|| List of recent Phase Shift-related patents
|Simulator for simulating the operation of a fiber optic gyroscope|
A method includes simulating operation of a fiber optic gyroscope during a digital simulation. The simulation includes performing an iterative loop that includes simulating an intensity of light from a fiber coil of the fiber optic gyroscope and simulating operation of one or more control loops within the fiber optic gyroscope using the simulated intensity of the light.
|Tunable dbr laser and a operating a tunable dbr laser|
A tunable dbr laser including: an amplifier section, a part-reflecting optical output, a connection section connected to the amplifier section, and at least two wavelength-selective reflectors optically coupled to the amplifier section via the connection section. The connection section includes at least one mmi coupler and several waveguides, so that different optical paths lead from the amplifier section to the wavelength-selective reflectors and each of the different optical paths leads through the at least one mmi coupler and through one of the waveguides.
Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.
|Resonant power converters using impedance control networks and related techniques|
An impedance control resonant power converter (converter) operated at a fixed switching frequency includes an impedance control network (icn) coupled between two or more inverters operated at a fixed duty ratio with a phase shift between them and one or more rectifiers. The phase shift is used to control output power or compensate for variations in input or output voltage.
Massachusetts Institute Of Technology
|Capacitive sensing apparatus and methods|
One or more waveform generators impose an input waveform across touch sensor components. Phase shift detection logic measures a phase shift between the input waveform and an output waveform component associated with each waveform generator appearing across a touch sensor component.
Texas Instruments Deutschland Gmbh
|Aperiodic phased array antenna with single bit phase shifters|
An antenna array can include multiple radiating cells, each comprising a radiating element and a phase shifter. Further, each radiating element can comprise a first radiating element port and a second radiating element port.
|Methods and systems for using a differential light drive in a physiological monitor|
A physiological monitoring system may use a differential light drive to illuminate one or more light sources. A differential light drive may include applying two signals, one to each terminal of a light emitting diode or other light source, such that the illumination of the light source is controlled by the difference between the two light drive signals.
|Co2 laser with rapid power control|
Subject matter of the invention is a co2 laser that permits a rapid power modulation, particularly a highly efficient q-switching. The key concept is the sub-division of the resonator into a high-power branch, containing inter alia the active medium (1), and a low-power feedback branch (14), in which the power-sensitive beam-shaping elements, particularly the modulators, are arranged.
Iai Industrial Systems B.v.
|Four-direction switch device|
In a four-direction switch device, an outer peripheral surface of a disc-shaped switch knob is provided with first to fourth pivot projections arranged in phase with first to fourth switch operation parts and first to fourth movable stoppers arranged with a phase shift by 45° from the projections, respectively, and a switch case is provided with first to fourth fixed stoppers facing lower surfaces of the movable stoppers, respectively. If the knob is pushed at a switch dead part, the knob swings about a straight line connecting a pair of the pivot projections located on an opposite side of the switch dead part, but the movable stopper and the fixed stopper both located below the pushed switch dead part come into contact with each other, thereby avoiding actuation of any switch..
Honda Motor Co., Ltd.
|Device for the variable control of at least one valve, for example for a reciprocating engine|
A device for controlling at least one valve, the device comprising a body having a non-deformable cavity communicating exclusively with the outside via at least four rectilinear cylinders that are closed respectively by an opening piston (p1) actuated by an opening cam (c1), a closing piston (p2) actuated by a closing cam (c2), a shuttle piston (pa) serving to load or unload the device, and a piston (ps) that is mechanically connected to the valve. By adjusting the angular phase shift between the opening and closing cams (c1, c2), the control device of the invention makes it possible in operation to adjust the lift of the valve, the angular duration of the opening of the valve, and if necessary, to deactivate the valve completely throughout the duration of a cycle..
