23 results about "Phase difference" patented technology

A system for stabilizing a delay through a signal path of an integrated circuit (IC) includes an oscillator for producing a periodic first reference signal, a delay circuit for delaying the first reference signal to produce a periodic second reference signal, and a loop controller for adjusting the magnitude of the IC's power supply so as to maintain a constant phase difference between the first and second reference signals. By adjusting the power supply magnitude, the loop controller also stabilizes signal path delays through logic circuits implemented in the IC. The oscillator is formed by a logic gate implemented in the IC and a passive delay line feeding the logic gate's output back to its input. The delay of the delay circuit is programmably adjustable to allow for adjustment of the signal path delay through the IC.

An improved DDR interface uses single-ended technology and phase-shifts all output data signals and the output source clock signal so that each output signal switches at a different time so that IDDQ spikes caused by I/O switching do not accumulate. A dynamic phase adjustment circuit on the receiver compensates for the phase differences. Clock jitter and skew is reduced and the number of IDDQ pins is reduced to provide a more effective design and high density package.

Complex magnetic resonance (MR) image data, acquired from an examination subject that has at least two different spin species, are processed in a method and a device. At least one MR parameter that influences data acquired in an MR data acquisition is determined with spatial resolution. Complex image data are respectively acquired with each of multiple acquisition units in an MR data acquisition at multiple echo times, such that a phase difference between the first spin species and the second spin species is different at least two of the echo times. For multiple image points, a value of the at least one MR parameter is determined so that a function that depends on the at least one MR parameter and the corresponding image point in the complex image data satisfies an extreme condition.

An image capturing apparatus comprises an optical system, an image sensor having pixels each including a plurality of photoelectric converters capable of outputting image signals independently, a driving unit which controls driving of the image sensor, a focus detection unit, and an addition unit which adds the output image signals on a per-pixel basis. In each pixel, the photoelectric converters are divided into groups each including at least two photoelectric converters and a charge accumulation period for one group is delayed from and partially overlaps a charge accumulation period for another. The driving unit drives the image sensor so that image signals are read from the groups in turn, and the focus detection unit detects a focus state using a phase difference method based on the read image signals independently output from the photoelectric converters.

The invention discloses a method for controlling a non-radial displacement transducer of a multi-phase and single-winding bearingless motor. The control for torque and suspension of the multi-phase and single-winding bearingless motor is finished in two planes which are orthorhombic mutually; and a multi-phase inverter is utilized to simultaneously introduce two groups of currents with different phase differences to the motor, thus respectively realizing the torque drive and the rotor suspension of the motor. With respect to the multi-phase and single-winding bearingless motor with the phase number of more than or equal to 7, displacement signals are extracted from another plane different from a torque plane and a suspension plane according to the the characteristics of MDOF (multiple degree of freedom) of the multi-phase motor by utilizing the relationship between mutual inductance and eccentricity among different planes in an eccentric state, so as to research the non-displacement transducer control technology of the motors. In the method, the multi-control DOF of the multi-phase and single-winding bearingless motor is utilized to extract radial displacement information of a rotor under fundamental frequency, thus reducing the system cost, shortening the radial length of a system and improving the system reliability.

A power conversion apparatus includes a plurality of power supply circuits each including a primary side circuit, and a secondary side circuit that is magnetically coupled to the primary side circuit via a transformer. Electrical power that changes according to a phase difference between switching of the primary side circuit and switching of the secondary side circuit is input and output to and from the power supply circuit. The power conversion apparatus includes a first power supply circuit, a second power supply circuit that uses, as an input side thereof, an output side of the first power supply circuit, and a control unit that adjusts residual power obtained by subtracting input power of the second power supply circuit from output power of the first power supply circuit, by controlling a phase difference of the first power supply circuit and a phase difference of the second power supply circuit.

