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| Number | Title | Issue Date |
| 8072205 | Peak-to-average measurement with envelope pre-detection A peak-to-average measurement system includes an envelope detector to extract the modulation envelope of an input signal having a modulated carrier. The resulting baseband envelope signal is applied to a peak detector and an averaging circuit. In one embodiment, the... | 12/06/2011 |
| 7646191 | Method for detecting leading edge blanking parameter of power management chip A method for detecting a leading edge blanking parameter of a power management chip includes generating a pulse signal and inputting the pulse signal to the power management chip, wherein the amplitude of the pulse signal will cause a PWM signal of the power managem... | 01/12/2010 |
| 7466119 | Sensor circuit for detection of an abnormal offset voltage A sensor circuit includes an AC component pickup circuit and first and second adder circuits or first and second high-pass filters, and specifies a range of normal voltages by an upper-limit voltage formed by adding an upper-limit threshold value to the AC component... | 12/16/2008 |
| 7414387 | Waveform measuring apparatus and method thereof A waveform measuring apparatus includes: a digital filter for removing a large-amplitude changing component from an input signal and for outputting a resultant output signal with a small-amplitude noise component left therein; a window generating section for receivi... | 08/19/2008 |
| 7401001 | Position determining A position determining system for determining a position of a rotor of a rotating motor has sensors that are coupled to the rotor. The sensors generate, in response to a rotation of the rotor, a quadrature signal that has sine and cosine components. The position det... | 07/15/2008 |
| 7346464 | Gait waveform feature extracting method and individual identification system A gait waveform feature extracting method and an individual identification system extract features of the gait waveform. A one-step waveform corresponding to one step of a walking movement is specified using, as an index, a peak amplitude corresponding to a state wh... | 03/18/2008 |
| 7321810 | Method of dynamic economic dispatch Certain exemplary embodiments provide a method comprising: for an electrical power system comprising a plurality of committed electrical power generating units: for each of the committed electrical power generating units, obtaining an optimal power output temporal t... | 01/22/2008 |
| 7307411 | Method for signal extraction in a universal sensor IC A apparatus and method for creating a universally usable and configurable sensor platform which is used in conjunction with various sensor and sensing elements to sense and measure environmental conditions which incorporates inputs from multiple sensors 6-... | 12/11/2007 |
| 7295938 | Clock jitter calculation device, clock jitter calculation method, and clock jitter calculation program In a voltage drop analysis step S101, the process calculates a temporal variation of a power source voltage supplied to each cell along a transmission path of a clock signal. In a delay variation rate ratio calculation step S102, the process calculates... | 11/13/2007 |
| 7253600 | Constant slope ramp circuits for sample-data circuits A sample-data analog circuit includes a level-crossing detector. The level-crossing detector controls sampling switches to provide a precise sample of the output voltage when the level-crossing detector senses the predetermined level crossing of the input signal. A ... | 08/07/2007 |
| 7239122 | Multi-channel radiometer imaging system A radiometer system includes a housing and an RF board contained within the housing. Balanced radiometer channels receive an unknown signal and known reference. Each balanced radiometer channel includes at least one quadrature hybrid and amplifier circuit to provide... | 07/03/2007 |
| 7221139 | Multi-channel radiometer imaging system A radiometer system includes a housing and an RF board contained within the housing. Balanced radiometer channels receive an unknown signal and known reference. Each balanced radiometer channel includes at least one quadrature hybrid and amplifier circuit to provide... | 05/22/2007 |
| 7212930 | Method and apparatus for phase determination An electricity metering method and apparatus is provided for determining the phase of first waveform relative to a harmonically distorted, second waveform having cycles temporally distinguished by an occurrence of an amplitude that is neither zero amplitude nor a ma... | 05/01/2007 |
| 7199570 | Multi-channel radiometer imaging system A radiometer includes a housing and an RF board carried by the housing. A hybrid and amplifier circuit receives an unknown signal and a known reference signal. A switch receives signals as inputs from the hybrid and amplifier circuit and switches between the inputs.... | 04/03/2007 |
| 7184900 | Method of measuring a monophase voltage The present invention is related to a method for measuring the instantaneous value of a monophase AC voltage signal Ve, comprising the steps of: applying said voltage signal Ve to a first input of a phase comp... | 02/27/2007 |
| 7126320 | Evaluation of the characteristics of electric pulses A circuit for evaluating characteristics of duration and/or shape of an electric pulse induced in an element of an integrated circuit comprising an assembly of elements, each element being likely to receive an occasional external disturbance generating an electric p... | 10/24/2006 |
| 7110899 | Phase measurement in measuring device Methods and apparatus for determining the phase of a signal in a measurement device having a digital signal processor are described. The signal is digitised and the digitised signal, or a signal derived therefrom, is numerically correlated with a numerically generat... | 09/19/2006 |
| 7088086 | Multi-channel radiometer imaging system A radiometer includes a housing and an RF board carried by the housing. A hybrid and amplifier circuit receives an unknown signal and a known reference signal. A switch receives signals as inputs from the hybrid and amplifier circuit and switches between the inputs.... | 08/08/2006 |
| 7046014 | ATE measurement technique for comparator threshold voltage A system and a method for testing a comparator include generating two triangular waveform segments having the same period and different amplitudes, inputting the two triangular waveform segments into a comparator, receiving an output of the comparator, and calculati... | 05/16/2006 |
| 7034515 | Instantaneous voltage lowering detection device An instantaneous voltage dip detection device is provided with: all-pass filter (2) for phase shifting a supply voltage waveform (11) by 90°; a comparator 7 that outputs a signal when the supply voltage waveform (11) is smaller than a th... | 04/25/2006 |
