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291results about "Frequency to phase shift conversion" patented technology
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High frequency component, communication apparatus, and method for measuring characteristics of high frequency component
InactiveUS20010050550A1Easy to measureSuppresses radiation and incidenceMagnetic/electric field screeningMeasurement leads/probesCommunication deviceVIT signals
A high frequency component is constructed such that the characteristics of a high frequency circuit that cannot be measured only by an outwardly extending terminal electrode are easily measured at the final-product stage. In the high frequency component, a substrate has an electrode pattern provided including a signal measuring electrode pad. Additionally, chip components are mounted on the substrate. A metal cover has a hole provided near the signal measuring electrode pad. Through the hole, a probe of a measuring apparatus is inserted from the outside to abut with the electrode pad. With the arrangement, a voltage signal obtained at a predetermined point of the high frequency circuit is measured.
Owner:MURATA MFG CO LTD
Inductively-coupled RF power source
ActiveUS20070114945A1Fast trackQuick changeSpectral/fourier analysisPulse automatic controlAudio power amplifierResonance
A system and method are disclosed for implementing a power source including a power amplifier that generates a radio-frequency power signal with an adjustable operating frequency. The power amplifier also generates a reference phase signal that is derived from the radio-frequency power signal. An impedance match provides the radio-frequency power signal to a plasma coil that has a variable resonance condition. A phase probe is positioned adjacent to the plasma coil to generate a coil phase signal corresponding to the adjustable operating frequency. A phase-locked loop then generates an RF drive signal that is based upon a phase relationship between the reference phase signal and the coil phase signal. The phase-locked loop provides the RF drive signal to the power amplifier to control the adjustable operating frequency, so that the adjustable operating frequency then tracks the variable resonance condition.
Owner:THERMO ELECTRON MFG
Method and system for digital spur cancellation
ActiveUS20060269004A1Spectral/fourier analysisAmplifier modifications to reduce noise influencePhase shiftedCarrier signal
A method and system for digital spur cancellation may include removing a spur in a left channel minus right channel (L−R) baseband signal generated from a FM signal. The L−R baseband signal may be generated by demodulating a sub-carrier, for example, by using CORDIC algorithm, in a signal demodulated from the FM signal. An orthogonal signal may also be generated by demodulating a sub-carrier, for example, by using CORDIC algorithm, in a signal demodulated from the FM signal. The phase of the orthogonal signal may be further adjusted to introduce a substantially −90° phase shift to spurs at a specific frequency. Accordingly, the spurs in the L−R baseband signal may be cancelled when the first L−R baseband signal is combined with the phase adjusted orthogonal signal.
Owner:NXP USA INC
Sweep manager for signal analysis
ActiveUS20050035966A1Facilitate rapid （and easy） specificationImprove performanceSpectral/fourier analysisTwo-way working systemsGraphicsGraphical user interface
System and method for specifying a signal analysis function. First user input is received, e.g., to a graphical user interface (GUI), indicating a parameter for a first operation implementing at least a portion of the function. The first operation is programmatically included in a sweep loop. Second user input is received specifying a sweep configuration for a sweep on the parameter. The signal includes signal data, e.g., signal plot data or tabular data. The sweep configuration includes: a range of values for the indicated parameter, a number of iterations for the sweep, an interpolation type, step size for the sweep on the indicated parameter, specific values in the range of values for the parameter, source for at least some of the sweep configuration, and / or resultant data. The sweep is performed on the parameter per the sweep configuration, generating resultant data which is stored, and optionally displayed, e.g., in the GUI.
Owner:NATIONAL INSTRUMENTS
Online microwave frequency detector and detecting method thereof based on cantilever beam and direct-type power sensor
InactiveCN103048540ANovel structureEasy to measureFrequency to phase shift conversionPower sensorPower combiner
The invention discloses an online microwave frequency detector and a detecting method thereof based on a cantilever beam and a direct-type power sensor. The detector is prepared on a GaAs substrate and comprises coplanar waveguide (CPW) transmission lines, four micro-electromechanical system (MEMS) cantilever beam structures of the completely same structure, a power combiner and three MEMS direct-type microwave power sensors of the completely same structure. The micro-electronic mechanical online microwave frequency detector provided by the invention not only has the advantages of being novel in structure and smaller in size, but also can realize online detection on a microwave signal frequency, and can be compatible with a GaAs single wafer microwave integrated circuit.