One aspect of the present invention relates to a driver of a vibrator including: a control section; and an alternating current signal generation section configured to generate an alternating current signal based on an output from the control section, and to apply the alternating current signal to the vibrator, wherein the control section is configured to lower a frequency of the alternating current signal, and to change, after the frequency change, at least one of a voltage ratio and a phase difference of the alternating current signal such that the ellipse ratio of the elliptical motion changes from a first ellipse ratio to a second ellipse ratio, the second ellipse ratio has a larger ratio of a component in a moving direction in the elliptical motion to a component in a direction perpendicular to the moving direction in the elliptical motion than the first ellipse ratio.

The present invention relates to a polarizing plate and an image display device having the same. More specifically, the present invention relates to a polarizing plate and an image display device having the same, the polarizing plate comprising: a polarizer layer; an adhesive layer formed on at least one surface of the polarizer layer; and a phase difference film including a structure in which a liquid crystal layer, an alignment layer, and a substrate make contact in regular sequence, and the liquid crystal makes contact with the adhesive layer, wherein the alignment layer is formed by a composition for forming the alignment layer, which includes an adhesion-reinforcing agent including an isocyanate group and a (meth)acrylate group at an end portion thereof so as to form bonds with a reactive group of the surface of the substrate and a reactive group in the liquid crystal compound of the liquid crystal layer, respectively, thereby simplifying a manufacturing process, achieving excellent interlayer adhesion, and enabling the implementation of a thin polarizing plate.

The purpose of the present invention is to provide a phase difference film which is not prone to color loss and color shift even in environments with harsh temperature conditions and humidity conditions, which can be manufactured by the melt film formation method. This phase difference film fulfills the relations of expressions (A) and (B) below. Expression (A): 0.7 < R1(450)/R1(550) < 1; Expression (B): |R2(450)/R2(550) - R1(450)/R1(550)| < 0.020

The invention particularly relates to an inter-channel phase difference and amplitude difference high-precision measurement method comprising the following steps that (A) supposing that multichannel input signals are r(k); (B) digital down-conversion processing is performed on each channel and the IQ data r<ddc>(k) after down-conversion are obtained by the decimation filter; (C) any one channel r(m) is selected to act as the reference channel and conjugating of r<ddc>(m) is performed so as to obtain r<*><ddc>(m); (D) the down-conversion data of other channels and the down-conversion conjugatedata of the reference channel are multiplied so as to obtain the processed complex signal r<mul>(k)=r<ddc>(k).r<*><ddc>(m); and (F) the phase difference phi<delta>(k) and the amplitude difference A<deltah>(k) between the kth channel and the mth channel are calculated according to the obtained complex signal: mean filtering is performed on the DC component after conjugate multiplying and there is no spectrum leakage so that the calculation precision is higher than that of conventional FFT; and mean filtering is realized by using the first-order CIC filter so that the calculation amount is muchlower in comparison with that of the conventional FFT method and the advantage is more obvious especially in case of high number of channels.

The invention relates to an adjusting mechanism for adjusting circumferential phase differences of a submitting roller and an outlet roller, which comprises a left-handed rotation gear and a right-handed rotation gear which are arranged on the submitting roller, and an adjusting device arranged on one side of the submitting roller. The adjusting mechanism is characterized in that the left-handed rotation gear is fixedly arranged on the submitting roller by adopting flat keys, the right-handed rotation gear is arranged on the submitting roller through a bearing, and the left-handed rotation gear and the right-handed rotation gear form a submitting double helical spur gear; the adjusting device comprises a fixed shaft, a left adjusting helical gear, a right adjusting helical gear, a slipping shaft, a screw shaft and a turntable; one end of the fixed shaft is fixed on a wallboard; the slipping shaft is sleeved on the fixed shaft; the right adjusting helical gear is arranged on the slipping shaft and can rotate freely; the left adjusting helical gear is connected and fixed with the right adjusting helical gear to form an adjusting double helical spur gear; the adjusting double helical spur gear is meshed with the submitting double helical spur gear; the screw shaft and the slipping shaft are in driving motion through threaded connection; and the outer end of the screw shaft is provided with the turntable. The adjusting mechanism has a simple and skillful structure, is convenient and quick to adjust, is intuitive and reliable, and has high adjustment accuracy.

