38results about How to "Sufficient dynamic range" patented technology

The invention discloses a control method of an automatic gain in a power line carrier communication network, and belongs to the technical field of power line carriers. The control method relates to a front end low noise amplifier, an active band-pass filter, a programmable gain amplifier, an analog-digital conversion unit and an automatic gain control unit. The method comprises the steps that an input carrier signal passes through the front end low noise amplifier, lower noise amplification is conducted on the input signal firstly, and after band-pass filtering, the carrier signal with a high signal-to-noise ratio is obtained; the carrier signal is amplified through the programmable gain amplifier, an initial gain value of the programmable gain amplifier is set to be the maximum value in a preset reference range, analog-digital conversion is conducted on the input carrier signal after the input carrier signal is amplified, sampling is conducted on the converted carrier signal, and median filtering is conducted on an obtained sampling signal to obtain average intensity of the carrier signal; and the gain of the programmable gain amplifier can be adjusted according to a difference between the average intensity of the carrier signal and the preset reference range.

An apparatus for measuring the luminescence and the fluorescence of a sample, comprising: a light tight optics box capable of receiving a pipette tip containing a sample; an optical sensor located within the optics box and capable of being disposed in both a luminescence reading position and a fluorescence reading position; an excitation light fiber optic bundle and a sample transmission fiber optic bundle; an excitation light assembly that projects excitation light onto a first terminus end of the excitation light fiber optic bundle; and an in-line filter located along the sample transmission fiber optic bundle.

Presented herein are methods, devices and kits for the mass spectrometric immunoassay (MSIA) of proteins and their variants that are present in complex biological fluids or extracts. Protein and variant levels can be determined using quantitative methods in which the protein/variant signals are normalized to signals of internal reference standard species (either doped into the samples prior to the MSIA analysis, or other endogenous protein co-extracted with the target proteins) and the values compared to working curves constructed from samples containing known concentrations of the protein or variants.

An electronic circuit, which has transistors disposed on a substrate, each transistor including an active layer made of thin-film polysilicon, includes a sensor that converts a measured quantity into a current value, a current-voltage conversion circuit that converts the current value into a voltage, and a voltage detection circuit that detects the voltage converted by the current-voltage conversion circuit and outputs a predetermined signal. The current-voltage conversion circuit includes a storage circuit and a range-switching circuit that switches a current-voltage conversion range of the current-voltage conversion circuit by switching the capacitance of the storage circuit.

A method is provided for the design of a wide-band high dynamic-range electromagnetic signal receiving system. The method provides for receiving a plurality of analog signals, converting the plurality to a digital replica that can be processed to recover separate high-fidelity replicas of each individual signal in the received plurality. The method also provides increasing the signal dynamic range with a parallel architecture comprising “p” identical parallel analog-to-digital channels wherein the value of is determined by the ratio of the largest amplitude signal to the minimum detectable signal. Further, it is demonstrated that “p” is the fundamental limit on the number of parallel channels necessary to linearly process a specified plurality of signals containing a largest signal and a minimum detectable signal.

An apparatus and method for detecting beam power generated by a plurality of light sources, using a single device. The apparatus includes a light-receiving unit that receives the beam power generated by one of a plurality of light sources, and an amplifying unit that selects a gain, amplifies the beam power received by the light-receiving unit according to the selected gain, and outputs the beam power amplified as a detected beam power. According to the apparatus and method, received beam power (or amplification gain) is amplified by a gain determined according to the characteristics of the respective light sources. Thus, it is possible to provide the detected beam power in consideration of a sufficient dynamic range for the each light source, thereby realizing effective APC.

Optical amplification stage (1) for OTDR monitoring, comprising a first (2a) and a second optical signal path (2b), a first (3a) and a second optical amplifier (3b), a first optical coupler (4a) placed along the first optical signal path downstream the first optical amplifier, a second optical coupler (4b) placed along the second optical signal path downstream the second optical amplifier, an optical by-pass path (5) optically connecting the first and the second optical coupler, a first (11a) and a second optical reflector (11b) optically connected to respectively the first and second optical coupler, and an optical filter (10) placed along the optical by-pass path which has attenuation high on the whole WDM band and low at the OTDR wavelength(s).