Owner:SOUTHEAST UNIV
Preventing False Locks in a System that Communicates With an Implanted Wireless Sensor
ActiveUS20070100215A1Avoid breakingIncrease opportunitiesEndoradiosondesCatheterRing downLine sensor
The present invention determines the resonant frequency of a wireless sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency. The system receives the ring down response of the sensor and determines the resonant frequency of the sensor, which is used to calculate a physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal. The system identifies false locks by detecting an unwanted beat frequency in the coupled signal, as well as determining whether the coupled signal exhibits pulsatile characteristics that correspond to a periodic physiological characteristic, such as blood pressure.
Owner:ST JUDE MEDICAL LUXEMBOURG HLDG II S A R L SJM LUX II
Communicating with an implanted wireless sensor
ActiveUS7439723B2Increase opportunitiesAvoid breakingModulated-carrier systemsEndoradiosondesLine sensorRing down
Owner:ST JUDE MEDICAL LUXEMBOURG HLDG II S A R L SJM LUX II
Self testing ground fault circuit interrupter (GFCI)
ActiveUS7443309B2Determines the operability of the switching deviceProtective switch detailsElectronic circuit testingStatus testGround failure
A self testing fault detector having a line side and a load side and a conductive path there between, said apparatus is provided. The self testing fault detector includes a controller, adapted to perform periodic status tests on a protection circuit of the self testing fault detector without interrupting power to the load.
Owner:HUBBELL INC
Communicating with an Implanted Wireless Sensor
ActiveUS20070210786A1Avoid breakingIncrease opportunitiesModulated-carrier systemsEndoradiosondesRing downLine sensor
The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.
Owner:ST JUDE MEDICAL LUXEMBOURG HLDG II S A R L SJM LUX II
Design-for-test modes for a phase locked loop
There is a desire to provide a testing method and apparatus that can be successfully integrated into a PLL and PLL-like circuits (e.g. frequency synthesizers, delay lock loops, etc.). It is desirable that the PLL or PLL-like circuit integrated with testing apparatus does not suffer from performance degradations during nominal (mission mode) operation. Furthermore, it is desirable that the PLL and the testing apparatus share the same interface. In order to produce a PLL having integrated testing apparatus, without having the PLL suffer severe performance degradations during nominal operation nor having the combination of the PLL and testing apparatus be unnecessarily large, a modified PLL integrated with testing apparatus is provided.
Owner:INTELLECTUAL VENTURES HOLDING 81 LLC
Communicating with an Implanted Wireless Sensor
The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.
Owner:ST JUDE MEDICAL LUXEMBOURG HLDG II S A R L SJM LUX II
Method and circuit for measuring on-chip, cycle-to-cycle clock jitter
The invention provides a method and circuit for measuring on-chip, cycle-to-cycle, jitter. Copies of a circuit comprising a programmable delay line, a programmable phase comparator, and two counters are placed at different locations on an IC near a clock signal. The programmable delay line creates a clock signal that is delayed by one clock cycle. This delayed clock signal is compared in time to the original clock signal by the programmable phase comparator. If the difference in time between the delayed clock signal and the clock signal is greater than the dead time, the first counter is triggered. If the difference in time is negative and the absolute value is greater than the dead time, the second counter is triggered. A statistical distribution, based on the values of the counters, is created. This distribution is used to predict on-chip, cycle-to-cycle jitter.
Owner:HEWLETT-PACKARD ENTERPRISE DEV LP
Communicating with an implanted wireless sensor
ActiveUS7466120B2Increase opportunitiesAvoid breakingEndoradiosondesSensorsLine sensorPhase difference
Aspects of the present invention determine the resonant frequency of a sensor by obtaining sensor signals in response to three energizing signals, measuring the phase of each sensor signal, and using a group phase delay to determine the resonant frequency. The phase difference between the first and second signal is determined as a first group phase delay. The phase difference between the second and third signal is determined as a second group phase delay. The first group phase delay and second group phase delay are compared. Based on the comparison, the system may lock on the resonant frequency of the sensor or adjust a subsequent set of three energizing signals.
