode, a signal having a first amplitude is applied between the terminal XO and the terminal XI, and a first voltage is applied to the other end of the variable capacitive element. In a second mode, a signal having a second amplitude larger than an amplitude of the signal having the first amplitude is applied between the terminal XO and the terminal XI, a second voltage is applied to the other end of the variable capacitive element, and a voltage applied to the both ends of the variable capacitive element is lower than the maximum rated voltage of the variable capacitive element. | 04-30-2015 |
| 331086000 |
WITH MAGNETICALLY CONTROLLED SPACE DISCHARGE DEVICE (E.G., MAGNETRON) | 3 |
| 20140035686 | METHOD FOR VARYING OSCILLATION FREQUENCY OF HIGH FREQUENCY OSCILLATOR - The switching element is provided in a state of being electromagnetically coupled to the cavity resonator of the high frequency oscillator; the bias voltage applying terminal is connected to one electrode of the switching element; another electrode of the switching element is electrically connected to the cavity resonator (the anode shell in FIG. | 02-06-2014 |
| 20080231380 | Magnetron Oscillator - A magnetron ( | 09-25-2008 |
| 20080238558 | Magnetrons - A magnetron having a cathode | 10-02-2008 |
| 331105000 |
WITH PARASITIC OSCILLATION CONTROL OR PREVENTION MEANS | 3 |
| 20130328635 | OSCILLATOR - An oscillator configured to oscillate an electromagnetic wave, including: a negative resistance device; a microstrip resonator configured to determine an oscillation frequency of an electromagnetic wave excited by the negative resistance device; a resistance device and a capacitance device, which form a low-impedance circuit configured to suppress parasitic oscillation; and a strip conductor configured to connect the capacitance device of the low-impedance circuit and the microstrip resonator to each other, in which an inductance L of the strip conductor and a capacitance C of the microstrip resonator produce a resonance frequency of ½π√LC, and ¼ of an equivalent wavelength of the resonance frequency is larger than a distance between the negative resistance device and the resistance device of the low-impedance circuit via the strip conductor, is provided. | 12-12-2013 |
| 20140300423 | CLOCK GENERATING CIRCUIT HAVING PARASITIC OSCILLATION SUPPRESSING UNIT AND METHOD OF SUPPRESSING PARASITIC OSCILLATION USING THE SAME - Disclosed herein are a clock generating circuit having a parasitic oscillation suppressing unit and a method of suppressing parasitic oscillation using the same. An output VDD of a parasitic component eliminating circuit is maintained in a high or low state according to the condition in which the output VDD falls from the high state to the low state and the condition in which the output VDD rises from the low state to the high state based on a threshold voltage VSPH when an input signal of the parasitic component eliminating circuit is changed from 0 to 1 and a threshold voltage VSPL when the input signal of the parasitic component eliminating circuit is changed from 1 to 0. Undesired parasitic oscillation is eliminated (suppressed) by the parasitic component eliminating circuit provided between a oscillator and a buffer. | 10-09-2014 |
| 20150084708 | Low Phase Noise Voltage Controlled Oscillators - A voltage controlled oscillator (VCO) with low phase noise and a sharp output spectrum is desirable. The present disclosure provides embodiments of LC tank VCOs that generate output signals with less phase noise compared with conventional LC tank VCOs, while at the same time limiting additional cost, size, and/or power. The embodiments of the present disclosure can be used, for example, in wired or wireless communication systems that require low-phase noise oscillator signals for performing up-conversion and/or down-conversion. | 03-26-2015 |
| 331138000 |
BRIDGE TYPE | 2 |
| 20140285274 | Wien-Bridge Oscillator and Circuit Arrangement for Regulating a Detuning - An oscillator circuit includes a Wien-bridge oscillator. A non-detuned oscillating signal and a detuned oscillating signal are tapped from the Wien-bridge oscillator. A sum of a weighted detuned signal and a weighted non-detuned signal is coupled as feedback signal to the Wien-bridge to control the oscillation amplitude. | 09-25-2014 |
| 20160072437 | WEIN BRIDGE OSCILLATOR - An oscillator circuit that includes a Wien bridge oscillator circuit, a full-wave rectifier circuit, coupled to an output of the Wien bridge oscillator circuit, an integrator circuit, coupled to an output of the full-wave rectifier circuit, and a multiplier circuit. The multiplier circuit may include a first input coupled to the output of the Wien bridge oscillator circuit, and a second input, coupled to an output of the integrator, wherein the multiple signals are configured to provide dynamic gain control to the Wien bridge oscillator circuit. | 03-10-2016 |