|Apparatus and estimating intra-channel nonlinear damage|
An apparatus and method for estimating intra-channel nonlinear damage, including: a first determining unit configured to determine a nonlinear phase shift weighting dispersion distribution function of an optical fiber transmission link according to a parameter of the optical fiber transmission link; a segmenting unit configured to segment the nonlinear phase shift weighting dispersion distribution function of the optical fiber transmission link into at least one rectangle; a calculating unit configured to respectively calculate a nonlinear perturbation coefficient of each rectangle in the at least one rectangle, and perform summation on the nonlinear perturbation coefficients of all the rectangles, so as to obtain a nonlinear perturbation coefficient of the optical fiber transmission link; and a second determining unit configured to determine intra-channel nonlinear damage of the optical fiber transmission link according to the nonlinear perturbation coefficient of the optical fiber transmission link.. .
Optical semiconductor device
An optical semiconductor device is provided as one achieving reduction of power in phase control. The optical semiconductor device has: a first optical waveguide having a plurality of segments each of which has a diffraction grating region with a diffraction grating and a space portion coupled to the diffraction grating region, having two ends interposed between the diffraction grating regions, and having a constant optical length, wherein at least one of the segments is provided with a phase shift structure; a first phase control device for adjusting a phase of light in each segment with the phase shift structure; and a second phase control device for adjusting a phase of light in each segment without the phase shift structure..
Sumitomo Electric Industries, Ltd.
Transmitter and signal transmitting method thereof
A signal transmitter and receiver are provided. The transmitter includes: a multiple input multiple output (mimo) precoder configured to, in response to a first input signal and a second input signal, generate a first transmission signal and a second transmission signal by performing mimo precoding by pre-phase shifting or pre-phase shifting/hopping the second input signal, and superposition encoding the first input signal and the pre-phase shifted or pre-phase shifted/hopped second input signal; and an orthogonal frequency division multiplexing (ofdm) modulator configured to ofdm modulate the first transmission signal and the second transmission signal..
Samsung Electronics Co., Ltd.
Simultaneous transmit and receive (str) structures immune to phase and amplitude imbalances
An echo-canceling unit for a simultaneous transmit and receive (str) system includes at least three phase shifters in which each respective phase shifter is coupled to a transmit signal to generate an output signal comprising a selected phase shift with respect to the transmit signal. A weight calculation unit generates a corresponding amplitude-weight signal for the output signal of the phase shifter.
The present disclosure proposes an input power of each unit power cell of a cascaded h-bridge inverter that is mutually insulated. To this end, the present disclosure includes a phase shift transformer configured to output a voltage of predetermined phase by receiving an ac input power having a fixed frequency, and a plurality of unit power cells serially-connected configured to output a voltage having a predetermined phase by receiving a voltage provided by the phase shift transformer, wherein the phase shift transformer is configured to include the number of phase shifts corresponding to the number of the plurality of unit power cells..
Lsis Co., Ltd.
Multi-level medium-voltage inverter
A multi-level medium-voltage inverter that receives three-phase power and outputs a three-phase voltage to a three-phase motor, includes: a plurality of unit power cells connected in series to output a single phase voltage, individual unit power cells each having a phase voltage forming a single level to configure multiple levels; and a module-type phase shift transformer configured to convert the three-phase power and applying the converted power to three unit power cells constituting one level, wherein the module-type phase shift transformer includes a plurality of modules.. .
Lsis Co., Ltd.
Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (mimo) configuration, and related components, systems, and methods
Components, systems, and methods for reducing location-based interference in distributed antenna systems operating in multiple-input, multiple-output (mimo) configuration are disclosed. Interference is defined as issues with received mimo communications signals that can cause a mimo algorithm to not be able to solve a channel matrix for mimo communications signals received by mimo receivers in client devices.
Corning Optical Communications Llc
Image processing device and method
The present disclosure relates to image processing devices and methods that can increase encoding efficiency in encoding or decoding motion vectors in cases where an input is an interlaced signal. The current pu and the reference pu to be referenced by the motion vector information about the current pu belong to top fields.
