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55results about How to "Narrow down the frequency range" patented technology
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Resonant converters and control methods thereof
ActiveUS20150229225A1Improve performanceReducing switching-frequency rangeEfficient power electronics conversionDc-dc conversionTime delaysEngineering
Control methods for resonant converters offer improved performance in resonant converters that operate with a wide input-voltage range or a wide output-voltage range (or both) by substantially reducing the switching-frequency range. Reduction in the switching frequency range is achieved by controlling the output voltage with a combination of variable-frequency control and time-delay control. Variable-frequency control may be used to control the primary switches of an isolated resonant converter, while delay-time control may be used to control secondary-side rectifier switches provided in place of diode rectifiers. The secondary-side control may be implemented by sensing the secondary current or the primary current (or both) and by delaying the turning-off of the corresponding secondary switch with respect to the zero crossings in the secondary current or the primary current.
Owner:DELTA ELECTRONICS INC
Active noise cancellation in hearing devices
ActiveUS20090041260A1Reduced frequency rangeAttenuation of acoustic signalEar treatmentHearing device active noise cancellationAudio frequencyHearing perception
Disclosed is a hearing device system comprising at least one hearing aid circuitry and at least one active noise cancellation unit, the at least one hearing aid circuitry comprises at least one input transducer adapted to convert a first audio signal to an electric audio signal; a signal processor connected to the at least one input transducer and adapted to process said electric audio signal by at least partially correcting for a hearing loss of a user; an output transducer adapted to generate from at least said processed electric audio signal a sound pressure in an ear canal of the user, whereby the generated sound pressure is at least partially corrected for the hearing loss of the user; the at least one active noise cancellation unit being adapted to provide an active noise cancellation signal adapted to perform active noise cancellation of an acoustical signal entering the ear canal in addition to said generated sound pressure, wherein the hearing device system further comprises a combiner unit adapted to combine the processed electric audio signal with the active noise cancellation signal, to obtain a combined signal and to provide the combined signal to the output transducer.
Owner:OTICON
Induction vehicle detection and identification system, induction license plate, and induction reader
ActiveUS20150041536A1Guaranteed uptimeSimple systemRoad vehicles traffic controlDigital data processing detailsData accessVehicle detection
An induction vehicle detection and identification system comprising electronic identification devices with electronic memory, mounted on vehicles, and a reader capable of reading and / or writing data obtained from devices in HF-band. Devices have a non-volatile memory and are integrated into the vehicle's license plate. The reader combined with a magnetic frame is in a dielectric casing, which is mounted under the roadway. It generates an alternating magnetic field, which determines the detection and identification range. Minimum time the reader requires to read discrete responses generated by electronic identification devices and to identify the vehicle is less than 25 ms. The identification devices and the reader exchange data at the rate of 1 Kbit / sec or higher, and provide data encoding and decoding, as well as data access restriction.
Owner:MATSUR
Active noise cancellation in hearing devices
ActiveUS8229127B2Reduce and attenuate and block audio signalEnhanced signalEar treatmentHearing device active noise cancellationHearing apparatusEngineering
Disclosed is a hearing device system comprising at least one hearing aid circuitry and at least one active noise cancellation unit, the at least one hearing aid circuitry comprises at least one input transducer adapted to convert a first audio signal to an electric audio signal; a signal processor connected to the at least one input transducer and adapted to process said electric audio signal by at least partially correcting for a hearing loss of a user; an output transducer adapted to generate from at least said processed electric audio signal a sound pressure in an ear canal of the user, whereby the generated sound pressure is at least partially corrected for the hearing loss of the user; the at least one active noise cancellation unit being adapted to provide an active noise cancellation signal adapted to perform active noise cancellation of an acoustical signal entering the ear canal in addition to said generated sound pressure, wherein the hearing device system further comprises a combiner unit adapted to combine the processed electric audio signal with the active noise cancellation signal, to obtain a combined signal and to provide the combined signal to the output transducer.