For an automatic adjustment of a detector voltage, a measurement of a standard sample is performed, in which a reflection voltage generator under the control of an autotuning controller applies, to a reflector, voltages which are different from those applied in a normal measurement and do not cause temporal conversion of ions. Ions having the same m/z simultaneously ejected from an ejector are dispersed in the temporal direction and reach a detector. Therefore, a plurality of low peaks corresponding to individual ions are observed on a profile spectrum. A peak-value data acquirer determines a wave-height value of each peak. A wave-height-value list creator creates a list of wave-height values. A detector voltage determiner searches for a detector voltage at which the median of the wave-height values in the wave-height-value list falls within a reference range.

In a communication device for receiving signals from devices that become communication partners, received signals from the respective devices are identified. Each of the devices that become communication partners is provided with a frequency spectrum of a pattern specific to each of the devices. In the communication device, storage means stores correspondence between information identifying the devices that become communication partners and the frequency spectrums provided to the respective devices, acquisition means acquires a frequency spectrum contained in a received signal, identification means compares the frequency spectrum acquired by the acquisition means with the frequency spectrums stored by the storage means to identify a device corresponding to the frequency spectrum that coincides with the frequency spectrum acquired by the acquisition means and which is stored by the storage means.

Presented herein are methods, devices and kits for the mass spectrometric immunoassay (MSIA) of proteins present in complex biological fluids or extracts. Pipettor tips containing porous solid supports that are covalently derivatized with affinity ligand and used to extract specific proteins and their variants from various biological fluids. Nonspecifically bound compounds are rinsed from the extraction devices using a series of buffer and water rinses, after which the wild type protein (and/or its variants) are eluted directly onto a target in preparation for analysis such as matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Mass spectrometry of the eluted sample then follows with the retained proteins identified via accurate molecular mass determination. Protein and variant levels can be determined using quantitative methods in which the protein/variant signals are normalized to signals of internal reference standard species (either doped into the samples prior to the MSIA analysis, or other endogenous protein co-extracted with the target proteins) and the values compared to a working curves constructed from samples containing known concentrations of the protein or variants. Such MSIA devices, kits and methods have significant application in the fields of; basic research and development, proteomics, protein structural characterization, drug discovery, drug-target discovery, therapeutic monitoring, clinical monitoring and diagnostics, as well as in the high throughput screening of large populations to establish and recognize protein/variant patterns that are able to differentiate healthy from diseased states.

An input apparatus includes a sensor section configured to include a plurality of detection units, and to control positive and negative polarities of a detection signal at each detection position, a control unit configured to generate a group of combined detection signals in which polarity patterns are different from each other, and a signal reproduction unit configured to reproduce signal levels of a group of detection signals on the basis of a group of combined detection signals and a group of polarity patterns, in which at least some of the plurality of detection units differ in the number of detection positions, and the control unit selects the group of polarity patterns according to the number of detection positions so that the number of positive polarities and the number of negative polarities included in each of the polarity patterns are similar to each other.

The invention relates to a portable reflectometer and to a method for characterizing the collector mirrors used in solar power plants for the in-field characterization of reflection coefficients. The equipment includes all of the components required for this measurement, such as a module to measure the reflection coefficient of the mirror, an electronic data acquisition and processing system, a system for processing data and controlling the equipment, a system for storing the data of interest, a user interface system, and a system allowing communication between the aforementioned systems and an outer casing. The equipment can be used to characterize the specular reflection coefficient of flat or curved mirrors of different thicknesses, without requiring adjustments to be made to the equipment, minimizing the influence of diffuse reflection on the measurement.

A method of performing cancellation for acoustic or electromagnetic measurement or communications includes receiving an output signal to be applied to a transmit transducer, introducing a delay to the output signal to produce a delayed output signal, applying the delayed output signal to the transmit transducer, receiving an input signal from a receiving transducer, wherein the input signal comprises at least a portion of the delayed output signal, and iteratively solving a Kalman filter problem as a function of the input signal, the output signal, and the delay to produce a first filtered input signal.