Coherence scanning interferometry using phase shifted interferometrty signals
Low-coherence scanning systems and methods for operating the same include simultaneously measuring two phase-shifted interferograms corresponding to intensity patterns produced by interfering test light reflected from a test object with reference light on respective first and second detectors, in which the test light and reference light are derived from a common source. The interferograms measured by the first detector define a first set of scanning interferometry signals, and the interferograms measured by the second detector define a second set of interferometry signals corresponding to substantially the same multiple transverse locations on the test object, in which each interferometry signal in the second set is phase-shifted relative to a corresponding interferometry signal in the first set.
Surface antenna with a single radiation element
A surface antenna with a single radiation element, which comprises (a) a power source with first and second poles; (b) a phase shifting element, inserted to the path of one of the poles of the power source in such a manner that the phase shifting device shifts the phase of a first signal propagating through said pole such that the shifted phase of the first signal will be essentially identical to the phase of a second signal propagating through the other pole. The shifted first signal is added to the second signal with essentially the same phase of second signal, whenever both poles are connected together to form a single-wire, through which the resulting added signal propagates.
Power-dividing and/or power-combining circuits with isolation
Power-dividing and/or power-combining circuits have inputs, outputs, and at least three electrical pathways, with substantially equal input and output reflection coefficients. An electronic device may be provided in each of the pathways.
U.s. Army Research Laboratory Attn: Rdrl-loc-i
A directional coupler for use in a predetermined frequency band includes a laminate body including a laminate of a plurality of insulation layers, a first terminal through a fourth terminal disposed on a surface of the laminate body, a main line connected between the first terminal and the second terminal and disposed on the insulation layer, a first sub-line connected to the third terminal, electromagnetically coupled with the main line, and disposed on the insulation layer, a second sub-line connected to the fourth terminal, electromagnetically coupled with the main line, and disposed on the second sub-line, and a phase adjusting circuit connected between the first sub-line and the second sub-line and configured to cause a phase shift on a passing signal. The main line, the first sub-line and the second sub-line do not overlap each other in a plan view from a direction of lamination..
Murata Manufacturing Co., Ltd.
System and a transformer and a phase-shift network
In accordance with an embodiment, a circuit includes a magnetic transformer having a first winding coupled between a first signal node and a second signal node, and a second winding coupled between a first reference node and a current measurement node. A phase shift network is coupled between the second node and a voltage measurement node, and the circuit is configured to indicate an impedance matching condition based on an amplitude difference and a phase difference between the voltage measurement node and the current measurement node..
Infineon Technologies Ag
Conversion circuit for converting complex analog signal into digital representation
A conversion circuit for converting a complex analog input signal having an in-phase (i) component and a quadrature-phase (q) component is disclosed. It comprises a channel-selection filter configured to filter the complex analog input signal, thereby generating a channel-filtered i and q components, and one or more processing circuits.
Telefonaktiebolaget L M Ericsson (publ)
Mach-zehnder interferometer type optical modulator
A mach-zehnder interferometer type optical modulator includes a first end facet and a reflecting portion opposing the first end facet; a single optical coupler including input and output ports, the optical coupler being disposed between the first end facet and the reflecting portion; first and second optical waveguides that are connected to the input ports of the optical coupler; third and fourth optical waveguides that are connected to the output ports of the optical coupler; and a phase shifting section disposed between the optical coupler and the reflecting portion. The phase shifting section includes a first optical waveguide structure constituting part of the third optical waveguide; a first upper electrode on the first optical waveguide structure; a second optical waveguide structure constituting part of the fourth optical waveguide; and a second upper electrode on the second optical waveguide structure..
Sumitomo Electric Industries, Ltd.
Electro-optical phase shifter having a low absorption coefficient
A semiconductor electro-optical phase shifter may include a central zone configured to be placed in an optical waveguide and doped at a first conductivity type, a first lateral zone adjacent a first face of the central region and doped at a second conductivity type, and a second lateral zone adjacent a second face of the central zone and doped at the second conductivity type.. .