The invention discloses an all-optical sampler, comprising a continuous laser which is used for generating continuous signal light; an optical modulator which is driven by a radio frequency signal and is used for modulating an analog radio frequency signal through combination with the signal light, thereby generating continuous analog signal light; a polarization controller which is used for controlling a polarization state of the analog signal light; a first coupler which is used for allocating the low-power analog signal light into two ways of light according to a proportion; a Mach-Zehnder interferometer, wherein a first interference arm and a second interference arm of the Mach-Zehnder interferometer are used for receiving the two ways of analog signal light allocated by the first coupler; and a second coupler which is used for receiving the analog signal light output by the Mach-Zehnder inter-ferometer, coupling the analog signal light and then outputting sample signal light. According to the all-optical sampler, through utilization of cross-phase modulation effect of pump light for the analog signal light, the phase difference of the signals on the two interference arms is changed, so transmittance of the signals is changed; when the pump light exists, the signals are transmitted; and when the pump light does not exist, the signal transmittance is 0, thereby sampling the signals.

A method and an apparatus are disclosed to detect faults in a rotary machine having a rotor and at least two stator windings. The method comprises generating an input signal and applying the input signal to stator windings while the rotor is locked at a rotor position, measuring output signals from the stator windings and processing all the output signals by Fourier transform to obtain frequency responses of the stator windings, forming derived quantities from all the frequency responses so that the derived quantities are independent of the rotor position, comparing the derived quantities with corresponding reference quantities, determining that there is a fault in the rotary machine if a magnitude or phase difference between the derived quantities and the corresponding reference quantities exceeds a threshold number. The apparatus is designed to test a rotary machine using the inventive method.

The invention discloses an RF (radio frequency)-SQUID (superconducting quantum interference device) application-based high-stability frequency automatic controller. The controller comprises a frequency tracking unit and a phase compensation unit; the frequency tracking unit is electrically connected with the phase compensation unit; the frequency tracking unit is used for capturing and tracking the resonant frequency of an LC circuit in an RF-SQUID application; and the phase compensation unit is used for compensating phase difference caused by different cable lengths in the RF-SQUID application. According to the RF (radio frequency)-SQUID (superconducting quantum interference device) application-based high-stability frequency automatic controller of the invention, automatic frequency control is used to replace conventional open-loop control, and the automatic frequency control has the characteristic of stable output frequency and is not affected by external environments; and the phasecompensation circuit is additionally adopted; and therefore, the high-stability frequency automatic controller has the advantages of wider application environment range and higher test precision. Theadvantages of the high-stability frequency automatic controller can be applied to geomagnetic exploration, physical principle verification, non-destructive detection, and low-frequency telecommunication and other fields.

A digital volume controller and a control method thereof are provided. The digital volume controller includes an adjuster, a D flip-flop and a processor. The adjuster outputs a first signal and a second signal according to a rolling direction of the adjuster. There is a phase difference between the first signal and the second signal. The D flip-flop includes a clock terminal coupled to the first signal, a D terminal coupled to the second terminal and a Q terminal coupled to a third signal. When the first signal generates an enabling trigger, the processor generates a volume control signal according to a logic level of the third signal.

The invention discloses a positioning antenna, a positioning antenna assembly, a road side unit, and a DSRC application system. The positioning antenna comprises at least three receiving antennas, wherein equivalent phase centers of the receiving antennas are all on a same straight line, distances exist between the equivalent phase centers of the receiving antennas, at least one of the distances d12 is less than lambda, and at least one of the distances d13 is greater than N lambda. According to the positioning antenna of the invention, microwave signals from an OBU can be received by adopting at least receiving antennas which are arranged according to a certain distance, so a RSU can be conveniently used to calculate an azimuth angle corresponding to the microwave signals transmitted by the OBU through a phase difference method after the microwave signals are processed correspondingly by the RSU, and accurate positioning information of the OBU can be calculated according to the azimuth angle to determine whether the OBU is located in an antenna coverage region of the RSU, so that adjacent channel interference and vehicle following interference problems can be effectively solved.