|| List of recent Phase Shift-related patents
|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 method of 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 method for 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.
A phase interpolator is provided. The phase interpolator includes a plurality of capacitors, a first input for a clock signal, a second input for a phase shift clock signal and an output.
|Transceiver iq calibration system and associated method|
Local oscillator (lo) in-phase/quadrature (iq) imbalance correction data are generated for one or both of the transmitter and receiver of a radio-frequency (rf) communication device. An rf transmitter output signal is generated by the transmitter from a known test signal and transmitted to the receiver, where a baseband receiver signal is produced.
A phase interpolator is provided. The phase interpolator includes a plurality of capacitors, a first input for a clock signal, a second input for a phase shifted clock signal, a reference input for a reference signal, and an output.
|Synchronous data system and method for providing phase-aligned output data|
Embodiments of a synchronous data system and method for generating phase-aligned output data are generally described herein. In some embodiments, the synchronous data system includes a plurality of transmitter-receiver (tx-rx) pairs, each associated with a delay-locked loop (dll) and arranged to generate corresponding output data stream based on a high-speed clock of the associated tx-rx pair.
|Anti-reflecting covering structure with a diffraction grating using resonant elements|
A diffractive device for fitting to a façade of a building, or to any other reflective wall, exposed to electromagnetic radiation emitted by a source located at a distance from the building, the device including a plurality of tubular resonant elements arranged on the façade of the building, where the resonant elements are arranged in a substantially parallel manner on the façade of the building in such a way as to form a diffraction grating and are oriented in a substantially perpendicular direction to the plane defined by the propagation vectors of the incident and reflected electromagnetic waves, each resonant element being configured to form an lc resonator capable of re-radiating a wave corresponding to the incident wave affected by a phase shift; the set of resonant elements being arranged in such a way that the incident wave is diffracted in a preferential direction.. .
|Three-dimensional imaging and display system|
A three-dimensional imaging and display system is provided in which user input is optically detected in an imaging volume by measuring the path length of an amplitude modulated scanning beam as a function of the phase shift thereof. Visual image user feedback concerning the detected user input is presented..
An antenna device includes an input/output portion for a high frequency signal to be input or output, a distributing portion for distributing the high frequency signal input to the input/output portion into a plurality of high frequency signals, a phase shifting portion for imparting the plurality of high frequency signals with a predetermined amount of phase shift, and a feeding portion for feeding a plurality of antenna elements with the plurality of high frequency signals imparted with the predetermined amount of phase shift to cause the plurality of antenna elements to radiate the plurality of high frequency signals. The feeding portion is configured as a triplate line with a center conductor placed between one pair of parallel plate shaped outer conductors..
|Distributed feeding device for antenna beamforming|
A distributed feeding device for antenna beamforming comprises a first distributed feeding circuit comprising p inputs and n outputs, for producing a signal on each of its outputs with a phase shift which is substantially constant between two adjacent outputs, at least one frequency multiplexer connected to at least one input of the said first circuit, a number n of frequency demultiplexers each connected, by their input, to an output of the first circuit and a second distributed feeding means comprising a plurality of inputs, each connected to an output of one of the frequency demultiplexers, and a plurality of outputs, the second distributed feeding means comprising at least one second distributed feeding circuit comprising q inputs and m outputs, for producing a signal on each output with a phase shift which is substantially constant between two adjacent outputs, the integers p, n, q and m being equal or distinct.. .
|Active attenuator keeping saturated output power for reduced input power|
An active attenuator is disclosed. The attenuator includes a divider to divide an input signal into two signals, a phase shifter to shift a phase of one of output signals of the divider, and a combiner to combine an output of the phase shifter with another of output signals of the divider.
|Coupled line system with controllable transmission behaviour|
The invention relates two lines each with two terminals. A first line provides a first terminal and a second terminal.
|Apparatus and method for assessing percutaneous implant integrity|
Provided is an apparatus for assessing interface integrity between a medium and an implant. A first signal is translated from a motion of an impact body during impact with an abutment connected to the implant.
