55results about How to "Improve output signal quality" patented technology

An apparatus and a method for raising an output efficiency in a mobile communication terminal are provided. The apparatus includes a supply modulator and a power amplifier. The supply modulator includes a DC-DC converter, a voltage regulator, and a switching regulator. The supply modulator modulates an envelope component of an input signal to generate power. The power amplifier amplifies a phase component of the input signal using the power generated by the supply modulator as a power source of a collector / drain. The DC-DC converter raises battery power of the mobile communication terminal. The voltage regulator determines an output voltage of the supply modulator using the power raised by the DC-DC converter. The switching regulator determines an output current of the supply regulator using the battery power of the mobile communication terminal.

The invention discloses a tera-hertz silica-based quadrupler and a frequency multiplier, belonging to the field of RFIC (Radio Frequency Integrated Circuit). The quadrupler comprises transistors (M1 and M2) and transmission lines (L1, L2 and L-1), wherein the drain ends of the transistors (M1 and M2) are respectively connected to an output port through the transmission lines (L1 and L2), source ends are connected with a ground line, grid ends are respectively connected with the signal input ends of an path (I) and the path (Q) of a baseband signal (f0); the transmission line (L-1) is connected between the output port and a power supply; and the length of the transmission lines (L1 and L2) are 1 / 4 of that of the corresponding wavelength of a signal (2f0), the length of the transmission line (L-1) is 1 / 4 of that of the corresponding wavelength of a signal (4f0). The multi-frequency multiplier comprises a 2n frequency multiplier (1), a 2n frequency multiplier (2) and a transmission line (L), wherein the output ports of the 2n frequency multiplier (1) and the 2n frequency multiplier (2) are connected to be used as the output port of a 2n+1 frequency multiplier, the transmission line (L) is connected between the output port of the 2n+1 frequency multiplier and the power supply, and the length of the transmission line (L) is 1 / 4 of that of the corresponding wavelength of a signal (2n+1f0). The tera-hertz silica-based quadrupler and the multi-frequency multiplier, provided by invention, have the advantages of high output frequency, pure frequency spectrum, low power consumption and easiness for integration.

A current steering digital-to-analog (DAC) having improved dynamic performance and output signal quality (i.e. improved SFDR characteristic). The DAC includes current steering segments each having differential transistors to steer a current from a summing node to either the positive or negative output. The DAC further comprises a control circuit to reduce the variation of the voltage present at each summing node. More specifically, the control circuit includes a first circuit that controls the threshold voltage of the corresponding differential transistors that are electrically connected to the positive output in response to the sensed positive output voltage such that the voltages at the corresponding summing nodes remain constant. Similarly, the control circuit includes a second circuit that controls the threshold voltage of the differential transistors that are electrically connected to the negative output in response to the sensed negative output voltage such that the voltages of the corresponding summing nodes remain constant.

The present invention relates to a device (10) for obtaining and processing measurement readings including at least a component representative of a physical phenomenon in a living being (16), comprising a sensor (12) for obtaining measurement readings from at least one body part of a living being (16) from a distance having at least a component representative of the physical phenomenon in the living being (16), an identification unit (26) for identifying the at least one body part of the living being (16); an extraction unit (38) for extracting at least one first signal from the measurement readings representing at least one component representative of the physical phenomenon, an evaluation unit (30) for obtaining adjustment information according to the at least one identified body part, and an adjustment unit (34) for adjusting the at least one first signal according to the adjustment information and for generating at least one output signal representing the physical phenomenon of the living being (16).

A method and an apparatus for compensating for nonlinear distortion are provided to divide audio signals reproduced in a nonlinear speaker system into linear and nonlinear components in a time domain and a frequency domain, and then generate inversely-corrected signals by means of an inverse filtering scheme, so that it is possible to further consider a variety of nonlinear distortion characteristics such as viscous damping and structural damping which have not been reflected in the conventional lumped parameter method, and thus to obtain better sound quality.

