153results about How to "Small phase difference" patented technology

An apparatus for upmixing a downmix audio signal describing one or more downmix audio channels into an upmixed audio signal describing a plurality of upmixed audio channels includes an upmixer and a parameter determinator. The upmixer is configured to apply temporally variable upmix parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal, wherein the temporally variable upmix parameters include temporally variable smoothened phase values. The parameter determinator is configured to obtain one or more temporally smoothened upmix parameters for usage by the upmixer on the basis of a quantized upmix parameter input information. The parameter determinator is configured to combine a scaled version of a previous smoothened phase value with a scaled version of an input phase information using a phase change limitation algorithm, to determine a current smoothened phase value on the basis of the previous smoothened phase value and the phase input information.

The invention provides a feed source locating and focus offset device for compact range measurement. The device is used for precise location and focus offset motion of a feed horn in an electromagnetic measurement process of a compact range. The device mainly comprises left and right transverse movement along the X axis, front and back longitudinal movement along the Y axis, rotation and translation around the Z axis and pitching movement around the phase center of a feed source. Accurate locating and focus offset of the feed source are realized through movement of five freedom degrees, and focus offset measurement is completed. By means of servo control, polarization rotation and uniform rotation at a certain rotation speed of the feed horn can be realized, and RCS (radar cross-section) measurement or antenna measurement is completed. The device comprises an X-axial moving unit, a Y-axial compensation unit, a Z-axial rotating and height adjusting unit, an offset arm, a feed source pitching unit and a feed source polarization unit. Different from a fixed feed source locating device, the device can not only be used for precise location of the feed source during measurement of the compact range in a traditional manner, but also be used for measurement of new demand ways such as focus offset and the like; the device has the advantages of high measurement efficiency, high locating precision and simple and reliable control process.

An optical film satisfies the following formulae (1) to (6):150≦Re(550)≦400   (1)−100≦Rth(550)≦100   (2)0.1<Re(450) / Re(550)<0.95   (3)1.03<Re(650) / Re(550)<1.93   (4)0.4<(Re(450) / Rth(450)) / (Re(550) / Rth(550))<0.95   (5)1.05<(Re(650) / Rth(650)) / (Re(550) / Rth(550))<1.90,   (6)wherein Re(450), Re(550) and Re(650) are an in-plane retardation value (unit: nm) measured with light at a wavelength of 450 nm, 550 nm and 650 nm, respectively, and Rth(450), Rth(550) and Rth(650) are a retardation value in a thickness-direction (unit: nm) measured with light at a wavelength of 450 nm, 550 nm and 650 nm, respectively.

The present invention provides systems and methods for implementing narrowly spaced correlators to mitigate multipath error, and systems and methods for adaptively changing the correlator spacing for varying multipath conditions. In an embodiment, two sets of correlators with the same code frequency but different code phases are used to implement an adjustable correlator spacing. The correlator spacing is determined by the code phase difference between the two sets of correlators, which can be adjusted, e.g., by adjusting the code phase values of Numerically Controlled Oscillators (NCOs). An advantage of embodiments of the present invention is that they can achieve much narrower correlator spacings than conventional techniques, e.g., by making the code phase difference between the two sets of correlators very small. Further, the correlator spacing can be adjusted for varying multipath conditions, whereas the correlator spacing in conventional techniques is fixed.

The invention discloses a high-accuracy complementary metal oxide semiconductor (CMOS) single-end-input to differential-output converter. As a figure (5) shows, the high-accuracy CMOS single-end-input to differential-output converter consists of a load resistor R1, a bias resistor RB1, metal oxide semiconductor (MOS) transistors M1 to M8, and a coupling resistor RF. The high-accuracy CMOS single-end-input to differential-output converter is characterized in that: a common mode output signal is compared with a reference common mode bias voltage; and if the common mode output signal is not equal to a reference value, a feedback loop can be generated for adjusting a bias current M3 of a differential amplifier to make the common mode output signal equal to the reference value, so that the common mode output signal can be effectively controlled.