|Millimeter wave phase shifters using tunable transmission lines|
Tunable phase shifters and methods for using the same include a signal line; one or more grounding lines; one or more crossing lines below the signal line in proximity to the signal line and substantially perpendicular to a longitudinal direction of the signal line, where the crossing lines conform to the shape of the signal line along at least three surfaces of the signal line and where the crossing lines have a tunable capacitance; and an inductance return line below the crossing lines substantially parallel to the longitudinal direction of the signal line, where the inductance return line provides a tunable inductance.. .
|Wireless communication unit, radio frequency module and method therefor|
A wireless communication unit includes at least one antenna port; a transmitter and a receiver operably coupled to the at least one antenna port via a duplexer; wherein the duplexer includes a dynamically reconfigurable phase shift network that includes: at least one tunable radio frequency (rf) component; and at least one switch operably coupled to the tunable rf component and controllable to reconfigure the dynamically reconfigurable phase shift network to selectively support both normal and reverse duplexer modes of operation for rf signals passing there through.. .
|Balanced flux isolation transformer based eighteen pulse rectification scheme for use with variable frequency drives|
An ac/dc converter system comprises an input circuit for connection to a three-phase ac source. An isolation transformer comprises a symmetrical core with a set of primary windings and first and second sets of secondary windings wound on the symmetrical core providing balanced flux in all three phases and magnetically coupling to the set of primary windings.
|Antenna apparatus, base station and communications system|
Embodiments of the present invention provide an antenna apparatus, a base station and a communications system. The antenna apparatus includes: an antenna part, including a common radome; an active part, connected to the antenna part and including at least one active module, where each active module includes at least one antenna element, and an element reflector and a phase shifter and a radio frequency module that are corresponding to each antenna element, where the element reflector of the at least one active module is configured to implement an antenna function; and a common part, connected to the active part and the antenna part, and shared by the at least one active module in the active part, where the common part includes at least one common module.
|Capacitive switch having high accuracy|
There is provided a capacitive switch including a drive circuit, a detection circuit, a reference circuit and an identification unit. The drive circuit inputs identical drive signals to the detection circuit and the reference circuit.
|Ironless magnetic linear motors having levitating and transversal force capacities|
A ironless magnetic motor (21-23) employs a magnetic track (30) and a forcer (40). The forcer (40) is orientated in relations to a magnetic field (β) across a linear air gap of the magnetic track (30) to generate a drive force (fx) parallel to the x drive axis and orthogonal to the z levitation axis in response to a commutation drive current (ix) and to generate a force (fz, fy) orthogonal to the x drive axis in response to a commutation coil current (iz, iy) being superimposed on and phase shifted from the commutation drive current (ix).
|Single straight tube flowmeter and method of flow measurement|
A single straight tube flowmeter has a body; a tube through which a flow of fluid passes; two systems of excitation of oscillations in two planes which are perpendicular to one another and including adaptor units; a block of processing of information data including a phase shift of the adaptors located in one plane, frequency of oscillations of the tube, and temperatures of the tube and the body and outputting results of measurement of a mass flow rate and density of the fluid; and components for imparting to the tube a rotary motion relative to its neutral immovable position to increase accuracy of measurements by suppressing vibration disturbances.. .
|Digital polar modulator for a switch mode rf power amplifier|
A digital polar modulator (dpm) for transforming a baseband signal into a modulated digital modulator output signal comprises an input unit and two low-pass delta-sigma modulators, a first one being connected downstream from the first input part and configured to provide at its output a first pulse train in dependence on an amplitude- modulating baseband signal component, and a second one being connected downstream from the second input part and configured to provide at its output a multilevel quantized signal in dependence on a phase modulating baseband signal component; a multiphase generator, which is configured to provide a set of square-wave carrier signals having a common carrier frequency and exhibiting discrete phase shifts with respect to each other; a multiplexer, which is configured to provide a multiplexer output signal that is formed by switching, in dependence on a signal received at a select input as a function of time, between selected ones of the carrier signals; and a combiner unit.. .
|Re-sampling with phase offset adjustment for luma and chroma to signal adaptive filters in scalable video coding|
A sampling filter process is provided for scalable video coding. The process provides for re-sampling using video data obtained from an encoder or decoder process of a base layer (bl) in a multi-layer system using adaptive phase shifting to improve quality in scalable high efficiency video coding (shvc).