The invention discloses a portable giant magnetostriction seismic source device comprising an impact output bar, a guidance protection head, a compressive pre-stress regulation pressure board, a giant magnetostrictive rod, a drive coil, an impact control circuit, a power supply module and an external shell, wherein the impact control circuit is connected with the drive coil and the power supply module; the impact control circuit and the power supply module are arranged in the external shell; the impact output bar is sequentially connected to the guidance protection head, the external shell and a back cap; the impact output bar is fixed by the guidance protection head which has a cone-shape circular table structure, the bottom surface of the guidance protection head is connected to one end of the external shell, the giant magnetostrictive rod is connected to the impact output bar through a spiral filament opening; the impact control circuit is arranged in the middle part of a cavity and is connected to the drive coil and the power supply module; the power supply module is arranged at the back end of the cavity and is connected with the drive coil and the impact control circuit. The invention enhances the portability of the device, reduces the charging time, strengthens the quality of seismic source signals, improves the efficiency of detection work and is convenient for operating and applying on site.

A method includes separating, at a device, an input audio signal into at least a low-band signal and a high-band signal. The low-band signal corresponds to a low-band frequency range and the high-band signal corresponds to a high-band frequency range. The method also includes selecting a non-linear processing function of a plurality of non-linear processing functions. The method further includes generating a first extended signal based on the low-band signal and the non-linear processing function. The method also includes generating at least one adjustment parameter based on the first extended signal, the high-band signal, or both.

This invention discloses an improvement to a digital Acoustic Echo Control (AEC) in hands-free telephones. It describes an additional adaptive filter referred to as a residual echo filter, which is placed after the usual echo canceller and it is used to efficiently and accurately estimate a residual echo signal b(i) and a system coupling factor β(i), which can be utilized to establish an efficient control for the AEC system and construct the appropriate filters. The invention also describes a control block means performing a joint operation control of the echo canceller, residual echo suppressor and residual echo filter for achieving more consistent echo cancellation results and enhancing output signal quality.

A soft magnetic underlayer includes a first amorphous soft magnetic layer to which an exchange bias magnetic field is applied directly from an antiferromagnetic layer or via a ferromagnetic layer, and a second amorphous soft magnetic layer which is formed on the first amorphous soft magnetic layer via a non-magnetic layer. The first amorphous soft magnetic layer and the second amorphous soft magnetic layer are antiferromagnetically coupled.

An apparatus and a method for raising an output efficiency in a mobile communication terminal are provided. The apparatus includes a supply modulator and a power amplifier. The supply modulator includes a DC-DC converter, a voltage regulator, and a switching regulator. The supply modulator modulates an envelope component of an input signal to generate power. The power amplifier amplifies a phase component of the input signal using the power generated by the supply modulator as a power source of a collector / drain. The DC-DC converter raises battery power of the mobile communication terminal. The voltage regulator determines an output voltage of the supply modulator using the power raised by the DC-DC converter. The switching regulator determines an output current of the supply regulator using the battery power of the mobile communication terminal.

A position-measuring device includes a measuring graduation extending along a measuring direction, a scanning unit for scanning the measuring graduation, and a detection device of the scanning unit including a plurality of detector elements that are arranged periodically one after the other along an extension direction and that, during scanning of the measuring graduation, generate output signals able to be supplied to an evaluation unit. In each case, a plurality of adjacent detector elements are interconnected to form a detector group such that their output signals are able to be joined and supplied as a unified signal to the evaluation unit. The detector elements are combined to form detector groups, and are arranged in the form of detector groups one after the other along the extension direction such that at least one defined harmonic is eliminated from the output signals.

A rotation detecting apparatus capable of increasing the angle detecting precision without being affected by an offset signal resulting from a stress in a silicon chip. The rotation detecting apparatus includes a magnetic sensor array and a magnet rotatable in face-to-face relation with the magnetic sensor array. The magnetic sensor array includes a plurality of groups of sensor elements, each group including four sensor elements. The four sensor elements of each combined sensor element group are so arranged as to be oriented vertically and horizontally in four directions and connected parallel to each other.