Owner:ST JUDE MEDICAL LUXEMBOURG HLDG II S A R L SJM LUX II
Communicating with an Implanted Wireless Sensor
ActiveUS20070096715A1Increase opportunitiesAvoid breakingResistance/reactance/impedenceEndoradiosondesLine sensorRing down
The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.
Owner:ST JUDE MEDICAL LUXEMBOURG HLDG II S A R L SJM LUX II
Method and device for monitoring plasma discharges
InactiveUS20100231194A1Low costBroaden applicationElectric discharge tubesFrequency to phase shift conversionDisplacement currentAtomic physics
A method and a device (MON) for monitoring plasma-discharges during a surface treatment process are described. In this process electrodes within a gaseous medium are provided with an alternating voltage (UHV) for generating plasma. The monitoring device (MON) has a detector device (M1) for detecting a measurement signal (I) generated by the alternating voltage (UHV) within the gaseous medium, separating means (M2) for separating signal components above a preset frequency and evaluating means (M3) for evaluating the resulting separated signal components by comparing them with at least one preset reference. Preferably the generating of the plasma is achieved by dielectric barrier discharge and the electric current penetrating the medium, especially the dielectric displacement current, is measured as the measurement signal (I).
Owner:SCHOTT AG
Improved method and apparatus for measuring stability of frequency of time domain signal
InactiveCN1963543AReasonable compositionSimple compositionFrequency to phase shift conversionHeterodyning/beat-frequency comparisonFrequency stabilizationProcess measurement
This invention discloses one method and device to improve time zone signals frequency stability measurement, which comprises the following steps: reference time signals are processed through DDS technique to get stable and accurate circle signals; expending measurement frequency signals range to get better reference signals and signals to be tested at fine time measurement; using DDS unit to process measurement frequency signals; when circle sample time singles come, according to fine time measurement module minimum resolution rate to test signals to be tested with reference time signals minimum phase difference to make the meter work to fulfill frequency signal measurement.
Owner:JIANGHAN UNIVERSITY
Microelectronic machinery microwave frequency detector and its preparation method
InactiveCN101059541AImprove dynamic rangeDoes not require DC power consumptionFrequency to phase shift conversionSmall amplitudePower combiner
The invention relates to a micro electric mechanical microwave frequency checker, and a relative production, with simple structure, small amplitude of measuring signal, non direct-current power consumption, and easy integration. The checker uses gallium arsenide as a liner (1) arranged with a power distributor (a), a power synthesizer (b), a coplane waveguide line (e), and a fixing beam structure (c), wherein the object signal via the power distributor (a) generates two signals, to form an object signal and another object signal (Us1-Us2), the object signal Us1 is connected with the third port of the power synthesizer (b), the object signal Us2 via a section of a CPW line is connected to the second port of the synthesizer (b) in which port to obtain a first signal via the fixing beam structure (c) to obtain the phase shift phi of the microwave signal on the line with fixed length.
Owner:SOUTHEAST UNIV
Clock test apparatus and method for semiconductor integrated circuit
A clock test apparatus for a semiconductor integrated circuit includes a delay unit configured to delay an internal clock signal. A comparison unit compares the phase of an output signal of the delay unit with the phase of a reference clock signal. A phase discrimination unit receives a test mode signal, the reference clock signal, and an output signal of the comparison unit, thereby outputting a discrimination signal.
Owner:SK HYNIX INC
Microelectronic machinery microwave frequency detector and method for making same
InactiveCN101387664AOffset lossSuitable for measurementTelevision system detailsImpedence networksPower combinerCoplanar waveguide
The invention relates to a microelectronic mechanical microwave frequency detector and a preparation method thereof. The microelectronic mechanical microwave frequency detector has simple structure, can measure unknown microwave signals, has large amplitude range of the measurement signals, can avoid consuming direct current power, and is easy to be integrated. The microelectronic mechanical microwave frequency detector adopts a gallium arsenide substrate provided with a 1-to-3 power distributor (a), a coplanar wave guide transmission line (b), a 2-to-1 power distributor (c), a fixing beam structure (d) and a thermocouple structure (e), thereby forming the microelectronic mechanical microwave frequency detector.