|Re-sampling with phase offset adjustment for luma and chroma to select filters in scalable video coding|
A sampling filter process is provided for scalable video coding. The process provides for re-sampling using video data obtained from an encoder or decoder process of a base layer (bl) in a multi-layer system using adaptive phase shifting to improve quality in scalable high efficiency video coding (shvc).
|Multimedia broadcast multicast services via multiple transmit antennas|
A radio frequency equipment to transmit multimedia broadcast multicast services (mbms) signals includes a precoding circuit and an antenna array. The precoding circuit is configured to generate a first precoded mbms signal and a second precoded mbms signal, and the antenna array is configured to broadcast the first and second precoded mbms signals.
A multilevel inverter having an efficient structure is provided, the multilevel inverter including a modularized phase-shift transformer including a plurality of modules to provide a phase shifted voltage by receiving a 3-phase input voltage, a plurality of first group unit power cells configured to provide an output voltage of predetermined phase, a plurality of second group unit power cells configured to provide an output voltage of predetermined phase, a plurality of third group unit power cells configured to provide an output voltage of predetermined phase. One of the first group unit power cells, one of the second group unit power cells and one of the third group unit power cells are paired to provide an output voltage of same phase..
|Apparatus and methods for time domain measurement using phase shifted virtual intervals|
Systems and methods for perturbation analysis of harmonic oscillations in the time domain according to several embodiments can include a time domain switching sensor and a resonator for imposing a first oscillation and a second oscillation on the sensor. The first and second oscillations can have the same amplitude a and period p, but can have a known phase shift.
|Self-oscillation circuit and method thereof|
The self-oscillation circuit includes: a gyroscope sensor receiving a driving signal at its input terminal to resonate with and output it; a sensor driver outputting the driving signal for driving the gyroscope sensor; a phase shifter receiving a signal from the gyroscope sensor and shifting a phase of the received signal; and a time delay unit receiving the shifted signal from the phase shifter and delaying it for a predetermined time period, and then feeding the delayed signal back to the sensor driver.. .
|Torsional vibration damper assembly, in particular for the drive train of a motor vehicle|
A torsional vibration damping arrangement, particularly for the drivetrain of a vehicle, includes an input region (12) to be driven in rotation around an axis of rotation (a) and an output region (20), wherein a first torque transmission path (14) and parallel thereto a second torque transmission path (16) and a coupling arrangement (18) for superposing the torques conducted via the torque transmission paths (14, 16) are provided between the input region (12) and the output region (20), wherein a phase shifter arrangement (26) is provided in the first torque transmission path (14) for generating a phase shift of rotational irregularities conducted via the first torque transmission path (14) relative to rotational irregularities conducted via the second torque transmission path (16), and wherein the coupling arrangement (18) includes a coupling lever arrangement (54; 54a).. .
|Unidirectional sampling mixer|
A unidirectional sampling mixer utilizes a stepped phase modulation to shift the frequency of an input signal. An rf input signal is supplied to an rf input switch from an rf input port.
|Phase shift mask, method of forming asymmetric pattern, method of manufacturing diffraction grating, and method of manufacturing semiconductor device|
A technique of forming an asymmetric pattern by using a phase shift mask, and further, techniques of manufacturing a diffraction grating and a semiconductor device, capable of improving accuracy of a product and capable of shortening manufacturing time. In a method of manufacturing a diffraction grating by using a phase shift mask (in which a light shield part and a light transmission part are periodically arranged), light emitted from an illumination light source is transmitted through the phase shift mask, and a photoresist on a surface of a si wafer is exposed by providing interference between zero diffraction order light and positive first diffraction order light which are generated by the transmission through this phase shift mask onto the surface of the si wafer, and a diffraction grating which has a blazed cross-sectional shape is formed on the si wafer..
|Mask layout patterns for closely spaced primitives in phase shift photolithography masks|
Improved mask layout patterns are described for closely spaced primitives in phase shift photolithography masks. In one example, at least a portion of a photolithography mask layout is decomposed into primitives.