Device echo cancellation
A device echo cancellation system and process are disclosed. According to one embodiment, the present invention comprises an input audio source that is converted to a digital signal via a pcm convertor where the amplitude of the input audio source is sampled at regular intervals and translated into digital pcm audio.
Max Sound Corporation
Transmitting unit for a magnetic resonance imaging system
A transmitting unit for a magnetic resonance imaging system includes a signal generating unit, an amplifier connected downstream of the signal generating unit, a power splitter connected downstream of the amplifier, and a plurality of electrically decoupled transmitting coils connected downstream of the power splitter. A connectable phase shifter is arranged between the power splitter and at least one transmitting coil of the plurality of electrically decoupled transmitting coils..
Semiconductor device resolution enhancement by etching multiple sides of a mask
A mask is disclosed which includes a plurality of first phase shift regions disposed on a first side of the mask, and a plurality of second phase shift regions disposed on a second side of the mask. The first phase shift regions and second phase shift regions may be alternating phase shift regions in which phase shift of the first phase shift regions is out of phase, for instance by 180 degrees, from phase shift of the second phase shift regions.
A method for processing a received digital signal includes generating a clock signal used for sampling the received signal by comparator which compares the received signal to a reference. A phase shifter adjusts the phase of the first clock signal to maximize the vertical eye opening of the signal at the sampling time.
Maxim Integrated Products, Inc.
Power dividing and/or power-combining circuits
Power-dividing and/or power-combining circuits have inputs, outputs, at least three electrical pathways, and at least three electronic devices, such as amplifiers, with substantially equal input and output reflection at least one of the electronic devices is in each of the electrical pathways. In one embodiment, multiple phase shift components, such as delay lines, are electrically connected to the electronic devices in each of the electrical pathways.
U.s. Army Research Laboratory Attn: Rdrl-loc-i
Technique for enhancing the power output of an electrostatic generator employing parametric resonance
A circuit-based technique enhances the power output of electrostatic generators employing an array of axially oriented rods or tubes or azimuthal corrugated metal surfaces for their electrodes. During generator operation, the peak voltage across the electrodes occurs at an azimuthal position that is intermediate between the position of minimum gap and maximum gap.
Lawrence Livermore National Security, Llc
Dynamic viscoelasticity as a rapid single-cell biomarker
The present invention generally relates to a method for determining the dynamic viscoelastic properties of cells, more particularly to a method for rapidly determining the dynamic viscoelastic properties of healthy and unhealthy cells by determining the phase shift be the application of a modulating force to the cells and the cells' response to the modulating force.. .
Colorado School Of Mines
Contactless determining the ray of a beam, corresponding system
The invention relates to a method for measuring a ray r0 of a radiation beam (20), characterized in that it comprises the steps according to which a source (2) of a radiation beam (20) excites (s1) a standard member (1) via heat, in a periodic manner at a frequency (f), thereby obtaining a periodic thermal excitation of the standard member (1); a sensor (3) measures (s2) a periodic in thermal response on the part of the standard member, in response to the periodic thermal excitation; a processor (4) determines (s3) a phase shift (φ) between the periodic thermal excitation and the periodic thermal response; the source (2) exciting the standard member for a plurality of frequencies (f) and the processor (4) determining a phase shift for each frequency (f), and thereby determining a plurality of phase shifts (φ); the processor (4) determines (s4) a minimum φ min of the phase shift (φ) thanks to the plurality of phase shifts determined in this manner, and determines (s5) the ray r0 of the beam (20) via the following formula: r0=Δ/g(φmin) where Δ is the thickness of the standard member (1) and where g is a function dependent on the type of heat radiation beam (20).. .
Transceiver, method, computer program and communication device
A transceiver is disclosed comprising a transmitter; a receiver; and a signal transmission arrangement. The transmitter comprises a power amplifier, and the signal transmission arrangement is arranged to transmit signals provided from the transmitter through its power amplifier, and arranged to receive signals and provide them to the receiver.