Owner:SOUTHEAST UNIV
Combination test method and test device
InactiveUS20050156586A1Easy to testAccurate dataDigital circuit testingGenerating/distributing signalsTest inputLow speed
In the combination test method according to the present invention, by applying jitter to a first clock signal having a lower frequency than a second clock signal having a second frequency, jitter is superimposed onto data of a second format output by a transmission device at a data rate corresponding to the second frequency. Conventionally, in order to apply jitter to data having a high data rate, it has been necessary to use a highly expensive jitter generating device that is compatible with a high-speed signal, but in the present invention, since the signal to which the jitter is applied is a first clock signal of low speed, then a highly expensive jitter generating device is not required. Therefore, it is possible to easily test whether or not a receiving device inputting data of a second format can accurately reproduce data of a first format.
Owner:NEC ELECTRONICS CORP
Ventricular shunt system and method
A ventricular shunt systems and methods of preventing hydrocephalus are described herein. In one aspect, the ventricular shunt system has at least one pressure sensor that is configured to be selectively electromagnetically coupled to an ex-vivo source of RF energy and is variable in response to the pressure in a patient's ventricle.
Owner:ST JUDE MEDICAL LUXEMBOURG HLDG II S A R L SJM LUX II
Timing measurement device using a component-invariant vernier delay line
InactiveUS6850051B2Reduced measurement timeAvoid matching problemsPulse characteristics measurementsFrequency to phase shift conversionSingle stageMeasurement device
In recent years, much effort has been placed on improving the performance of timing and jitter measurement devices using Delay Locked Loop (DLL) and Vernier Delay Line (VDL) techniques. However, these approaches require highly matched elements in order to reduce differential non-linearity timing errors. In an attempt to reduce the requirement on element matching, a component-invariant VDL technique is disclosed that enables the measurement device to be synthesized from an RTL description. The present invention is based on a single-stage VDL structure, which is used to mimic the behavior of a complete VDL. Furthermore, as test time is an important consideration during a production test, a method and system is provided that reduces test time at the expense of additional hardware.
Owner:MCGILL UNIV
Hand-held tester and method for local area network cabling
InactiveUS6847213B2Low costReduce LAN measurement overhead support costsCurrent/voltage measurementResistance/reactance/impedenceTester deviceDisplay device
A LAN tester has display and remote units each having a connector jack attached to an adapter board for connection to the plug of a patch cord. Both the display and remote units have circuits which are capable of measuring the phase between a drive signal voltage and the corresponding coupled or reflected signal due to the drive signal. Scattering parameters for the mated connector pairs and the patch cord itself are measured during a field calibration. A computer in one or both of the tester units stores the measured scattering parameters and uses the scattering parameters to move the reference plane to any desired location along the patch cord. Channel link or permanent link tests can be conducted using the same equipment.
Owner:IDEAL IND NETWORKS LTD
Method and device for generating clock signal
ActiveUS7141961B2Pulse automatic controlModulated-carrier systemsVoltage controlVoltage-controlled oscillator
A method and device for generating a clock signal accurately synchronized with a wobble signal including jitter even if there are manufacturing differences between voltage controlled oscillators. The clock signal generation device includes a voltage controlled oscillator for generating a clock signal corresponding to each of a plurality of oscillation characteristics. The clock signal generation device applies a test voltage to a voltage controlled oscillator with a voltage control device and sequentially identifies a plurality of oscillation characteristics set for the voltage controlled oscillator. The clock signal generation device selects one of the identified oscillation characteristics that has a frequency range with a generally middle part in which the frequency of a wobble signal is located and has a smaller gain.
