| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 324620000 | Distortion | 15 |
| 20090015267 | 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. The reference signal is combined with the signal under test to generate a residual signal indicative of a distortion within the signal under test. The residual signal is measured. | 01-15-2009 |
| 20090128164 | PHASE FREQUENCY DISTORTION MEASUREMENT SYSTEM - Disclosed is a method of measuring frequency distortions characteristics of a device under test, said 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 frequency f | 05-21-2009 |
| 20100283482 | NON-DESTRUCTIVE SIGNAL PROPAGATION SYSTEM AND METHOD TO DETERMINE SUBSTRATE INTEGRITY - In various exemplary embodiments described herein, a system and associated method relate to non-destructive signal propagation to detect one or more defects in a substrate. The system can be built into a semiconductor process tool such as a substrate handling mechanism. The system comprises a transducer configured to convert one or more frequencies from an electrical signal into at least one mechanical pulse. The mechanical pulse is coupled to the substrate through the substrate handling mechanism. A plurality of sensors is positioned distal to the transducer and configured to be coupled, acoustically or mechanically, to the substrate. The plurality of distal sensors is further configured to detect both the mechanical pulse and any distortions to the pulse. A signal analyzer is coupled to the plurality of distal sensors to compare the detected pulse and any distortions to the pulse with a baseline response. | 11-11-2010 |
| 20100289501 | METHOD FOR CHARACTERIZING THE SENSITIVITY OF AN ELECTRONIC COMPONENT TO ENERGETIC INTERACTIONS - The behavior of a component subjected to pulsed laser radiation is measured. The polarization value, frequency, and temperature (or other operating conditions) to which the component is sensitive are determined by detecting a temporary or permanent fault in the operation of the component. If necessary, the parasitic currents generated are prevented from destroying the tested component at the time of testing. A susceptibility of the component to energetic interactions and the preferred operating conditions for the component are deduced. | 11-18-2010 |
| 20110148434 | 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. The reference signal is combined with the signal under test to generate a residual signal indicative of a distortion within the signal under test. The residual signal is measured. | 06-23-2011 |
| 20140070819 | Technique for Determining Performance Characteristics Of Electronic Devices And Systems - A technique for determining performance characteristics of electronic devices and systems is disclosed. In one embodiment, the technique is realized by measuring a first response on a first transmission line from a single pulse transmitted on the first transmission line, and then measuring a second response on the first transmission line from a single pulse transmitted on at least one second transmission line, wherein the at least one second transmission line is substantially adjacent to the first transmission line. The worst case bit sequences for transmission on the first transmission line and the at least one second transmission line are then determined based upon the first response and the second response for determining performance characteristics associated with the first transmission line. | 03-13-2014 |
| 20140184243 | ADAPTIVE DIGITAL DELAY LINE FOR CHARACTERIZATION OF CLOCK UNCERTAINTIES - An integrated circuit (IC) measures uncertainties in a first signal. The IC comprises a programmable delay circuit to introduce a programmable delay to the first signal to generate a first delayed signal. The IC further comprises a digital delay line (DDL) comprising a first delay chain of delay elements having input to receive the first delayed signal. The DDL further comprises a set of storage elements, each storage element having an input coupled to an output of a corresponding delay element of the first delay chain, and an output to provide a corresponding bit of a digital reading. The DDL additionally comprises a decoder to generate a digital signature from the digital reading and a controller to iteratively adjust the programmed delay of the programmable delay circuit to search for a failure in a resulting digital signature. | 07-03-2014 |
| 324621000 | Envelope delay | 1 |
| 20120112763 | Method for Detecting Small Delay Defects - System and method for effectively detecting small delay defects is disclosed. The method first loads layout information of an integrated circuit. Then, the nets and paths of the integrated circuit are partitioned into two groups based upon their physical information. The physical information comprises the length of each path and net and the number of vias at each path and net. A timing-aware automatic test pattern generator is configured to generate test patterns for the first group having paths and nets susceptible to small delay defects. A traditional transition delay fault test pattern generator is configured to generate test patterns for the second group. | 05-10-2012 |