A wireless communication device including: a transmitter including two DA converter units which convert two digital signals into analog signals; a combiner which combines the analog signals; a distributor which extracts a portion of the combined signal as a feedback signal; an AD converter which converts the feedback signal; an oscillator unit which supplies clock signals to operate the DA converter units and the AD converter; a first separation unit which separates the feedback signal converted by the AD converter into two signals; and a comparator unit which compares at least one of the two digital signals that are obtained by separating the inputted digital signal, or, at least one of the two digital signals that are separately inputted, with the feedback signal separated by the first separation unit, wherein the oscillator unit controls the output clock signals based on a result of the comparison by the comparator unit.

The invention provides a low-dropout linear voltage stabilization circuit. The low-dropout linear voltage stabilization circuit comprises a power supply noise suppression module, an error amplification module, a source follower, a regulating tube and a first capacitor, wherein the power supply noise suppression module is introduced with a power supply noise signal; the error amplification module is used for amplifying an error signal of the output voltage and reference voltage of the low-dropout linear voltage stabilization circuit; the source follower is used for outputting an output signal of the error amplification module and the power supply noise signal to a control end of the regulating tube; the regulating tube is used for regulating the output voltage under the control of the output signal of the source follower, and counteracting the power supply noise signal; and the first capacitor is connected to the output end of the low-dropout linear voltage stabilization circuit. According to the low-dropout linear voltage stabilization circuit, the noise of a medium frequency power supply is loaded to the gate of the regulating tube to counteract the influence of the noise of the medium frequency power supply on the output signal, and the noise suppression abilities of low frequency and high frequency power supplies are amplified in conjunction with the gain and the output capacitance of the circuit, thereby realizing the high power supply noise suppression ability of a full frequency band of a low-dropout differential linear voltage regulator without out-chip capacitance,lowering the influence of the power supply noise on a transmission signal, and greatly improving the quality of output signal.

A voltage converter is disclosed. The voltage converter includes a constant on time signal generator, a first and second transistors, an inductor, a feedback circuit and a ripple injection circuit. The constant on time signal generator generates a first and second driving signals for driving the first and second transistors. The voltage converter generates an output signal at an output end thereof. The feedback circuit divides the output signal to generate a feedback signal at a feedback end of the voltage converter. The ripple injection circuit gets the voltage of the feedback end and the voltage of the phase end to generate a injection signal. The constant on time signal generator generates the first and second driving signals according to the injection signal, the output signal and a reference signal.

This invention discloses a receiver and a signal compensation method therefor. An adaptive equalizer and a baseline wander compensator are provided on the front end of the receiver to improve the quality of output signals. The signal compensation method enables the adaptive equalizer to use a long T as its observation unit when the transmission cable is idle, and enables the baseline wander compensator for operation and controls both the adaptive equalizer and the baseline wander compensator to use a short T as its observation unit when the transmission cable is transmitting data signals. The disclosed adaptive equalizer can achieve its optimal processing effects, and the efficiency of the baseline wander compensator can be increased.

The invention discloses a special multichannel radio frequency echo signal down converter for an MR-EPT spectrometer, and belongs to the field of MR-EPT imaging. The down converter comprises a local oscillator signal generation module, a power division module and a frequency-mixing amplitude-modulation phase-modulation unit which are connected in sequence, and a control module for controlling thefrequency of a local oscillator signal output by the local oscillator signal generation module and controlling the frequency-mixing amplitude-modulation phase-modulation unit to adjust the amplitude and phase of an output signal. The frequency mixing amplitude modulation and phase modulation unit comprises a plurality of radio frequency amplitude modulation and phase modulation modules. The radiofrequency amplitude modulation and phase modulation module comprises a radio frequency signal processing module for performing sideband suppression and impedance matching on a radio frequency echo signal, which are connected in sequence; a frequency mixing module used for carrying out frequency mixing on multi-channel local oscillation signals output by the power dividing module and radio frequency signals output by the radio frequency signal processing module, a filtering module, an amplifying module, a phase modulation module controlled by the control module to carry out phase shift, and anamplitude modulation module controlled by the control module to carry out amplitude modulation. The problem that an existing magnetic resonance spectrometer cannot be used for MR-EPT imaging in a 9.4T ultrahigh magnetic field environment is solved.