A film which is a single polymer film and has a smaller phase difference as the wavelength becomes shorter. This film is made from an olefin-based polymer which has an alicyclic group in the side chain, such as hydrogenated polystyrene, the amount of the alicyclic group in the side chain being 60 to 90 wt % based on the whole polymer, and satisfies the following expression: <?in-line-formulae description="In-line Formulae" end="lead"?>R(450) / R(550)<1<?in-line-formulae description="In-line Formulae" end="tail"?> wherein R(450) and R(550) are phase differences on the film plane at a wavelength of 450 nm and a wavelength of 550 nm, respectively.

The invention discloses a miniature LTCC 1.8-GHz power divider with a built-in resistor. The miniature LTCC 1.8-GHz power divider with the built-in resistor comprises a surface-mounted 50-ohm impedance input port, an input inductor, a first spiral inductor, a second spiral inductor, a ground capacitor, a shunt capacitor, two vertical ports, two first parallel ports, two second parallel ports, the built-in tantalum absorption resistor, a first output inductor, a second output inductor, a first surface-mounted 50-ohm impedance output port, a second surface-mounted 50-ohm impedance output port and a ground plate. The miniature LTCC 1.8-GHz power divider is made of LTCC materials in a three-dimensional integrated mode and has the advantages that use is easy and convenient, the size is small, the isolation degree is high, the insertion loss is low, the phase difference between the two output ports is small, the reliability is high, the electrical performance and the temperature stability are good, the cost is low, and mass production can be achieved.

A generally diamond-shaped detection electrode is formed in the approximate center of the piezoelectric element. The strain resulting from the bending secondary vibration mode in the vicinity of the detection electrode is minimized because the detection electrode is formed in such a manner as to include a vibrational node of the longitudinal primary vibrational mode and a vibrational node of the bending secondary vibrational mode. As a result when the phase difference between the drive signal and the detection signal is detected, the effect of vibration in the bending secondary vibration mode on the detected phase difference can be suppressed and a single drive frequency can be determined with respect to a prescribed phase difference. Thus, the drive performance of the vibrating body with respect to a driven body (i.e., a body driven by the vibrating body) can be reliably improved because, by controlling the drive frequency such that the phase difference equals a prescribed value, the vibrating body can be made to vibrate at a desired frequency and vibrate in such a manner that the desired vibration components are achieved in each vibration mode.

The invention provides a multidigit digitally controlled attenuator with low additional phase shift, phases of an attenuation state and a reference state of an attenuator are tuned by setting serially connected tuning capacitors and resistors connected with the tuning capacitors, in combination with specific circuit structure of a pi-shaped structure, T-shaped structure and a bridge T-shaped structure, in case of maintaining reasonability of parameters such as flatness and attenuation accuracy, so that a phase difference of the attenuation state and the reference state is reduced as much as possible, and thus an additional phase shift index of the attenuator is effectively improved, and the attenuator is ingenious in structural design, less in used elements, small in size after molding, accordant with actual requirements, and very high in use value and promotional value.

The invention provides an acoustic structure with a passive vibrating diaphragm unit. The acoustic structure comprises a loudspeaker unit, the passive vibrating diaphragm unit and a radiant tube, wherein the passive vibrating diaphragm unit is located at the back of a sound cone of the loudspeaker unit, the radiant tube is arranged on the side face of the loudspeaker unit, one end, exposed in air, of the radiant tube is located on the periphery of the sound cone of the loudspeaker unit and is consistent with the loudspeaker unit in orientation, the passive vibrating diaphragm unit is driven by the loudspeaker unit to vibrate, acoustic waves generated through vibration of the passive vibrating diaphragm unit are emitted through the radiant tube and a radiation port and reach the approximately same sound production point with the loudspeaker unit, the sound production effect of gamut approximate point sound sources is achieved, the phase difference of sound production of the sound cone of the loudspeaker unit and sound production of the passive vibrating diaphragm unit is reduced, and the sound positioning aspect is greatly enhanced. The invention further provides a compact type voice frequency radiation module with the structural design and a loudspeaker box with the structural design.