| 324622000 | Phase | 2 |
| 20100141269 | METHOD AND APPARATUS TO MEASURE DIFFERENTIAL PHASE AND FREQUENCY MODULATION DISTORTIONS FOR AUDIO EQUIPMENT - A testing method or apparatus utilizes multiple frequencies applied to a device under test for measuring newly discovered frequency modulation effects. An embodiment may include a lower frequency signal with a smaller amplitude higher frequency signal to test a dynamic change in frequency response, gain, and or phase. This dynamic test can reveal frequency modulation effects. Another embodiment may include the use of a multiple frequency signal to dynamically induce a time varying phase or frequency distortion for the device that has differential phase distortion. The device's output is then measured with an FM detector or spectrum analysis system to measure a shift in one of the frequencies used in the test signal or to measure frequency modulation effects of any signals, including distortion products, from the device. Yet another embodiment of the invention may include biasing a device with a voltage to span the output voltage range of the device while measuring harmonic or intermodulation distortion or phase or frequency response at the various operating points. | 06-10-2010 |
| 20120182026 | CLOCK GENERATING APPARATUS, TEST APPARATUS AND CLOCK GENERATING METHOD - There is provided a clock generating apparatus for generating a recovered clock by recovering a clock from an edge of a received signal, including a recovered clock generating section that generates the recovered clock, a multi-strobe generating section that generates a plurality of strobes with different phases, in accordance with a pulse of the recovered clock, a detecting section that detects a position of an edge of the received signal relative to the strobes, by referring to values of the received signal obtained at respective timings of the strobes, and an adjusting section that adjusts a phase of the recovered clock, in accordance with the position of the edge of the received signal. | 07-19-2012 |
| 324623000 | Harmonic | 2 |
| 20090001996 | SYSTEMS AND METHODS TO EVALUATE PERMANENT MAGNET MOTORS - Methods and systems for evaluating a permanent magnet motor are provided. The method includes the steps of spinning a rotor of the permanent magnet motor; determining a total harmonic distortion of the permanent magnet motor; and comparing the determined total harmonic distortion of the permanent magnet motor with a baseline total harmonic distortion. | 01-01-2009 |
| 20100052699 | METHOD FOR INSTANTANEOUSLY DETERMINING RATES OF DISTORTION OF SIGNALS ON AN AC ELECTRICAL NETWORK, AND ASSOCIATED DEVICE - A method for instantaneously determining rates of distortion on variable frequency signals, and an associated device, in which a harmonic distortion rate is calculated across the shortest possible temporal window, corresponding to the duration of a period of a given signal's fundamental. Hence, the aim being to precisely determine the signal frequency value, whose HDR is to be calculated, an iteration of certain measurements, achieved at the time of a given calculation, is embodied in order to calculate the HDR on subsequent signals. | 03-04-2010 |
| 324624000 | Intermodulation | 3 |
| 20100156438 | SPECTRUM ANALYZERS WITH DYNAMIC RANGE INDICATOR AND METHODS OF USE - An apparatus for measuring spectral components of a signal is described. The apparatus comprises a measurement acquisition unit configured to receive an input signal and to provide a measurement trace. The apparatus also comprises a model module configured to model one or more of a phase noise from the apparatus, a broadband noise from the apparatus, and a third order intermodulation (TOI) product from the apparatus. The apparatus also comprises a display configured to show one or more of the phase noise from the apparatus, the broadband noise from the apparatus, and the TOI product from the apparatus. | 06-24-2010 |
| 20140049267 | NON-INTRUSIVE PASSIVE INTERMODULATION TESTING - A passive intermodulation test device includes a first signal generator that generates a first signal and a second signal generator that generates a second signal. A combiner combines the first signal and the second signal to generate a combined signal. A duplexer receives a test signal based, at least in part, on the combined signal and filters the first signal and the second signal from the test signal to generate an intermodulation signal. A variable low-noise amplifier amplifies the intermodulation signal in accordance with a variable gain based at least in part on a selected power level. A receiver, upon receipt of the intermodulation signal, measures intermodulation generated by a device under test. | 02-20-2014 |
| 20160033562 | VARIABLE PASSIVE INTERMODULATION LOAD - In one embodiment, the PIM load includes a variable attenuator; a detector configured to detect a signal characteristic associated with a signal received by the PIM load; and a controller configured to control the variable attenuator based on output from the detector. | 02-04-2016 |