| 7034516 | Multi-channel radiometer imaging system A radiometer system includes a housing and an RF board contained within the housing. Balanced radiometer channels receive an unknown signal and known reference. Each balanced radiometer channel includes at least one quadrature hybrid and amplifier circuit to provide... | 04/25/2006 |
| 7019509 | Digital envelope detector A digital envelope detector (consisting of both hardware and software) that provides accurate measurements of changes of peak values of an AC signal (these peak values constitute the envelope of a signal). Such accurate envelope measurements are required, e.g., to o... | 03/28/2006 |
| 6998835 | Electromagnetic sensor system and method An electromagnetic sensor system. The system includes an electromagnetic excitable structure that generates an acoustic signal when irradiated with electromagnetic energy; an acoustic energy transducer sensor for generating a first output signal that represents the ... | 02/14/2006 |
| 6937070 | Amplitude-detecting method and circuit Two all pass filters (11, 12) with 90° phase-shifted different center frequencies are employed to pass an alternating signal S with jitters in the period to generate signals S1 and S2, 90° phase-shifted from each other. A pulse generator (2... | 08/30/2005 |
| 6925415 | Method and system for measuring characteristics of liquid crystal display driver chips A measuring method and system for liquid crystal display driver chips applies a new method to measure voltages of driver chips, and utilizes probability and statistics for analysis and determination so as to yield a rather accurate effect even under noisy environmen... | 08/02/2005 |
| 6904269 | Signal type identification A method of identifying a signal type uses parameters of the signal as a basis for automatic identification. A signal of interest is selected from a display of a spectral waveform for a specified frequency. An occupied bandwidth for the signal of interest is estimat... | 06/07/2005 |
| 6867605 | Circuit for determining the internal resistance of a linear lambda probe A device for measuring the probe impedance of a linear lambda probe of an internal combustion engine which is caused by an AC current measurement signal which is fed into the lambda probe, comprises a voltage amplifier for amplifying an AC voltage which drops across... | 03/15/2005 |
| 6844715 | Synthetic RF detection system and method Outputs of a linear RF detector and a logarithmic RF detector are multiplexed individually to a single digitizer or simultaneously to a respective digitizers. A process generates a composite waveform from the resulting digitized data, either at a later time in the f... | 01/18/2005 |
| 6806721 | Digital envelope detector A digital envelope detector (consisting of both hardware and software) that provides accurate measurements of changes of peak values of an AC signal (these peak values constitute the envelope of a signal). Such accurate envelope measurements are required to optimize... | 10/19/2004 |
| 6628923 | Adaptive phase and amplitude linearization method and apparatus A apparatus for computing coefficient values for configuring a digital filter for compensating for non-linearity of an RF/IF device. The apparatus includes a reference signal generator, connected to an input of the RF/IF device, for generating an input re... | 09/30/2003 |
| 6570914 | Amplitude calculation circuit An amplitude calculation circuit is capable of permits accurate calculation of an amplitude with quite small circuit scale and power consumption. The amplitude calculation circuit converts input I (in-phase component) and Q(quadrature-phase component) bas... | 05/27/2003 |
| 6525518 | Method for measuring and controlling oscillations in a wind turbine A method for measuring and controlling oscillations in a wind turbine with the wind turbine control system using spectrum analysis, to determine the existence and amplitude of vibrations on the basis of existing sensor/transducer signals relating to the c... | 02/25/2003 |
| 6509728 | Spectrum analyzer having function of displaying amplitude probability distribution effectively A spectrum analyzer including a signal receiving and processing unit, a sampling unit, a histogram measuring unit, an arithmetic unit and a display unit. The signal receiving and processing unit receives an input signal according to the desired frequency ... | 01/21/2003 |
| 6369584 | Signal correction apparatus and signal correction method A signal correction apparatus includes: a measurement signal generator for generating a measurement signal; a reference signal generator for generating a reference signal; a signal processing section for processing the measurement signal and the reference... | 04/09/2002 |
| 6340891 | Method of diagnosing deterioration of the insulation of an electric power cable The diagnosis method of deterioration of electric power cable is that which diagnoses the deterioration accurately without a especial effort to reduce the harmonics in an electric power source equipment for test. Loss current component, which is obtained by re... | 01/22/2002 |
| 6313752 | System for displaying dynamic on-line operating conditions of an interconnected power transmission network A system for displaying dynamic on-line operating conditions of an interconnected power transmission network including components to monitor the interconnected power transmission network by measuring and correlating voltage magnitude and phase existing at... | 11/06/2001 |
| 6157183 | Two port handheld vector network analyzer with frequency monitor mode A two port handheld VNA enabling both reflection and transmission measurements to be made over a range of 25 MHz to 3.3 GHz frequency range. The handheld VNA includes a tracking synthesizer which generates a LO signal without a direct connection to a refe... | 12/05/2000 |
| 5847558 | Periodic signal analyzer using a randomly varied phase shifting circuit A signal sampling circuit receives a clock signal indicative of a sampling rate and a periodic input signal to produce a digitized sampled output signal. The sampled signal is applied to an all-pass filter having a single pole/zero pair in which the pole/... | 12/08/1998 |
| 5818238 | Apparatus for measuring current and other parameters of an electornic device in response to an applied voltage A first terminal of a device-under-measurement (DUM) is connected to the input of a buffer amplifier having its output applied to the inverting input of an operational amplifier through a resistor having the value "aR". A resistor having a value "R" is co... | 10/06/1998 |
| 5808462 | Apparatus for detecting the amplitude and phase of an a.c. signal An apparatus for detecting the amplitude and phase of an a.c. signal. The apparatus includes a signal detection circuit for detecting the a.c. signal, a signal splitting circuit for splitting the detected a.c. signal into first and second a.c. signals out... | 09/15/1998 |
