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| Number | Title | Issue Date |
| 8179148 | Information detecting apparatus and method Proposed is a highly reliable information detecting apparatus and method. In an information detecting apparatus and method for detecting transmission information a transmission signal in which a burst period of transmitting a burst signal and a space period as a no-... | 05/15/2012 |
| 7919968 | System and method for distortion analysis A method, circuit and system for determining at least one of an amplitude and a relative phase of a signal under test. A reference signal is generated based, at least in part, upon the at least one of the amplitude and the relative phase of the signal under test. Th... | 04/05/2011 |
| 7705609 | Phase frequency distortion measurement system Disclosed is a method of measuring frequency distortions characteristics of a device under test, the device configured convert an input signal in an input frequency range to an output signal in a different output frequency range. The method includes, for each test f... | 04/27/2010 |
| 7696761 | Spectrum analyzing method, distortion detector and distortion compensation amplifying device The invention provides a spectrum analyzing method, a distortion detector and a distortion compensation amplifying device for performing time/frequency conversion processing at high speed, and reducing a convergent time of a compensation coefficient. The distortion ... | 04/13/2010 |
| 7443173 | Systems and techniques for radio frequency noise cancellation Various embodiments for radio frequency (RF) noise cancellation are described. In one embodiment, an apparatus may comprise an RF noise cancellation system arranged to sense platform noise observed by a radio subsystem, create an inverse version of the sensed platfo... | 10/28/2008 |
| 7405574 | Signal detector A signal suppression filter (22) that inhibits high-frequency signals contained in power voltage and a signal separation filter (23) that prevents transmission of the high-frequency signals are provided in series on power lines (21A), (21... | 07/29/2008 |
| 7386070 | Hardware assisted adjacent channel leakage ratio measurement A tester module is used to perform an adjacent channel leakage ratio measurement. The tester module includes a translation block, a first filter, a re-sampler, a memory, a router, a second filter and a power detector. The translation block translates a received inte... | 06/10/2008 |
| RE40322 | Tests for non-linear distortion using digital signal processing A system for determining a composite signal level at which a signal path begins to generate non-linear distortion. A uses a reference test signal, which is preferably a short-duration burst of repeatable broadband energy, that is passed through the signal path and... | 05/20/2008 |
| 7373126 | Receiving apparatus The gain control signal generating unit generates a gain control signal, using a signal yielding the greatest level among signals of the respective signal processing units. The gain standardizing unit stores, in the offset storage units, offsets corresponding to gai... | 05/13/2008 |
| 7368876 | Plasma processing apparatus A low-cost plasma processing apparatus which permits reduction of the cost, as well as reduction of the loss of transmitted power. The plasma processing apparatus 1 has an apparatus main body 2 and auxiliary equipment 3. The auxiliary equipment ... | 05/06/2008 |
| 7362957 | Reproducing apparatus A reproducing apparatus, in which a reproduced information signal is equalized by an equalizer, includes a detecting circuit for detecting a digital signal from the reproduced information signal, and a controller for controlling an equalizing characteristic of the e... | 04/22/2008 |
| 7362800 | Auto-configured equalizer An signal communication device having an auto-configured equalizer. The signal communication device includes a scoping circuit, buffer circuit, select circuit and equalizing circuit. A test signal is transmitted to the signal communication device via a signal path. ... | 04/22/2008 |
| 7333051 | Methods and devices for determining the linearity of signals A method (for example, machine-implemented, e.g., via a receiver), for determining whether a transmitted pulsed-signal is a linear or non-linear frequency modulated (FM) signal, includes: iteratively determining upper and lower bound slopes associated with frequency... | 02/19/2008 |
| 7268530 | Method to measure the mutual phase relationship of a set of spectral components generated by a signal generator A novel method is described that enables the measurement of the phase of the spectral components generated by an harmonic phase reference generator without using a calibrated sampling oscilloscope. First one uses a vector network analyzer to measure the output refle... | 09/11/2007 |
| 7265557 | Method and circuit for measuring characteristic parameters of intermodulation distortion An arrangement is for measuring characteristic parameters of intermodulation distortion of a device under test. The arrangement may include a generator of at least two tones at different test frequencies, and an attenuation path feeding the device with a replica of ... | 09/04/2007 |
| 7259569 | Calibration circuit and method thereof A calibration circuit and method thereof. In the example method, a common-mode voltage may be detected at an output port of a mixer. At least one common-mode feedback voltage may be generated (e.g., at one or more common-mode feedback circuits) based on the detected... | 08/21/2007 |
| 7224746 | Pre-compensation for digital bit streams A technique for pre-compensating a digital bit stream for distortion imposed by a transmission path includes adjusting the level of the digital bit stream on a bit-by-bit basis in a manner that simulates the effects of a filter having a transfer function that is sub... | 05/29/2007 |
| 7221167 | Signal distortion measurement and assessment system and method The invention relates to an arrangement for measuring and assessing properties of a system (28) which transfers an electrical, mechanical or acoustical signal or converts an excitation signal x into another signal y. An error system (30) models the tra... | 05/22/2007 |
| 7218654 | Eye diagram improving method for laser transmitter A method for calibrating a laser transmitter includes (a) detecting an eye diagram of an output from the laser transmitter, (b) determining if the eye diagram is acceptable, (c) if the eye diagram is not acceptable, changing a value of a control signal in the laser ... | 05/15/2007 |
| 7218122 | Power disturbance generator An apparatus selectively generates a disturbance in a three-phase supply voltage provided to a load. The apparatus includes input connections for receiving a first phase voltage, a second phase voltage and a third phase voltage of the three-phase supply voltage. The... | 05/15/2007 |