Owner:OTICON
Portable raman spectrometer based on spectral analysis of micro electro mechanical system
InactiveCN103196889AMaintain detection resolutionHigh sensitivityRadiation pyrometryRaman scatteringRayleigh scatteringLine width
The invention provides a portable raman spectrometer based on spectral analysis of a micro electro mechanical system. On the basis of the micro electro mechanical system, the portable raman spectrometer comprises a laser light source, a raman probe head and a spectrum detection system of a spectrograph, wherein the laser light source comprises a semiconductor laser which is used for generating lasers, the power of the generated lasers is not less than 200 milliwatts, and the line width of the generated lasers is not greater than 0.2 nanometers; the raman probe head comprises a laser outputting optical path and a raman scattered light collecting optical path which does not comprise a light filter for filtering rayleigh scattered light; and the spectrograph comprises the spectrum detection system which sequentially consists of a focusing lens I, a digital micromirror device (DMD) module I, a collimating lens, a chromatic dispersion optical grid, a focusing lens II, a digital micromirror device (DMD) module II, a de-chromatic dispersion optical grid, a focusing lens III, a single-point detector and a signal processor. The portable raman spectrometer has the advantages of being capable of keeping the resolution ratio of spectrum detection and improving the sensitivity of spectrum detection, being suitable for detection on weak signals such as raman signals, and the like.
Owner:许春 +2
Dielectric materials for power transfer system
ActiveUS20110278940A1Reduce sensitivityImprove permeabilityElectromagnetic wave systemTransformersTransfer systemMaterials science
A contactless power transfer system is proposed. The power transfer system comprises a field-focusing element comprising a dielectric material. The dielectric material comprises a composition that is selected from the family of (Ba,Sr)TiO3 or CaCu3Ti4O12. The compositions of the (Ba, Sr)TiO3 include the materials such as Ca1-x-yBaxSryTi1-zCrzO3-δNp, wherein 0<x<1; 0<y<1; 0≦z≦0.01; 0≦δ≦1; and 0≦p≦1. The compositions of the CaCu3Ti4O12 include the materials such as Ca1-x-yBaxSry(Ca1-zCuz)Cu2Ti4-δAlδO12-0.5δ, wherein 0≦x<0.5; 0≦y<0.5; 0≦z<1; and 0≦δ≦0.1.
Owner:GENERAL ELECTRIC CO
System and methods for controlling secondary side switches in resonant power converters
ActiveUS9490704B2Improve performanceNarrow down the frequency rangeEfficient power electronics conversionApparatus with intermediate ac conversionTime delaysResonant power converters
Control methods for resonant converters offer improved performance in resonant converters that operate with a wide input-voltage range or a wide output-voltage range (or both) by substantially reducing the switching-frequency range. Reduction in the switching frequency range is achieved by controlling the output voltage with a combination of variable-frequency control and time-delay control. Variable-frequency control may be used to control the primary switches of an isolated resonant converter, while delay-time control may be used to control secondary-side rectifier switches provided in place of diode rectifiers. The secondary-side control may be implemented by sensing the secondary current or the primary current (or both) and by delaying the turning-off of the corresponding secondary switch with respect to the zero crossings in the secondary current or the primary current.
Owner:DELTA ELECTRONICS INC
Dual-band antenna
InactiveUS7466272B1Narrow down the frequency rangeIncrease rangeSimultaneous aerial operationsAntenna supports/mountingsAcute angleDual band antenna
A dual-band antenna has a ground portion, a connection portion with a feeding point separated from the ground portion and a short portion connected to the ground portion and the connection portion. The short portion and the ground portion are formed an acute angle therebetween. The connection portion respectively connect a first radiating portion and a second radiating portion. The first radiating portion and the second radiating portion are parallel to said ground portion. The short portion is arranged between the ground portion and the first radiating portion. When the dual-band antenna operates at wireless operation, the connection portion, the first radiating portion and the second radiating portion resonate to obtain a first frequency range and a second frequency range. The short portion is formed as a function of an inductance.