|Light receiving device and light receiving method|
A light receiving device includes: a converter digitalizing an analog signal with a given sampling clock frequency, the analog signal being obtained through a photoelectric conversion of a received optical signal; a plurality of fixed distortion compensators compensating an output signal of the converter for waveform distortion with a fixed compensation amount that is different from each other; a plurality of phase shift detector circuits detecting a sampling phase shift from an output signal of the plurality of the fixed distortion compensators; a phase-adjusting-amount determiner determining a sampling phase adjusting amount with use of an output signal of the plurality of the phase shift detector circuits; and a phase adjusting circuit reducing a phase difference between the sampling clock frequency and the received optical signal based on a determination result of the phase-adjusting-amount determiner.. .
|Orthogonal transform error corrector|
A phase adjuster arranges phases of waveforms of a complex signal after orthogonal transform. An edge detector detects an edge of the complex signal after phase adjustment.
|Branching circuit and rf circuit module|
A branching circuit includes a transmission filter and a reception filter. The transmission filter is connected between a transmission signal input terminal and an antenna connection terminal.
|Electro-mechanical resonance loop|
The invention relates to a controller, and more particularly, to systems, devices and methods of controlling a sensor having a resonating mass. The controller includes: an analog-to-digital converter (adc) unit for extracting a digitized sensor signal from the sensor signal; a phase controller for generating, based on the digitized sensor signal, a phase-controlled signal that is locked in phase with the digitized sensor signal; an amplitude controller for applying a gain to the digitized sensor signal to thereby generate an amplitude-adjusted signal; a modulator for modulating the amplitude-adjusted signal to thereby generate a modulated signal; and a phase shifter for shifting the phase of the modulated signal by 90 degrees.
|Arrangement and method for flow control of molten metal in a continuous casting process|
An arrangement for a continuous casting process. The arrangement includes a vessel having a first opening for receiving molten metal in the vessel, a second opening for discharging the molten metal from the vessel, and a body extending between the first opening and the second opening, a first magnetic arrangement attached to the body, the first magnetic arrangement having a magnetic core with legs, and coils arranged around the legs, and a power system configured to provide an alternating current superimposed on a carrier current to each of the coils, each pair of alternating current and carrier current provided to a coil forming a flow control current, wherein flow control currents provided to adjacent coils are phase shifted relative each other, thereby creating a travelling magnetic field in molten metal in the vessel.
A torque sensing device includes a rotating component configured to rotate about an axis of rotation and a first sensor positioned adjacent to the rotating component to sense instantaneous angular position of the rotating component at a first location. A second sensor is positioned adjacent to the rotating component radially inboard of the first sensor to sense instantaneous angular position of the rotating component at a second location.
|Optical transmitter and method thereof|
An optical transmitter including an optical modulator comprising a first modulator and a second modulator connected in parallel to each other in the form of a mach-zehnder interferometer, and a phase shifter connected to the second modulator in series, a high-speed generator configured to generate a single carrier signal or multi-carrier signals and apply the generated single carrier signal or multi-carrier signals to the optical modulator, and an output stabilizer configured to stabilize a final output optical signal of the optical modulator by controlling a bias of each of the first modulator, the second modulator and the phase shifter.. .
|Method for detecting heat generation points and device for detecting heat generate points|
A heat generation point detection method comprises: step of stabilizing an average temperature of a surface of an integrated circuit s; steps of applying a bias voltage of a low frequency to the integrated circuit s and acquiring a heat generation detection signal detected from the integrated circuit s in response thereto; steps of supplying a bias voltage of a high frequency and acquiring a heat generation detection signal detected in response thereto; steps of detecting a phase shift between the bias voltage of the low frequency and the heat generation detection signal and a phase shift between the bias voltage of the high frequency and the heat generation detection signal; and step of calculating a change rate of the phase shift against a square root of the frequency of the bias voltage, and obtaining depth information of the heat generation point from the change rate.. .
|Stereoscopic light recycling device|
A stereoscopic device for recapturing light is provided. A chassis is open on front and back sides and forms a rectangular housing with top, bottom, and two sides that frame the front and back openings.
|Radiation redirecting elements for portable communication device|
An antenna or set of antennae for a wireless device is provided by embedding the antennae into the battery case or generally the surface area of a wireless phone. The antenna connections are through the battery's connections to the wireless device.