Circuit for the inductive heating of a metal
The invention relates to a circuit for the inductive heating of a metal that is optionally embedded in a non-magnetic bed by means of a transformer. The transformer induces eddy currents in the metal as a function of an exciter current il and an exciter voltage ul and forms a load impedance xl together with the metal to be heated.
Beamforming modular phased antenna array
Generally, this disclosure provides systems and methods for modular antenna array beamforming with controllable antenna module delay for improved beam steering accuracy. A system may include a plurality of antenna modules, each of the antenna modules comprising an array of antenna elements coupled to an rf beamforming circuit, the rf beamforming circuit to adjust phase shifts associated with the antenna elements to generate an antenna beam associated with the antenna module; a delay circuit coupled to each of the antenna modules; and a central beamforming module coupled to each of the delay circuits, the central beamforming module to control the antenna beam associated with each of the antenna modules and further to adjust signal delays associated with the delay circuits, wherein the arrays of antenna elements of the antenna modules combine to operate as a composite antenna beamforming array..
System and an optical coupler
In one embodiment, an optical directional coupler includes an input terminal configured to receive an input optical signal and a first coupler optically coupled to the input terminal, where the first coupler has a first coupling length, and where the first coupler is configured to couple a first portion of the input optical signal to a first optical leg and a second optical portion of the input optical signal to a second optical leg. The optical directional coupler also includes the first optical leg, where the first optical leg is configured to phase shift the first portion of the optical signal to produce a first phase shift signal and the second optical leg, where the second optical leg is configured to phase shift the second portion of the optical signal to produce a second phase shift signal, and where the first phase shift signal has a phase difference relative to the second phase shift signal.
Positive coefficient dynamic electro-optical phase shifter
A semiconductor electro-optical phase shifter may include an optical action zone configured to be inserted in an optical waveguide, and a bipolar transistor structure configured so that, in operation, collector current of the bipolar transistor structure crosses the optical action zone perpendicular to the axis of the optical waveguide.. .
Adaptive phase shift apparatus and method
The invention discloses an adaptive phase shift method in a multi-carrier system, comprising: generating a group of one or more new phase values for corresponding one or more phase shift carriers, pscs, based on quantization phase values; calculating and comparing a backward maximum power in an evaluation path with the group of one or more new phase values in one timeslot and a forward maximum power in a working path with current phase values in the timeslot; and adjusting phase of the pscs based on the group of one or more new phase values if the calculated backward maximum power is less than the calculated forward maximum power. An adaptive phase shift apparatus is also disclosed.
Demodulation in vamos receivers
A desired signal and interfering signal are transmitted in the same timeslot and on the same frequency using an adaptive quadrature phase shift keying (aqpsk) modulated carrier. When the subchannel power imbalance ratio (scpir) for the aqpsk modulated carrier is large and favors the interfering signal, sic is used to cancel the interfering signal from the received signal.
Optical object recognition system
An optical object recognition system includes at least two beacons, an image sensor and a processing unit. The beacons operate in an emission pattern and the emission pattern of the beacons has a phase shift from each other.
Electromagnetic wave propagation disruption device and producing same
An electromagnetic wave propagation disruption device with a metamaterial structure including: a plurality of conductive elements arranged on a top face of a substrate; a plurality of interconnection networks electrically interconnecting at least some of these conductive elements, wherein these networks are not electrically connected to each other. At least two of these networks are dimensioned differently to each other, thus involving that distances between interconnected conductive elements are different from one network to another, to generate phase shifts, between the conductive elements interconnected thereby, different from one network to the other.
A system and method of calibrating an amplifier are presented. The amplifier has a first amplification path and a second amplification path.
Hand-held test meter with time-multiplexed phase detection
A hand-held test meter for use with an analytical test strip in determining an analyte in a fluid sample includes a housing retaining a microcontroller block and a phase-shift-measurement block. The measurement block includes a signal-generation sub-block that provides an excitation voltage signal; an interface sub-block that receives the analytical test strip and permits applying the voltage excitation signal to the test strip to provide a resultant current signal; a transimpedance conversion sub-block that receives the resultant current signal and provides a resultant voltage signal; and a phase detector responsive to the resultant voltage signal and a reference signal.