Owner:CHENG UEI PRECISION IND CO LTD
Heatable capacitor and circuit arrangement
InactiveUS20160094047A1Improve usabilityWide range of operationsBatteries circuit arrangementsTransformersCapacitanceResonance
A capacitor module having a capacitor and a heater is disclosed. The temperature of the capacitor can be measured by means of a temperature sensor and the temperature of the capacitor is influenced by the heater. The capacitance value changes as a function of the temperature. Thus a circuit apparatus having a resonance converter can be tuned thereby, since the capacitance value can be regulated or controlled.
Owner:SIEMENS AG
ANR measurement configuration method and device thereof
Provided is an ANR measurement configuration method and device thereof. In a CGI measurement direction process, a measurement report of a terminal is received. The measurement report carries frequency points measured by the terminal and a PCI. The frequency points used for measuring CGI of PCI are confirmed by the terminal. A frequency point group used for measuring CGI of the terminal configuration is confirmed according to the confirmed frequency points.CGI measurement is carried out by indicating the terminal according to the PCI and the frequency point group. In the process of measurement configuration of the strongest cell, statistical information of the strongest cell measurement is obtained. According to the statistical information, the frequency points used by the strongest cell measurement by the terminal are adjusted. The strongest cell measurement is carried out by the terminal according to the frequency point group after adjusting.
Owner:HUAWEI TECH CO LTD
Arrangement For Optimizing the Frequency Response of an Electro-Acoustic Transducer
InactiveUS20080240482A1Decrease Q （quality factor）Efficient reductionSolid-state devicesFrequency/directions obtaining arrangementsTransducerEngineering
An arrangement for optimizing the frequency response of an electro-acoustic transducer (10), comprising the electro-acoustic transducer (10) and a damping element (12) arranged behind the sound emanating or receiving side of a membrane (14) of the electro-acoustic transducer (10), wherein an air gap (16) is provided between the damping element (12, 13) and the membrane (14), which air gap (16) is sufficiently small for intimately acoustically coupling the membrane (14) with the damping element (12, 13), wherein the damping element (12, 13) is adapted to dampen an air flow created by the membrane (14) when moving.
Owner:KNOWLES ELECTRONICS ASIA
Pattern method and system for detecting foreign object debris
InactiveUS7214925B2Efficient methodMinimizes eyestrainPhotometryCounting objects on conveyorsForeign matterComputer science
A method of detecting a non-fixed object in a system (12) includes applying a light emitting or generating substance to multiple objects. The objects are illuminated with an object illuminator (13). At least one of the objects (10) is determined to be a nonmember within a known pattern of objects and is identified to be a non-fixed object in response to illumination of the objects.
Owner:THE BOEING CO
Frequency domain convolution blind source separation multi-band and multi-centroid clustering sorting method
InactiveCN108447493ANarrow down the frequency rangeImprove accuracySpeech analysisMulti bandFull band
The present invention discloses a frequency domain convolution blind source separation multi-band and multi-centroid clustering sorting method. The method comprises the steps of: (1) performing overlapping grouping of full-band signals, wherein the whole frequency band is uniformly divided into a plurality of sub bands, and overlapping frequency bands are arranged between the sub bands; (2) in each sub band, performing multi-centroid clustering and single-centroid clustering in order; (3) finding out frequency bands with failed sorting, performing resorting of the band signals to maximize thesum of coefficients of association of a separative signal amplitude envelope and a clustering center at the frequency band; and (4) traversing all the sub bands in order to complete sorting of the full-band signals. The frequency domain convolution blind source separation multi-band and multi-centroid clustering sorting method employs an overlapping sub-band multi-centroid clustering method to improve the clustering center, namely the precision of reference signals, reduce the probability of wrong arrangement among the sub bands. The simulation experiment shows that the method is good in accuracy, and can keep a good separation performance for the change of the short-time Fourier transform window in a certain range.