Owner:SEMICON COMPONENTS IND LLC
Determining electric grid endpoint phase connectivity
ActiveUS8207726B2Digital variable displayNoise figure or signal-to-noise ratio measurementElectricityElectrical connection
The service phase of the electrical connection to a customer endpoint device located within a power distribution system is determined by various techniques. At the feeder level, the system may be programmed to induce momentary power interruptions, thereby causing missed zero crossings at the customer endpoint devices. The pattern of these interruptions is a controlled one, designed specifically to avoid causing noticeable disruption even to sensitive devices, but to be unusual enough that it is statistically unlikely to be naturally occurring. The monitoring of the zero crossing information is used to determine the phase of the service line to the customer endpoint devices.
Owner:ITRON NETWORKED SOLUTIONS INC
Ventricular shunt system and method
A ventricular shunt systems and methods of preventing hydrocephalus are described herein. In one aspect, the ventricular shunt system has at least one pressure sensor that is configured to be selectively electromagnetically coupled to an ex-vivo source of RF energy and is variable in response to the pressure in a patient's ventricle.
Owner:ST JUDE MEDICAL LUXEMBOURG HLDG II S A R L SJM LUX II
Method & apparatus for accommodating device and/or signal mismatch in a sensor array
ActiveUS20070050161A1Improving noise discriminationIncrease the differenceSpeech analysisMicrophones signal combinationUltrasound attenuationSensor array
Noise discrimination in signals from a plurality of sensors is conducted by enhancing the phase difference in the signals such that off-axis pick-up is suppressed while on-axis pick-up is enhanced. Alternatively, attenuation / expansion are applied to the signals in a phase difference dependent manner, consistent with suppression of off-axis pick-up and on-axis enhancement. Nulls between sensitivity lobes are widened, effectively narrowing the sensitivity lobes and improving directionality and noise discrimination.
Owner:DOLBY LAB LICENSING CORP
Inductively-coupled RF power source
ActiveUS7459899B2Fast trackStable powerSpectral/fourier analysisPulse automatic controlAudio power amplifierResonance
A system and method are disclosed for implementing a power source including a power amplifier that generates a radio-frequency power signal with an adjustable operating frequency. The power amplifier also generates a reference phase signal that is derived from the radio-frequency power signal. An impedance match provides the radio-frequency power signal to a plasma coil that has a variable resonance condition. A phase probe is positioned adjacent to the plasma coil to generate a coil phase signal corresponding to the adjustable operating frequency. A phase-locked loop then generates an RF drive signal that is based upon a phase relationship between the reference phase signal and the coil phase signal. The phase-locked loop provides the RF drive signal to the power amplifier to control the adjustable operating frequency, so that the adjustable operating frequency then tracks the variable resonance condition.
Owner:THERMO ELECTRON MFG
Method for realizing test of embedded local-oscillator frequency converter by utilizing vector network analyzer
ActiveCN102680826AEasy to operateImprove test accuracyElectrical testingFrequency to phase shift conversionFrequency changerTelecommunications
The invention relates to a method for realizing test of an embedded local-oscillator frequency converter by utilizing vector network analyzer, and the method is characterized in that the vector network analyzer is used for performing the rough scanning to determine a general working frequency of a local oscillator and then for performing the precise scanning to determine the frequency difference through a phase and time curve, then a tuning reference passage phase is matched with the embedded local oscillator signal phase, and finally the measurement alignment of the frequency converter is performed. Due to the adoption of the method, the problems of large size, expensive cost, complicated test process, slow test speed and poor measurement precision caused by a test system consisting of multiple instruments and devices can be solved.
Owner:CHINA ELECTRONIS TECH INSTR CO LTD
Communicating with an implanted wireless sensor
ActiveUS20070247138A1Avoid breakingIncrease opportunitiesEndoradiosondesSensorsLine sensorPhase difference
Aspects of the present invention determine the resonant frequency of a sensor by obtain sensor signals in response to three energizing signals, measure the phase of each sensor signal, and using a group phase delay to determine the resonant frequency. The phase difference between the first and second signal is determined as a first group phase delay. The phase difference between the second and third signal is determined as a second group phase delay. The first group phase delay and second group phase delay are compared. Based on the comparison, the system may lock on the resonant frequency of the sensor or adjust a subsequent set of three energizing signals.
Owner:ST JUDE MEDICAL LUXEMBOURG HLDG II S A R L SJM LUX II
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