The invention discloses an image fusion system based on Cameralink and an image fusion method based on Cameralink. The image fusion system comprises two paths of Cameralink vudei receiving systems, an FPGA, a memory, a multinucleated DSP and a display, wherein the two paths of Cameralink vudei receiving systems are respectively connected with the FPGA, and the FPGA is respectively connected with the memory, the multinucleated DSP and the display. According to the image fusion system, fused two-path video inputs are respectively Cameralink, transmission band width can reach above Gpbs, the image fusion system has a substantial advantage in high-resolution high-frame frequency image processing; a data TTL signal generated when a Cameralink camera signal passes through a video receiving system decoding difference module has simple time sequence, the two videos have quite small phase difference at one time, two paths of images are fused for realization in the FPGA.

The present invention can suppress the reduction of the phase difference between the generating torque and the braking torque, which causes vibration and noise, and can reduce torque ripple. A single-phase brushless motor is provided with a stator (14) in which a coil (27) is wound on a salient pole tooth (26) of a stator core (23), and there is a gap in the radial direction between the stator core (14) And it has a rotor (15) with ring-shaped permanent magnets (21) arranged oppositely. Make the distance from the center of the stator core (23) to the tooth end surface (30) of the salient pole tooth (26) differ between the two ends of the rotation direction of the salient pole tooth (26) so that the size of the gap is between the salient pole teeth ( 26) There is a gap between both ends of the rotation direction. The relationship between the minimum gap length (d1) and the maximum gap length (d2) between both ends of the salient pole teeth (26) in the direction of rotation is from d1:d2=1:2 to d1:d2=1:3.

The difference between the phase difference generated by a fat layer and a muscle layer is used to determine the subcutaneous fat thickness Lf of a portion of a human body with which measurement electrodes are in contact based on the phase difference between a current that flows in a current pathway from one of a first current supply electrode (12a) and a second current supply electrode (12b) via the human body to the other electrode and the voltage measured by the first voltage measurer 30.

The invention discloses a PFC control circuit which is applied to a PFC circuit with a filter capacitor. On the basis of an existing PFC control circuit, a sampling circuit and a differential processing circuit are added on the PFC circuit. The sampling circuit generates a first sampling signal positively related to a current signal of the filter capacitor, the differential processing circuit conducts differential processing on the first sampling signal to obtain a compensating signal, and the compensating signal is input into a comparison circuit of the PFC control circuit. Compared with the prior art, according to the PFC control circuit, input currents are lower in the period that the compensating signal is not zero, and the input currents are higher in the period that the compensating signal is zero, therefore, peak points of the input currents are made to move backwards, the phase difference between input voltage and the input currents is reduced, namely the current signal can follow changes of a voltage signal in a more matched mode, and the power factor of the PFC circuit is increased. The invention further discloses the PFC circuit comprising the PFC control circuit.

The invention provides an iron cobalt nickel based anti-DC nanocrystalline alloy material and a preparation method thereof. Based on an existing traditional iron-based nanocrystalline soft magnetic alloy formula (Fe73.5Cu1Nb3Si13.5B9), a certain proportion of nickel and cobalt elements are added to overcome nonlinear characteristics caused by excessive initial permeability of amorphous nanocrystalline material, and the novel iron-based amorphous nanocrystalline material has stable magnetic properties and the initial permeability of 1800-6000, and the molecular formula of Fe96-x-y-zCoxNiyCu1Nb3Si0.55zB0.45z, wherein x+y is more than 9 and less than 30, and z is more than 18 and less than or equal to 20. The preparation method is based on a single-roll ultra-cold method, and comprises the steps of mother alloy ingot casting, re-melting, tape making, and strip winding. The iron cobalt nickel based anti-DC nanocrystalline alloy material can satisfy the requirements on various performance indexes including high saturation magnetic induction density, high linearity, low loss and low remanence of soft magnetic material of a current transformer.

The invention discloses a polyamic solution composition and a polyimide film. The present invention pertains to a polyimide film comprising mainly a polyimide obtained by polymerizing a tetracarboxylic acid component and a diamine component, wherein the tetracarboxylic acid component consists of one or more phthalic anhydride structure-free tetracarboxylic dianhydrides (a1) in which at least one of the bonds connecting the two cyclic acid anhydride structures in the molecule is a freely rotatable bond, and one or more tetracarboxylic dianhydrides (a2) with no freely rotatable bonds in the molecule having an alicyclic structure and the two cyclic acid anhydride structures sharing at least one carbon-carbon bond with an alicyclic structure, and the diamine component includes 5-50 mol% of oneor more diamines having a 9,9-diphenylfluorene structure.