A sub-harmonic mixer comprising a mixer circuit with input ports for rf and lo signals, and an output port for the product of the signals at the input ports, and an lo switching stage with input ports for an lo signal and the lo signal phase shifted 180 degrees. The lo switching stage comprises a third input port to which the output port of the mixer circuit is connected and a first output port for the product of the signal at its third and first input ports, and a second output port for the product of the signal at the third and second input ports with the same amplitude as the first output signal 180 degrees phase shifted.
System and an optical phase shifter
In one embodiment, an optical phase shifter includes a first phase-shifter configured to phase shift a transverse electric (te) component of an optical signal by a first phase-shift to produce a te component of a first signal, and a transverse magnetic (tm) component of the optical signal by a second phase-shift to produce a tm component of the first signal. The optical phase-shifter includes a polarization-rotator configured to rotate the te component of the first signal to produce a tm component of a rotated signal, and the tm component of the first signal to produce a te component of the rotated signal.
Differential phase tracking in the presence of unknown interference
Example embodiments comprise a diversity receiver, and corresponding method, for measuring a differential phase between a first local oscillator of a first antenna and a second local oscillator of a second antenna in the presence of a primary interference signal and at least one secondary interference signal. The method may comprise receiving a primary communication signal, a primary reference signal and additional reference signals, and processing these signals such that a summation signal does not substantially comprise the at least one secondary interference signal.
Half-duplex phased array antenna system
In an exemplary embodiment, a phased array antenna comprises a bidirectional antenna polarizer and is configured for bidirectional operation. The bidirectional antenna polarizer may combine active implementations of power splitters, power combiners, and phase shifters.
A doherty amplifier has different drain voltages applied to the power transistors of the main and peaking stages. The impedance inverter comprises at least one first series phase shifting element between the output of the main amplifier and the doherty amplifier output and at least one second series phase shifting element between the output of the peaking amplifier and the doherty amplifier output.
Optical unit and organic light emitting diode display having the same
An optical unit on a light emitting unit includes a first polarizing plate on the light emitting unit, a second polarizing plate on the first polarizing plate, the second polarizing plate having a higher polarization degree than the first polarizing plate, and a plurality of phase shift plates between the first polarizing plate and the second polarizing plate.. .
Three-dimensional hot spot localization
A non-destructive approach for the 3d localization of buried hot spots in electronic device architectures by use of lock-in thermography (lit). The 3d analysis is based on the principles of thermal wave propagation through different material layers and the resulting phase shift/thermal time delay.
Method for determining a power consumption in an electric installation and alternating current electric installation
A group including a plurality of individual distribution branches connected in parallel is connected to an alternating-current power supply. A method includes: a) detection of a change in the electrical consumption of one specific branch among the branches; and b) determination of individual power consumption of the specific branch, based on a measurement of the total voltage, which is substantially constant during the change, measurements of intensity and phase shift values of the total current before and after the change, and measurements of intensities of individual current in the specific branch before and after the change..
Method of manufacture of a passive high-frequency image reject mixer
A passive implementation of an image reject mixer (irm), capable of operating at very high frequency, is manufactured in a variety of silicon processes. The irm comprises a quad mos multiplier and a lumped-element hybrid, resulting in a passive irm, operative at radio frequencies (rf) of tens of ghz with an intermediate frequency (if) of several ghz.
Dual static electro-optical phase shifter having two control terminals
A semiconductor electro-optical phase shifter comprises a central zone (i1, i2) having a minimum doping level; first and second lateral zones (n+, p+) flanking the central zone along a first axis, respectively n and p-doped, so as to form a p-i-n junction between the first and second lateral zones. The central zone comprises first and second optical action zones (i1, i2) separated along the first axis.