| 7215162 | Start signal outputting circuit A start signal outputting circuit according to the invention has a differential RF/DC convertor part 100 for converting a high frequency power (RF) into a d.c. potential (DC). The RF/DC convertor part 100 is formed by two transistors QRD, Q | 05/08/2007 |
| 7212815 | Quality evaluation method The invention relates to a method for evaluating the quality of a signal transmission path (2) presenting non-linear distortions. According to said method a specified test signal is sent from a transmitter (1) to a receiver (3). First the level ... | 05/01/2007 |
| 7208955 | Power relay or switch contact tester Embodiments of the invention include a test circuit having an auxiliary low power test signal generator, filters, and a detector to test a power switch. The generator sends an auxiliary low power test signal having a different frequency than a power signal for the s... | 04/24/2007 |
| 7200825 | Methodology of quantification of transmission probability for minority carrier collection in a semiconductor chip A method for computer aided design of semiconductor chips which minimizes sensitivity to latchup is provided. The method evaluates electron transmission, reflection and absorption at geometric shapes that represent components of the semiconductor. ... | 04/03/2007 |
| 7177368 | Data transfer using frequency notching of radio-frequency signals A method for data transmission includes forming a notched radio-frequency (RF) burst according to one or more data values, where a bandwidth of the notched RF burst is at least two percent of the center frequency of the notched RF burst. Forming a notched RF pulse i... | 02/13/2007 |
| 7162207 | System, apparatus, method and computer program for producing signals for testing radio frequency communication devices A system, apparatuses, a method, and a computer program for producing signals for testing radio frequency communication devices are provided. The system comprises a non-real-time domain which includes a data generator for supplying a temporally discontinuous data st... | 01/09/2007 |
| 7151379 | Techniques to test transmitted signal integrity Briefly, a system that may facilitate system and line loop back diagnostic operations. In one possible implementation, a first transceiver may transmit test signals to a second transceiver. The second transceiver may include a transmitter with the capability to redu... | 12/19/2006 |
| 7146060 | Real-time correction of phase distortion A phase distortion device/method has been developed to improve images. A wave source generates waves, which stimulate the reflection and/or emission of narrow-band waves from an object of interest or a nearby object. The phase distortion of the narrow-band waves is ... | 12/05/2006 |
| 7116114 | Power supply noise measuring device According to one embodiment, a signal from a power supply line is caused to pass through a high pass filter, and a first signal is generated by adding a voltage-divided signal to the signal. In addition, a second signal obtained by adding the voltage-divided signal ... | 10/03/2006 |
| 7103112 | Transmit frequency domain equalizer A transmit processor that includes a transmit frequency domain equalizer (TX FEQ) that pre-compensates packets in the frequency domain to flatten transmit filter response to improve the spectral mask and reduce packet error rate (PER). The TX FEQ taps may be selecte... | 09/05/2006 |
| 7095007 | Method and apparatus for measurement of optical detector linearity A system for measuring optical detector linearity according to the present invention employs a laser source that illuminates an integrating sphere. The sphere randomizes the laser signal phase and produces a uniform intensity over the sphere output. A collimator exp... | 08/22/2006 |
| 7091781 | Wideband feed forward linear power amplifier A circuit is provided, having a feed forward linear power amplifier configured with two or more error correction loops (225–235, 255–265). Each of the error correction loops includes a band pass filter (237, 257). Each of the band pass filters (... | 08/15/2006 |
| 7030794 | System, method, and software for testing electrical devices A method according to a first aspect may include performing a first analog-to-digital (A/D) conversion using an A/D converter. Data associated with this first A/D conversion may be read using a processor. A command may then be issued from a processor when the readin... | 04/18/2006 |
| 6993089 | Digital modulator The present invention relates to a digital modulator (DM) and to an associated method of modulation. The digital modulator (DM) comprises a clock frequency (Fclk) and is able to process a digital signal (S(TA)) comprising symbols (SYMB) sampled at a symbol frequency... | 01/31/2006 |
| 6950764 | Arrangements to detect and respond to disturbances in electrical power systems A control arrangement and method is provided for detecting and responding to disturbances in electrical power systems. In a preferred arrangement, an integration is initiated that is based on a comparison of actual voltage of a source and a reference voltage. When t... | 09/27/2005 |
| 6947495 | Method for estimating and removing a time-varying DC-offset A method for estimating and removing a time varying DC-offset includes the steps of dividing the received burst into blocks (902), then finding the maximum and minimum values in each block (904). Once the maximums and minimum values have been found, th... | 09/20/2005 |
| 6947496 | Method for refining a DC-offset estimate and removing the DC-offset A method for refining a DC-Offset estimate and removing of the DC-Offset includes the step of determining if any AM is present (602). If AM is determined to be present, it is next determined if the I and Q path DC-Offset estimates are closely matched, if they... | 09/20/2005 |
| 6934655 | Method and apparatus for transmission line analysis A method and system for performing sequence time domain reflectometry to determine the location of line anomalies in a communication channel is disclosed. In one embodiment, the system generates a sequence signal and transmits the sequence signal over a channel that... | 08/23/2005 |
| 6919727 | Accurate time measurement system circuit and method Disclosed is a method of measuring the time signal of an electronic device including steps for measuring a true signal and an inverted signal. The measured true path signal and inverted path signal are combined to reduce measurement error and provide an accurate mea... | 07/19/2005 |
| 6898535 | Method and apparatus for decomposing signal jitter using multiple acquisitions A method and apparatus for analyzing jitter in a signal. The signal is buffered to form a sequence of signal vectors and a time interval error function is calculated for each the signal vector. A time interval error spectrum is then calculated by transforming the ti... | 05/24/2005 |