Owner:XI AN JIAOTONG UNIV
Double-focusing field electromagnetic tweezer implementation method based on time reversal spatial and temporal focusing mechanism
InactiveCN106373706AIncrease gradient forceImprove stabilityElectromagnets without armaturesPotential wellMagnetic field gradient
The invention discloses a double-focusing field electromagnetic tweezer implementation method based on a time reversal spatial and temporal focusing mechanism, and belongs to the technical field of electromagnetic wave non-contact operation and control. According to the implementation method, a TR electromagnetic wave spatial and temporal focusing transmission mechanism is used as foundation, and two parallel focusing spots are generated through a planar time reversal mirror; and a hollow region with extremely weak electromagnetic field strength generated by an electromagnetic interference cancellation mechanism is generated between the two focusing spots to form an electromagnetic field gradient trap to generate required thrust and gradient force, so as to catch or control tiny particles with electric neutrality or weak current. Compared with a single-spot electromagnetic wave focusing field, the double-focusing field can remarkably lower scattering force, improve the gradient force of the electromagnetic field trap, and overcome the shortcomings of relatively weak dynamic action of the electromagnetic wave at frequency band of less than optical frequency band; in addition, the trap depth of the electromagnetic field can be increased, and the stability of the electromagnetic field at frequency band of less than optical frequency band in catching and controlling particles can be improved; and in addition, a large amount of particles with electric neutrality or weak current can be constrained in the narrow and long hollow region at the same time.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Balance microstrip line transition full-mode dual-ridged integrated waveguide feed dipole printed antenna
ActiveCN102904011ASmall sizeMiniaturizationRadiating elements structural formsRadiation lossElectricity
The invention provides a balance microstrip line transition full-mode dual-ridged integrated waveguide feed dipole printed antenna which relates to a dipole printed antenna, and particularly to a balance microstrip line transition full-mode dual-ridged integrated waveguide feed dipole printed antenna. The invention solves the problems that the traditional balance microstrip line feed antenna can not be beneficial to application to an occasion needing longer feed distance due to larger radiation loss and a substrate integrated waveguide single-mode working bandwidth is narrower. A left oscillator and a right oscillator are symmetrically printed on the upper surface of the other end of an intermediate medium substrate along a center line of the intermediate medium substrate, the straight side of the left oscillator and the straight side of the right oscillator are respectively in parallel to the center line of the intermediate medium substrate and are far away from the center line, the arc-shaped side of the left oscillator is connected with a short balance microstrip line on the upper surface of the intermediate medium substrate, a load wafer is connected with the arc-shaped side of the left oscillator, and the middle of the arc-shaped side of the right oscillator is provided with a fourth metalized through hole. The invention is used in the field of radio.
Owner:HARBIN INST OF TECH
Digital delay-locked loop circuit using phase-inversion algorithm and method for controlling the same
InactiveUS8866522B1Wide operating frequency rangeShort lock timePulse automatic controlControl signalMultiplexer
Disclosed herein are a delay-locked loop circuit using a phase inversion locking algorithm and a method of controlling the same. There is provided a delay-locked loop circuit using a phase inversion locking algorithm, including a phase inversion controller configured to control whether or not to use the phase inversion locking algorithm by determining a phase error between an input clock signal and an output clock signal, an inverter configured to invert the input clock signal and output the inverted input clock signal, a multiplexer configured to receive the input clock signal and the inverted input clock signal of the inverter and output the input clock signal in response to the control signal of the phase inversion controller or the inverted input clock signal, and a delay-locked loop connected to the output terminal of the multiplexer and configured to perform phase synchronization in response to the output signal of the multiplexer.