|Method and system for a low-voltage integrated silicon high-speed modulator|
Methods and systems for a low-voltage integrated silicon high-speed modulator may include an optical modulator comprising first and second optical waveguides and two optical phase shifters, where each of the two optical phase shifters may comprise a p-n junction with a horizontal section and a vertical section and an optical signal is communicated to the first optical waveguide. A portion of the optical signal may then be coupled to the second optical waveguide.
|Beamforming with phase compensation|
A method and a base station for phase compensation in beamforming in a multi-antenna time division duplex (tdd) communication network. In a first transmission mode, the base station estimates a first phase shift between a first antenna port and a reference antenna port in uplink based on a measurement of a first sounding reference signal (srs).
|System and method for analyzing the energy consumption of electric loads in a consumer network|
The method for analyzing and displaying the energy consumption of electric loads according to the invention comprises, in principle, the following steps: providing at least one consumer network comprising a plurality of interconnected electric loads; sampling the total current, voltage and phase shift of the consumer network with a sampling rate of less than 5 hz; transmitting the sampled measured data through the internet to a means for load recognition; receiving the sampled measured data through the internet by the means for load recognition; determining individual loads in the measured data by the means for load recognition, comprising: determining temporal regularities of individual loads by means of a spectral analysis of the measured data, and/or generating load models for individual loads by modelling individual phenomena in the measured data by means of classifiers, and visualizing the energy consumption in the consumer network.. .
|Broadband butler matrix device|
A broadband butler matrix device includes a 90° branch-line hybrid coupler having an input terminal provided at one side thereof and configured to receive an input signal through the input terminal, and distribute and output the received signal such that the distributed signals have a phase difference of 90°. Further, the broadband butler matrix device includes a 45° broadband phase shifter configured to change the phases of the signals outputted through the 90° branch-line hybrid coupler, using an open and short stub having an electrical length of 45°..
|Power dividing phase shifter|
A power divider phase shifter is a structure of a hybrid ring formed of a power divider ring and two coupling rings. The input end of the power divider ring serves as the input of the power dividing phase shifter, while the output end of the power divider ring is connected with two parallel coupling rings, the output end of which each serves as the output of the power divider phase shifter..
|Modulating device and modulation method|
A modulating device including: a first convertor configured to generate a converted analog signal by analog conversion on a input digital signal, a modulator configured to generate a modulated signal by quadrature modulation, a phase shifter configured to generate a phase shift signal by phase rotation, a demodulator configured to generate a demodulated signal by quadrature demodulation, a second convertor to generate a converted digital signal by digital conversion, a calculating circuit configured to estimate a the first direct current offset based on the input digital signal and the converted digital signal, the first direct current offset being a noise of digital current component generated between the input digital signal inputted to the first convertor and the output signal inputted to the demodulator, and a correcting circuit configured to correct at least one among from the input digital signal to the output signal based on the first direct current offset.. .
|Electronic oscillation circuit|
An electronic oscillator circuit has a first oscillator, for supplying a first oscillation signal, a second oscillator, for supplying a second oscillation signal, a first controller for delivering the first control signal as a function of a phase difference between a first controller input and a second controller input of the first controller; a second controller for delivering the second control signal as a function of a phase difference between a first controller input of the second controller and a second controller input of the second controller; a resonator; at least a second resonance frequency, with a first phase shift dependent on the difference between the frequency of a second exciting signal and the second resonance frequency and processing means, for receiving the first oscillator signal and the second oscillator signal, determining their mutual proportion, looking up a frequency compensation factor in a prestored table and outputting a compensated oscillation signal.. .
|Method and magnetic resonance system for magnetic resonance thermometry|
In magnetic resonance (mr) thermometry, first and second magnetic resonance data that are acquired sequentially, from which a phase shift is determined between a measurement phase and a reference phase. In a first region of an examined person, the measurement phase is determined from the second magnetic resonance data and the reference phase is determined from the first magnetic resonance data.