Static electro-optical phase shifter having a dual pin junction
A semiconductor electro-optical phase shifter may include a first optical action zone having a minimum doping level, a first lateral zone and a central zone flanking the first optical action zone along a first axis, doped respectively at first and second conductivity types so as to form a p-i-n junction between the first lateral zone and the central zone. The phase shifter may include a second optical action zone having a threshold doping level, and a second lateral zone flanking the second optical action zone with the central zone along the first axis doped at the first conductivity type so as to form a p-i-n junction between the second lateral zone and the central zone..
Ultra-responsive phase shifters for depletion mode silicon modulators
A novel phase shifter design for carrier depletion based silicon modulators, based on an experimentally validated model, is described. It is believed that the heretofore neglected effect of incomplete ionization will have a significant impact on ultra-responsive phase shifters.
Clock reproducing and timing method in a system having a plurality of devices
A system includes a memory controller and a plurality of semiconductor devices that are series-connected. Each of the devices has memory core for storing data.
Method and apparatuses for algorithm on qam coherent optical detection
Blind polarization demultiplexing algorithms based on complex independent component analysis (ica) by negentropy maximization for quadrature amplitude modulation (qam) coherent optical systems are disclosed. The polarization demultiplexing is achieved by maximizing the signal's non-gaussianity measured by the information theoretic quantity of negentropy.
Composite ac-to-dc power converter with boosting capabilities using t configuration
A boosting ac-to-dc converter an ac-to-dc converter may include a main rectifier, a first auxiliary rectifier, a second auxiliary rectifiers and a transformer assembly. The transformer assembly may include a set of primary windings arranged in a first multiphase configuration and connected to the main rectifier, a first set of secondary windings arranged in a second multiphase relationship and connected to the first auxiliary rectifier and a second set of secondary windings arranged in a third multiphase configuration and connected to the second auxiliary rectifier.
Apparatus and high-speed phase shifting for interferometric measurement systems
Described are a method and apparatus for high-speed phase shifting of an optical beam. A transparent plate having regions of different optical thickness is illuminated by an optical beam along a path of incidence that extends through the regions.
Oscillation device, scanning-type scanner device, information terminal, phase-shift amount adjustment device, and phase-shift amount adjustment method
An oscillation device includes an oscillator, an oscillation detection unit that detects oscillation of the oscillator and outputs an oscillation detection signal, and a drive unit that generates a drive signal in keeping with the oscillation detection signal and outputs the drive signal to the oscillator. The drive unit includes a phase shift unit that shifts the phase to provide the drive signal as positive feedback to the oscillator.
Ultraviolet light emitting diode array light source for photolithography and method
A light source includes a plurality of ultraviolet (uv) light emitting diodes (leds) and an led phase shift controller coupled to the plurality of uv leds adapted to control the phase shift of each uv led in the plurality of uv leds. The plurality of uv leds forms a uv led array.
Digital beamforming antenna and datalink array
A method and system for beamforming a multi-element array using time delays is provided. The array includes transmit array elements and receive array elements.
System and controlling an energy storage device
The invention relates to a method for controlling an energy storage device that comprises n output connections, wherein n≧2, for producing a supply voltage at each of the output connections, and n energy supply branches, which are each coupled to one of the output connections, wherein each of the energy supply branches comprises a plurality of series-connected energy storage modules that each comprise an energy storage cell module comprising at least one energy storage cell, and a coupling device having coupling elements in a full bridge circuit that is designed to connect or bridge the energy storage cell module selectively in the respective energy supply branch. The method according to the invention comprises the following steps: for a number k of energy storage modules of at least one first energy supply branch, generating a first pulse width modulated control signal for controlling the coupling devices of the respective energy storage modules by comparing a first target value signal with a number 2k first periodic reference signals having a pulse period t, which signals each have a phase shift of t/2k relative to the adjacent first reference signals; and, for a number k of energy storage modules of at least one second energy supply branch, generating a second pulse width modulated control signal for controlling the coupling devices of the respective energy storage modules by comparing a second target value signal with a number 2k of second periodic reference signals having the pulse period t, which each have a phase shift of t/2k relative to the adjacent second reference signals.