Owner:HONGIK UNIV IND ACAD COOP FOUND
Induction vehicle detection and identification system, induction license plate, and induction reader
ActiveUS9317724B2Guaranteed uptimeSimple systemRoad vehicles traffic controlDigital data protectionData accessVehicle detection
An induction vehicle detection and identification system comprising electronic identification devices with electronic memory, mounted on vehicles, and a reader capable of reading and / or writing data obtained from devices in HF-band. Devices have a non-volatile memory and are integrated into the vehicle's license plate. The reader combined with a magnetic frame is in a dielectric casing, which is mounted under the roadway. It generates an alternating magnetic field, which determines the detection and identification range. Minimum time the reader requires to read discrete responses generated by electronic identification devices and to identify the vehicle is less than 25 ms. The identification devices and the reader exchange data at the rate of 1 Kbit / sec or higher, and provide data encoding and decoding, as well as data access restriction.
Owner:MATSUR
Combined semicircular dipole printed antenna of balance microstrip line transition waveguide feed
ActiveCN102904012ASmall sizeCompact structureRadiating elements structural formsAntennas earthing switches associationMiddle lineDipole
The invention provides a combined semicircular dipole printed antenna of balance microstrip line transition waveguide feed, which relates to a dipole printed antenna of balance microstrip line transition waveguide feed, and particularly to a combined semicircular dipole printed antenna of balance microstrip line transition waveguide feed. The invention solves the problems of poorer complanation, ultra-wideband, miniaturization, balance feed and directional diagraph symmetry of the traditional ultra-bandwidth antenna. A left oscillator assembly and a right oscillator assembly are symmetrically printed on the upper surface of the other end of an intermediate medium substrate along a center line of the intermediate medium substrate, the left oscillator assembly comprises a first semiwafer, a second semiwafer and a third semiwafer which are sequentially overlapped along the width direction of the intermediate medium substrate, a transition sheet is printed on the lower surface of the other end of the intermediate medium substrate, and is connected with a short balance microstrip line on the lower surface of the intermediate medium substrate, and a fourth metalized through hole is arranged in the first semiwafer of the right oscillator assembly. The invention is used in the field of radio.
Owner:HARBIN INST OF TECH
Method for reducing atomic energy level transition dynamic detection frequency range of atomic clock
ActiveCN103152040ANarrow down the frequency rangeHigh precisionPulse automatic controlMicrowaveLoop closing
The invention relates to the technical field of atomic energy level transition detection, and discloses a method for reducing an atomic energy level transition dynamic detection frequency range of an atomic clock. The method comprises the steps that deviation correcting voltage is sent to a signal generator, reference voltage is sent to a voltage control crystal oscillator, the signal generator outputs a signal to an integrated module of the atomic clock, the voltage control crystal oscillator outputs a signal to a microwave multiplying mixing module of the atomic clock, and atomic clock general loop closing working is conducted. According to the method for reducing the atomic energy level transition dynamic detection frequency range of the atomic clock, the atomic energy level transition dynamic detection frequency range of the atomic clock is reduced, and therefore accuracy of atomic energy level transition dynamic detection of the whole atomic clock is improved.
Owner:JIANGHAN UNIVERSITY
Envelope detector and related method
The invention relates to an envelope detector and a related method. Silencing detection is performed in a pair of differential signals. The method comprises the following steps of: in a voltage division circuit, providing an instant reference signal according to the total of the differential signals; and comparing the instant reference signal with two comparison signals related to the differential signal to generate a silencing detection signal.