|Gyro sensor driver and pulse translation device used therefor|
Disclosed herein are a gyro sensor driver and a pulse translation device used thereof. The gyro sensor driver, includes: a phase shifter that delays a signal output from an output terminal of a vibrating sensor to output a phase-shifted signal; a comparator that inverts a signal output from the phase shifter to output a clock signal; a reference voltage generator that generates and outputs reference voltage; and a pulse translator that receives the reference voltage output from the reference voltage generator and the clock signal output from the comparator to generate and output a signal of a predetermined pulse, thereby generating a desired driving signal with low current..
|Method for determining the acoustic characteristics of a mud filter cake|
A pressure response to low frequency harmonic pressure oscillations generated in a borehole by at least one oscillation source is registered by at least one acoustic sensor. A phase shift of stationary pressure oscillations registered by the acoustic sensor relatively to the low frequency harmonic pressure oscillations of the oscillation source and a ratio between an amplitude of the stationary pressure oscillations registered by the acoustic sensor and an amplitude of the low frequency harmonic pressure oscillations of the oscillation source are determined.
|Feed-forward linearization without phase shifters|
A method and system for providing a finite impulse response, fir, filter in a power amplification system are disclosed. An fir filter includes a first signal path having a first delay, τ1.
|Reduction of second order distortion in real time|
In a radio receiver, a method of reducing second order distortion components, involves at a first mixer, mixing an input signal with an oscillator signal to generate an i component of a received radio signal; at a second mixer, mixing the input signal with a phase shifted oscillator signal to generate a q component of the received radio signal; where the i and q components of the received signal have a receive bandwidth; computing an estimate of second order distortion components as a power output of the i and q components between approximately the receive bandwidth and twice the receive bandwidth of the received radio signals; and adjusting an operational parameter of the radio receiver to reduce the estimated value of second order distortion components. This abstract is not to be considered limiting..
|Estimation and reduction of second order distortion in real time|
A radio receiver method of reducing second order distortion components involves at a first mixer, mixing an input signal with an oscillator signal to generate an i component of a received radio communication signal; at a second mixer, mixing the input signal with a phase shifted oscillator signal to generate a q component of the received radio communication signal; computing an estimate of second order distortion as a function of the i and q components of the received radio communication signal; and adjusting an operational parameter of the radio receiver to reduce the estimated value of second order distortion components. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract..
|Extending beamforming capability of a coupled voltage controlled oscillator (vco) array during local oscillator (lo) signal generation through fine control of a tunable frequency of a tank circuit of a vco thereof|
A method includes implementing a coupled voltage controlled oscillator (vco) array with a number of vcos, and arranging a number of switched capacitor elements in a geometric proportion in a tank circuit of each vco to provide for finesse in control of a tunable frequency of the tank circuit. The method also includes utilizing a voltage control input of a varactor element of the tank circuit solely for achieving phase separation between the each vco and another vco of the coupled vco array based on the provision of finesse in the control of the tunable frequency of the tank circuit, and mixing local oscillator (lo) signals generated through the number of vcos of the coupled vco array with signals from antenna elements of an antenna array to introduce differential phase shifts in signal paths coupled to the antenna elements during performing beamforming with the antenna array..
|High frequency mixer, method and system|
A thin film circuit, particularly desirable for satellite communications, mixes rf and an lo giga-hertz-range input signals to yield an if signal by splitting the lo and rf signals into two, with a 180 degree phase shift introduced into one of the resulting signals. The lo and rf signals are then each mixed in parallel mixers.
|Method for improving cd micro-loading in photomask plasma etching|
Embodiments of the present invention provides methods to etching a mask layer, e.g., an absorber layer, disposed in a film stack for manufacturing a photomask in euv applications and phase shift and binary photomask applications. In one embodiment, a method of etching an absorber layer disposed on a photomask includes transferring a film stack into an etching chamber, the film stack having a chromium containing layer partially exposed through a patterned photoresist layer, providing an etching gas mixture including cl2, o2 and at least one hydrocarbon gas in to a processing chamber, wherein the cl2 and o2 is supplied at a cl2:o2 ratio greater than about 9, supplying a rf source power to form a plasma from the etching gas mixture, and etching the chromium containing layer through the patterned photoresist layer in the presence of the plasma..