The present invention discloses a dynamically tuning device and a tuning method for the sending terminal of a wireless electric energy transmission device, and relates to the technical field of wireless electric energy transmission. The primary side of the dynamically tuning device is provided with a phase detection device PD, a BUCK circuit, a control unit CU and a rectifier bridge. According to the detected phase difference state, the resonant state is judged. Meanwhile, the real-time tuning is realized through adjusting the equivalent output resistance of the BUCK circuit. As a result, the primary side can be maintained to run at a minimum voltage phase difference and a minimum current phase difference. That means, a primary side circuit is closer to the completely resonant state, so that the active power of the sending terminal is improved. Furthermore, the transmission power and the transmission efficiency of the wireless electric energy transmission device are improved.

The present invention provides a resin composition for an optical material and a method for production thereof. The resin composition for the optical material of the present invention comprises an acrylic acid series resin and a makrolon resin, the above makrolon resin possesses 1000-1500 viscosity average molecular weigh, and the content of the above makrolon resin, relative to the 100 parts by weight of the above acrylic acid series resin is 2 parts-10 parts.

Disclosed is a laminate optical body with which a liquid crystal display device having excellent manufacturing efficiency, extremely little axial misalignment, and little display nonuniformity can be obtained. This laminate optical body is equipped with: an elongated polarizing film having an absorption axis in the short-side direction and containing a base material layer and a hydrophilic polymer layer to which a dichroic material is absorbed; and an elongated phase retardation film having a slow axis in the lengthwise direction. The polarizing film is a laminate body containing a base material layer and a hydrophilic polymer layer to which a dichroic material is absorbed. This laminate optical body is elongated. The thickness of the hydrophilic polymer layer preferably is 1-10 [mu]m.

The invention provides an optical film, a polarizer protective film, a polarizing plate and an image display device. The optical film in the invention comprises a (methyl) acrylic acid polymer (c) with an N- substitute maleimide unit (a) and a (methyl) acrylic acid ester unit (b) as the structural unit. The N- substitute maleimide unit (a) is a structural unit applying effect of positive fixing double refraction upon the (methyl) acrylic acid polymer (c). The (methyl) acrylic acid ester unit (b) is a structural unit applying effect of negative fixing double refraction upon the (methyl) acrylic acid polymer (c). The optical film in the invention displays an inplane phase difference Re in the range of 0nm to 10nm, and a thickness direction phase Rth in the range of -10nm to 10nm with respective to light with wavelength of 589nm. The optical film in the invention is a bidirectional stretching film. Although the optical film is a bidirectional stretching film, the displayed phase direction is small and high heat resistance is provided.

A power saving operation control method and device for a phase comparator unit are provided. The control device includes: a reference signal frequency dividing unit which divides the frequency of a reference signal to generate a reference frequency divided signal; a comparison signal frequency unit which divides an input signal to generate a comparison frequency divided signal; a phase comparator which compares the phases of the reference frequency divided signal and the comparison frequency divided signal; a canceling signal generator which generates a power saving state canceling signal in accordance with the reference frequency divided signal and the comparison frequency divided signal; a first initializing signal generator which generates a first initializing signal for initializing the reference signal frequency dividing unit in accordance with the power saving state canceling signal; and a second initializing signal generator which generates a second initializing signal for initializing the comparison signal frequency dividing unit in accordance with the power saving state canceling signal.

The invention discloses an optical fiber vibration sensing system based on a dual modulation Mach-Zehnder interferometer. The system comprises a Mach-Zehnder interferometer, a host computer and a slave computer arranged at both ends of the interferometer, two coupler, four optical circulators, two phase modulators and two sensing optical fibers. The optical fiber vibration sensing system based on the dual modulation Mach-Zehnder interferometer loads modulating signals sent by the host computer and the slave computer at both ends of the optical fiber interferometer to the phase modulator of the interferometer to realize dual modulation, after modulated signals are coherent, signal sampling and demodulation are realized at an opposite end of a light source, the modulating signals are delayed as demodulating signals in a process of realizing demodulation, so that time delay that the modulated signals reaches a demodulating module through transmission and circuit relay is counteracted, thereby solving the disadvantage that since phase difference between the modulating and demodulating signals is too large, a demodulating result is severely distorted, and further enabling the phase difference between the modulating signals and the demodulating signals of the host computer and the slave computer ends to be greatly reduced, thereby achieving relatively high positioning precision.