Owner:MEDIATEK INC
High-speed rail running speed estimation method utilizing amplitude spectrum autocorrelation
ActiveCN110514861AGood for estimating speedReduce computationLinear/angular speed measurementSeismic signal processingEstimation methodsPeak value
The invention discloses a high-speed rail running speed estimation method utilizing amplitude spectrum autocorrelation. The method comprises the following steps that: signals excited when a high-speedrail passes through are intercepted from the seismic data of a single-detector; Fourier transform is performed on the intercepted signals, so that the amplitude spectrum of the intercepted signals can be obtained; the energy spectrum cumulative function of the signals intercepted in the previous step is calculated, and an energy frequency interval is determined; the autocorrelation function of the amplitude spectrum of the signals is calculated; a maximum peak value, a second peak value and frequencies corresponding to the maximum peak value and the second peak value are searched in the autocorrelation function, so that a frequency interval between the maximum peak value and the second peak value can be obtained; and the estimation of the running speed of the high-speed train is obtainedbased on the frequency interval between the maximum peak value and the second peak value and the length of each carriage of the high-speed train.
Owner:XI AN JIAOTONG UNIV
Method for increasing battery lifetime in a hearing device
InactiveCN106488372ANarrow down the frequency rangePower managementHearing device energy consumption reductionAudio power amplifierControl signal
The disclosure relates to a method for extending the battery lifetime in a hearing device, and to a hearing device with means for extending the battery lifetime of the hearing device. The hearing device comprise an amplifier providing an output signal and a controllable maximum power output limiter configured to limit the output signal from the amplifier when the output signal form the amplifier exceeds a predefined threshold: the hearing device further comprise a speech detector providing a control signal to the controllable maximum power output limiter, where the speech detector is further provided with an input terminal for receiving an input signal, such as the signal provided by a microphone. The controllable maximum power output limiter is further configured to reduce the maximum power output of the amplifier only when the speech detector does not detect the presence of a speech signal in the input signal received by the speech detector.
Owner:OTICON
Ladder filter
A ladder filter includes a series arm resonator arranged on a series arm connecting an input terminal and an output terminal to each other, and at least one parallel arm resonator. The series arm resonator and the at least one parallel arm resonator are resonators each including a resonant point and an anti-resonant point. The series arm resonator includes first and second series arm resonators connected in parallel with each other. For a resonant frequency fr1 and an anti-resonant frequency fa1 of the first series arm resonator, and for a resonant frequency fr2 and an anti-resonant frequency fa2 of the second series arm resonator, resonant frequency difference Δfr=|fr1−fr2|>|fa2−fr1|.
Owner:MURATA MFG CO LTD
Low-frequency sound absorption covering layer containing cylindrical scatterers with parameters changing in gradient mode
PendingCN113808563AGood underwater low-frequency sound absorptionSimple structureSound producing devicesRubber layered productsFrequency bandSiloxane
The invention relates to a low-frequency sound absorption covering layer containing cylindrical scatterers with parameters changing in a gradient mode. The low-frequency sound absorption covering layer comprises a sealing layer, a sound absorption layer and a base layer, wherein the sound absorption layer is formed by periodically arranging a plurality of identical cuboid units, a sealing layer is attached to the front surface of the sound absorption layer to guarantee water tightness, and the base layer is attached to the lower surface of the sound absorption layer to simulate a shell of an underwater structure. Three cylindrical scatterers are arranged in each unit of the sound absorption layer from top to bottom. Each cylindrical scatterer is formed by wrapping the side face of a cylindrical cavity with two layers of elastic rubber having the same thickness and different moduli. The sealing layer and the sound absorption layer are made of polydimethylsiloxane (PDMS) silicone rubber, and the base layer is made of a steel material. The problem that the low-frequency sound absorption performance is poor due to the fact that a single material is adopted is solved, the moduli and the thicknesses of coating layers in the cylindrical scatterers are designed to be in gradient change, so the frequency range of a sound absorption frequency band can be effectively reduced, and a sound absorption coefficient is improved. The covering layer is high in designability and suitable for being applied to the aspects of low-frequency vibration reduction and noise reduction.