The invention relates to a method and a system for edge-adaptive frame rate up-conversion. One embodiment of the system of the invention comprises a capture block; a frame buffer; an edge-adaptive interpolator; a motion detector; a blender for receiving a prior input field signal from the frame buffer, an interpolated field signal from the edge-adaptive interpolator, and a motion signal, and generating an edge and motion-interpolated field signal; a synchronization control block for processing an input vertical synchronization signal received from the capture block and generating an output synchronization signal and an output field parity signal; a comparator for receiving and comparing the output field parity signal and an input field parity signal output from the capture block; and a multiplexer for selecting, based on the output of the comparator, and providing as an up-converted output signal, either one of the set of current input field signals output from the frame buffer or the edge and motion-interpolated field signal.

To provide a rotation detecting apparatus capable of increasing the angle detecting precision without being affected by an offset signal resulting from a stress in a silicon chip, the rotation detecting apparatus 3 includes a magnetic sensor array 5 and a magnet 4 rotatable in face-to-face relation with the magnetic sensor array 5. The magnetic sensor array includes a plurality of groups 16 of sensor elements each group 16 including four sensor elements. The four sensor elements 5a to 5d of each combined sensor element group 16 are so arranged as to be oriented vertically and horizontally in four directions and connected parallel to each other.

The invention discloses a tera-hertz silica-based quadrupler and a frequency multiplier, belonging to the field of RFIC (Radio Frequency Integrated Circuit). The quadrupler comprises transistors (M1 and M2) and transmission lines (L1, L2 and L-1), wherein the drain ends of the transistors (M1 and M2) are respectively connected to an output port through the transmission lines (L1 and L2), source ends are connected with a ground line, grid ends are respectively connected with the signal input ends of an path (I) and the path (Q) of a baseband signal (f0); the transmission line (L-1) is connected between the output port and a power supply; and the length of the transmission lines (L1 and L2) are 1 / 4 of that of the corresponding wavelength of a signal (2f0), the length of the transmission line (L-1) is 1 / 4 of that of the corresponding wavelength of a signal (4f0). The multi-frequency multiplier comprises a 2n frequency multiplier (1), a 2n frequency multiplier (2) and a transmission line (L), wherein the output ports of the 2n frequency multiplier (1) and the 2n frequency multiplier (2) are connected to be used as the output port of a 2n+1 frequency multiplier, the transmission line (L) is connected between the output port of the 2n+1 frequency multiplier and the power supply, and the length of the transmission line (L) is 1 / 4 of that of the corresponding wavelength of a signal (2n+1f0). The tera-hertz silica-based quadrupler and the multi-frequency multiplier, provided by invention, have the advantages of high output frequency, pure frequency spectrum, low power consumption and easiness for integration.

The invention provides a high-speed serial transmission circuit and a power supply jitter compensation circuit thereof. In the power supply jitter compensation circuit, if a continuous data judgment circuit judges that effective data to be transmitted by a high-speed serial transmission circuit is in a continuous fixed numerical value state, compensation data output by a compensation data generation circuit jump, and the compensation data are output to the input end of a compensation data pre-driving circuit. As the positive and negative electrodes of the power supply end of the compensation data pre-driving circuit and the positive and negative electrodes of the power supply end of the effective data pre-driving circuit have the same connection mode and are connected with the power supplyand the ground, the compensation data pre-driving circuit is used for enhancing the compensation data, and the load matching circuit is used for matching a parasitic load capacitor of a main drivingcircuit in the high-speed serial transmission circuit, the high-speed serial transmission circuit periodically charges and discharges the power supply and the ground when transmitting effective data,the noise of the power supply can be suppressed, the jitter of the power supply can be reduced, and the output signal quality of the circuit can be improved.

A method and a device for clipping control are provided in the present invention. The method includes: updating a clipping factor according to a maximum absolute value FrameLev in a current frame signal; obtaining a clipping restoration filter according to the clipping factor; filtering the current frame signal according to the clipping restoration filter to obtain a filtered clipping restoration signal. With the method and device for clipping control provided in the present invention, whether a clipping phenomenon occurs may be automatically detected, and clipping restoration is performed, so that subjective quality of an output signal is improved.