Generating a signal
A method for generating a signal for a transmission antenna in a magnetic resonance imaging system includes generating a real part and an imaginary part of a baseband signal, generating a real part and an imaginary part of variations in frequency and in phase, and performing a complex multiplication of the baseband signal with the variations in frequency and in phase and a radiofrequency carrier signal for modulation. The method also includes modifying the modulated signal, and may include establishing a characteristic angle for a phase shift of the modified signal, and correcting the modulation based on the established angle in a closed-loop control..
Method of compensating frequency drift in an interferometer
A method of compensating for frequency drift of a reference energy source in an ft interferometer based spectrometer instrument, the method further comprising comparing in an arithmetic unit data representing a reference interferogram and data representing a target interferogram to determining a phase shift between the interferograms in a window w in at least one region away from center-burst and generating in the arithmetic unit a mathematical transform dependent on the determined shift or shifts to be subsequently applied to control the operation of the spectrometer instrument in order to generate data representing a frequency stabilized interferogram of an unknown sample recorded by the ft interferometer.. .
Receiving device, signal processing device, and signal processing method
A receiving device according to the present invention includes: a receiver for receiving an ofdm symbol that is modulated by phase shift keying; an fft processor for applying an fft process to the received ofdm symbol to obtain a subcarrier signal; a demapping unit for demapping the subcarrier signal to generate a bit string; a norm calculator for calculating the norm of the subcarrier; a weighting factor generator for generating a weighting factor by taking the statistics of the calculated norm; and a weighting unit for obtaining a soft decision value by weighting the bit string after demapping, based on the particular weighting factor. Thus, the receiving device can obtain a soft decision value to achieve good decoding performance with a small number of known signals and processes..
Optical modulator and encoding communications traffic in a multilevel modulation format
An optical modulator is described, comprising—an optical splitter to receive an optical carrier signal and split it into sub-signals; modulation assemblies, each comprising a binary optical modulator to apply a binary phase shift keyed, (bpsk) modulation to a respective optical sub-signal to form a bpsk modulated optical sub-signal. Modulation assemblies comprise a phase-shifter, each to apply a phase shift to the respective bpsk modulated optical sub-signal in dependence on a pre-selected modulation format; an encoding apparatus to receive communications traffic, to map into symbols, and to generate and transmit a respective drive signal to the optical modulator of a modulation assembly, each drive signal to cause the optical modulator to apply said bpsk modulation, to encode the symbols onto the respective optical carrier sub-signal; and a combiner to receive each bpsk modulated optical sub-signal to form an output optical signal having said multilevel modulation format..
Method for the contactless charging of the battery of an electric automobile
A method for contactless charging of the battery of an electric automobile by magnetic induction using a transmitter coil of a charging device and a receiver coil of the vehicle, the method including: controlling a power supply of a converter, at terminals of which the transmitter coil is connected, according to a variable frequency; measuring, in an analog circuit, a value of a current and of a voltage at the terminals of the transmission coil; calculating a phase shift between the current and the voltage; converting the phase shift into a digital value; and locking the variable frequency of the converter to the phase-shift value by digital processing.. .
Phase shift a tem
A method of electron microcopy passes an electron beam through a phase plate, specifically a zernike type phase plate, comprising a central hole, and a thin film causing a phase shift of the electrons passing through said film. This phase shift causes the contrast transfer function (ctf) to change from a sine-like function to a cosine-like function.
Method of using a phase plate in a transmission electron microscope
The invention relates to a method of using a phase plate, having a thin film, in a transmission electron microscope (tem), comprising: introducing the phase plate in the tem; preparing the phase plate by irradiating the film with a focused electron beam; introducing a sample in the tem; and forming an image of the sample using the prepared phase plate, wherein preparing the phase plate involves locally building up a vacuum potential resulting from a change in the electronic structure of the thin film by irradiating the phase plate with a focused beam of electrons, the vacuum potential leading to an absolute phase shift 10 with a smaller value than at the non-irradiated thin film. Preferably the phase plate is heated to avoid contamination.