Owner:HARBIN ENG UNIV
Improved high-dynamic capture method, device and equipment and storage medium
PendingCN113671547AReduce overheadNarrow down the frequency rangeSatellite radio beaconingHigh level techniquesTelecommunicationsRelative motion
The invention provides an improved high-dynamic capture method, device and equipment and a storage medium. The method comprises the steps of employing an initial frequency step length to search a preset initial Doppler search range through a preset method, enabling a searched first satellite to serve as a search center according to the Doppler frequency obtained by the first satellite, according to a frequency shift range generated by the Doppler effect between the satellite and a receiver when the receiver is in a static state, obtaining a target Doppler search range, performing frequency interval division according to a preset frequency step length, and searching each frequency interval to capture satellite signals. According to the scheme, the relative movement of satellites is kept unchanged, and the frequency search range can be reset, so that the frequency range needing to be searched can be narrowed, the search times are reduced, the time for capturing the satellite is shortened, and the hardware resource overhead is also greatly reduced.
Owner:CHONGQING GOD ARROW INERTIAL TECH
Radio frequency matching circuit, and method for debugging radio frequency matching circuit
InactiveCN105391457AReduce convergenceFast convergenceTransmitters monitoringReceivers monitoringSmith chartRadio frequency
The invention provides a radio frequency matching circuit and a method for debugging the radio frequency matching circuit. The radio frequency matching circuit includes more than two sub radio frequency matching circuits, one end of each sub radio frequency matching circuit is connected with a sub signal output end, and the other end is connected with an input end of an antenna; and a signal output by each of the sub signal output ends has a different frequency range. Thus signals output by an output end of a radio frequency converter are output through more than two sub signal output ends according to difference of the frequency ranges, then impedance in the corresponding frequency range is debugged through the sub radio frequency matching circuit connected with the sub signal output end, so that a radio frequency engineer can perform matching debugging in a relatively small frequency range, the debugging difficulty is lowered, the degree of convergence of a Smith chart is improved, the reflection power is reduced, and a debugging effect is improved, thereby improving the radio frequency performance of a mobile terminal.
Owner:PHICOMM (SHANGHAI) CO LTD
Low power consumption radio frequency front-end integrated circuit oriented to NB_loT
ActiveCN108183718ASimple structureHighly integratedTransmissionIntermediate frequencyFrequency mixer
The invention discloses a low power consumption radio frequency front-end integrated circuit oriented to NB_loT. The circuit comprises a low noise amplifier, a frequency mixer, an intermediate frequency filter and an intermediate frequency amplifier; in the existing receiver structure, superheterodyne receiver is complex in structure and large in power consumption, so that only the zero intermediate frequency structure is most direct and natural. The zero intermediate frequency structure is applied in the low frequency range of the sub1G to realize low power consumption and high integration density. And meanwhile, the influence from the DC disorder is eliminated by introducing a DC negative feedback technology for the specific DC disorder problem of the zero intermediate frequency structure.
Owner:重庆湃芯创智微电子有限公司
Frequency-characteristic-acquisition device, frequency-characteristic-acquisition method, and sound-signal-processing device
InactiveUS20070086553A1Narrow down the frequency rangeReduce the valueTwo-channel systemsSynchronising arrangementTime extensionExecution control
A frequency-characteristic-acquisition device that inputs a time-stretched-pulse signal to a system to be measured and that acquires information about a frequency characteristic of the system on the basis of a signal output from the system is provided. The frequency-characteristic-acquisition device includes a control unit which performs control so that the time-stretched-pulse signal is expanded in a time-axis direction and output to the system, and an acquisition unit that analyzes the signal output from the system and that acquires the frequency-characteristic information.
Owner:SONY CORP
Protection device for bus systems
ActiveUS7457094B2Reduce effortNarrow down the frequency rangeReliability increasing modificationsElectronic switchingSystem protectionEmbedded system
An electrical protection device for bus systems, in particular having a two-wire design, including a bus-control unit and at least one device connected to a bus, the protection device being arranged in a central location on the bus and connected thereto.
Owner:ROBERT BOSCH GMBH
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