While it is necessary for a package for housing electronic components to be furnished with numerous wire conductors, phase differences of signals, caused by differences in the signal transmission distance among wire conductors, is a problem. This package for housing electronic components has: a substrate having a dielectric area and an electronic component mounting area; a frame furnished to enclose the dielectric area and the mounting area; and a plurality of wire conductors arranged in the dielectric area of the substrate. The plurality of wire conductors have first wire conductors arranged in the dielectric area from directly below the frame, and second wire conductors of longer signal transmission distance than the first wire conductors. The frame, which comprises a dielectric, is provided with a protruding part protruding from the inside peripheral surface, and covering the first wire conductors at least in part.

A method for correcting the phase difference between two input signals of a phase-locked loop may include a charge pump connected to a filter. Prior to the occurrence of the first of the two input signals, a calibration phase may be carried out in which the input of the filter is disconnected from the output of the charge pump, the output voltage from the charge pump is equalized, to within a given error, with the input voltage of the filter, the amplitudes of the opposing currents flowing in the charge pump being equalized. Then, during the two respective occurrences of the two input signals, the input of the filter is reconnected to the output of the charge pump, and two phase-shifted signals that are delayed with respect to the input signals are respectively generated, in response to which the two opposing currents are, respectively and successively, interrupted, before the calibration phase is recommenced.

The invention discloses a visible light heat reflection temperature measuring device. The device comprises an illumination light path used for providing an illumination pulse signal for a to-be-measured sample, a sample excitation module used for applying excitation pulse signals to the to-be-measured sample, an imaging module used for capturing illumination pulse reflection signals reflected by the to-be-measured sample and acquiring a thermal process image of the to-be-measured sample under the excitation of the excitation pulse signals, wherein the imaging module captures the illumination pulse reflection signals corresponding to the same phases of the excitation pulse signals within the same exposure period; and the phases of the excitation pulse signals corresponding to the illumination pulse reflection signals captured by the imaging module in different exposure periods are different. The thermal process image of a semiconductor device can be realized through the visible light thermal reflection temperature measuring device; and the preset duration is shortened, and the preset phase difference between the illumination pulse signals and the excitation pulse signals is reduced, so that the time precision of the thermal imaging process is improved, and the time resolution is greatly improved.

The present invention provides systems and methods for implementing narrowly spaced correlators to mitigate multipath error, and systems and methods for adaptively changing the correlator spacing for varying multipath conditions. In an embodiment, two sets of correlators with the same code frequency but different code phases are used to implement an adjustable correlator spacing. The correlator spacing is determined by the code phase difference between the two sets of correlators, which can be adjusted, e.g., by adjusting the code phase values of Numerically Controlled Oscillators (NCOs). An advantage of embodiments of the present invention is that they can achieve much narrower correlator spacings than conventional techniques, e.g., by making the code phase difference between the two sets of correlators very small. Further, the correlator spacing can be adjusted for varying multipath conditions, whereas the correlator spacing in conventional techniques is fixed.

The invention discloses an AC (Alternating Current)-LED (Light-emitting Diode) fluorescent lamp which comprises a power supply drive circuit, an AC-LED array and a kit, wherein the kit comprises an aluminium substrate, a radiator and a PC (Poly Carbonate) cover; the input end of the power supply drive circuit is connected with an input power supply; the output end of the power supply drive circuit is connected with the AC-LED array; the AC-LED array comprises at least two LED chips; the LED chips are averagely divided into at least two groups; the LED chips in each group are sequentially connected end to end in series; then all the groups are connected in parallel in the same direction; the LED chips are fixed on the aluminium substrate; the aluminium substrate is fixed on the radiator; and the PC cover is fixed on the radiator and arranged outside the AC-LED array in a covering manner. With the adoption of the AC-LED fluorescent lamp, the cost of an LED illumination product can be lowered, and the service life can be prolonged.