| 331067000 |
WITH ELECTROMAGNETIC OR ELECTROSTATIC SHIELD | 1 |
| 20150295535 | REDUCING MISMATCH CAUSED BY POWER/GROUND ROUTING IN MULTI-CORE VCO STRUCTURE - Reducing coupling and mismatch in multi-core VCOs, including: arranging a plurality of inductors in a plurality of VCO cores in a parallel differential inductor configuration with shared leads to form a single node, wherein the plurality of inductors includes at least a first inductor and a second inductor; connecting power/ground traces to the first inductor from a first side only; and connecting the power/ground traces to the second inductor from another side different from the first side only to avoid making a current loop. | 10-15-2015 |
| 331187000 |
MISCELLANEOUS OSCILLATOR STRUCTURES | 1 |
| 20110133849 | LOW PHASE NOISE VOLTAGE-CONTROLLED OSCILLATOR (VCO) USING HIGH QUALITY FACTOR METAMATERIAL TRANSMISSION LINES - A voltage-controlled oscillator (VCO), specifically, a low phase noise VCO using metamaterial transmission lines including a signal plane on which transmission lines are etched in an interdigital fashion is provided. Though high quality resonators based on a metamaterial structure, improvement of the phase noise of the VCO and circuit miniaturization are achieved. | 06-09-2011 |
| 331071000 |
RAW A.C. USED AS SOURCE OF POWER OR BIAS | 1 |
| 20090121798 | HIGH POWER MICROWAVE WASTE MANAGEMENT - A variable capacitor power supply for a high-power, industrial magnetron is powered directly from a conventional, public-service, 4,160 volt and higher power line. The magnetron's output is removably attached to a tractor trailers or train boxcar fabricated as a microwave work chambers. Microwave work chambers are configured to dry waste, burn dried waste, enhance chemical processes, fix free nitrogen, burn waste metal, reclaim component metals from mixed waste metal, and for gasification, pyrolysis, and plasma waste disposal. Alternately, the microwave power supply is removably connected to an underground cave, configured as a microwave oven chamber, to microwave waste therein. The microwave power supply is located in the basement of a high rise building designed to convert the high rise building waste into heat and electricity. | 05-14-2009 |
| 331106000 |
WITH PERIODOIC OR REPETITIOUS AMPLITUDE VARYING MEANS (E.G., TREMOLO) | 1 |
| 20100127785 | Method for regulating an excited oscillation - In a method for regulating an excited oscillation of a system to a resonance case of the system, instantaneous values of the oscillating quantity are discretely recorded using one sampling frequency, and the sampling frequency is selected to be below twice a maximum frequency of the system. In addition, the following steps are provided: ascertaining an oscillation amplitude from the instantaneous values; regulating a control amplitude on the basis of the ascertained oscillation amplitude; specifying a control frequency on the basis of the control amplitude; generating a control oscillation in consideration of the control frequency; combining the oscillation amplitude and the control oscillation to form a control signal; and exciting the system in consideration of the control signal. | 05-27-2010 |
| 331079000 |
BEAM TUBE | 1 |
| 20150061784 | BACKWARD-WAVE OSCILLATOR IN COMMUNICATION SYSTEM - Provided is a backward-wave oscillator in a communication system, including a waveguide formed of a metamaterial. A unit structure of the waveguide may include: a top plate; a short-circuited stub; a bottom plate separated at a predetermined gap from the top plate, and having the short-circuited stub formed in the center thereof; a first metal pillar connecting the top plate at a first port positioned on one surface based on the short-circuited stub to the bottom plate at a second port positioned on the opposite surface of the first port based on the short-circuited stub; and a second metal pillar separated from the first metal pillar, and connecting the top plate at the second port to the bottom plate at the first port. | 03-05-2015 |
| 331126000 |
GASEOUS SPACE DISCHARGE DEVICE | 1 |
| 20090237170 | METHOD AND APPARATUS FOR ADVANCED FREQUENCY TUNING - A method and apparatus for tuning the operational frequency of an electrical generator coupled to a time-varying load is described. One illustrative embodiment rapidly calculates an error (reflection coefficient magnitude) at the current operational frequency of the electrical generator; adjusts the frequency of the electrical generator by an initial step size so; rapidly calculates a second error; and if the magnitude of the second error is smaller than the magnitude of the first error, then the step size is increased and the frequency is adjusted by the increased step size. | 09-24-2009 |