The invention relates to a magnetoelectric rotating speed sensor suitable for large-spacing measurement. The magnetoelectric rotating speed sensor comprises an armature framework, an enameled wire coil, a shell, an insulating sleeve, an insulating spacer, a lead, a connector and a shaft end bolt embedded with a permanent magnet, wherein the armature framework, the enameled wire coil, the insulating sleeve and the insulating gasket are assembled into an assembly, the assembly is installed inside the shell, the enameled wire coil and the connector are connected through a lead, and after connection is completed, potting is performed and the connector is fixed to the shell to form a magneto-electric rotating speed sensor sensitive assembly, the shaft end bolt is installed on a rotating shaft to be measured, periodic magnetic field changes are formed through the permanent magnet, and the assembly is installed in the magnetic field change range, so that the enameled wire coil generates sinusoidal alternating current signals, and then the alternating current is periodically converted into revolutions. The magnetoelectric rotating speed sensor has the advantages that large-spacing non-contact measurement between the sensor and the rotating shaft can be realized, the output amplitude is large, and the vibration resistance is strong.

An coaxial keg connector comprising a main body (1) made of plastic and having a first inlet port (3) and a second inlet port (3) receiving a stem (2). A coaxial outlet (10) comprises an outer outlet port (11) in communication with the first inlet port (3) and an inner outlet port (12) in communication with the second inlet port. The stem (2) comprises a tubular body with a main axis (31) with an inlet and a connector for attachment to the keg at one end. The second end of the stem opposite to the first end has an outlet in fluid communication with the inner outlet port (12) and comprises a ball joint (61) rotatably mounted in and sealed with respect to the main body (1) so as to be rotatable (12) about the main axis (31) of the tubular body and rotatable (67, 68) to a limited extent about axes perpendicular to the main axis.

The invention relates to an integrated circuit arrangement (10) comprising at least one digital-analogue converter (12) with a multitude of current-source transistors (N1-N8) arranged parallel to each other for providing current components (I1-I8) that in each case are predetermined in a fixed manner and are used to form an analogue current signal, wherein control inputs of the current-source transistors (N1-N8) can be subjected to a shared adjustment potential by way of an adjustment potential line (14), which adjustment potential defines the individual current components (I1-I8), and comprising an adjustment circuit (16) for providing the adjustment potential at the adjustment potential line (14). In order to drastically reduce interference, in particular noise, in the individual current components (I1-I8), the integrated circuit arrangement (10) comprises an external connection (18), which is connected to the adjustment potential line (14) for connecting an external capacitor (C0).

A signal amplification circuit includes a differential amplifier configured to receive a first signal and a second signal and generate an output signal, a differential amplifier configured to receive first and second signals and generate an output signal; and a controller configured to control an amount of current flowing in the differential amplifier using the output signal.

The invention relates to a high-precision synchronous vibration data collection card for various types of detection signals, and the data collection card comprises three IEPE interface circuits, wherein each IEPE interface circuit is connected with a constant current source circuit, and the output end of each IEPE interface circuit is sequentially in series connection with a program control amplification circuit, a filtering circuit, a single-end rotating difference circuit and an AD converter through the constant current source circuit. The output end of a 4-20mA current input interface circuit is connected with the input end of an I / V conversion circuit. The output end of the I / V conversion circuit and the output end of a millivolt-level voltage input interface circuit are respectively in series connection with the program control amplification circuits, the filtering circuits, the single-end rotating difference circuits and the AD converters. The output end of a + / -5V voltage signal input interface circuit is sequentially in series connection with the filtering circuits, the single-end rotating difference circuits and the AD converters. The AD converters in all interface circuits are cascaded, and then are connected to a single-chip microcomputer. The control input ends of the program control amplification circuits in all interface circuits are connected in parallel, and then are connected to the single-chip microcomputer. The single-chip microcomputer communicates with an upper computer through a USB port. The data collection card can achieve the high-precision synchronous collection of data.