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Patent Searching and Data


Matches 101 - 150 out of 2,047

Document Document Title
WO/1995/006854A2
A magnetic flowmeter comprises a first electric circuit (6) providing a first alternating electrical signal generated mostly by an electromagnetic interaction between an alternating magnetic field and the velocity of an electrically cond...  
WO/1995/006260A1
A transmitting box (101) is connected to a first electrical outlet in a building. The phase of the first electrical outlet is used as the reference phase. The transmitter box senses each of the zero-cross-overs of the reference phase and...  
WO/1994/011744A1
This invention gives a very precise and simple digital circuitry as well as basis for software to measure the phase difference between harmonic components of any of two of the input signals. The apparatus may be used also for measuring t...  
WO/1994/003818A1
A method and apparatus for rapidly and continuously sampling AC voltage and current signals in a plurality of power distribution circuits. The sampled signals are then analyzed in a sine board computer to derive the number of fundamental...  
WO/1991/014329A1
An electrical circuit for producing a digital value which is representative of instantaneous phase of an electrical input signal relative to a reference frequency signal. The circuit includes a digital counter for continuously generating...  
WO/1991/008493A2
Method and device for comparing analog signals by transformation of analog signals into binary logic signals, detection of zero crossings by means of comparators (30), and providing a correlation signal by means of a logical circuit (32)...  
WO/1991/005422A1
A phase-detector circuit for a phase-locked loop clock recovery system detects the phase difference between an information signal and a clock signal and produces a phase error signal representative of the phase difference. The phase dete...  
WO/1990/015482A1
A digital phase detector (500) for providing an output (520) characterized by the phase difference of a first input signal (175) and a second input signal (275) is provided. The phase detector comprises a first (200) and a second (300) d...  
WO/1990/013040A1
The invention relates to a method and an apparatus for accurate digital determination of the time or phase position of a signal pulse train in relation to a fixed time or frequency reference. The arrangement generates and produces direct...  
WO/1989/009450A1
A method and apparatus for evaluating the performance of a device, such as a quadrature encoder (14), wich generates at least two electrical wave train signals (10, 11), each varying between first and second states and the two normally b...  
WO/1989/001634A1
A method for measuring channel-to-channel skew or phase difference in an electronic system of the type having a plurality of input channels which are sampled by sampling pulses having a frequency fo and a period Po. The sampling pulses a...  
WO/1988/010432A1
A method for removing phase errors from RF signals generated by movement of the cable interconnecting a network analyzer (22) and a device under test (14). The method includes the steps of measuring (30) the phase difference between inci...  
WO/1988/009938A1
A method and apparatus of deriving a directional polar diagram from the signals R received by a synthetic-aperture aerial (in direction-finding applications), or P from such an aerial (in radio-beacon applications), these signals includi...  
WO/1988/005543A1
A system (Fig. 3) and method for detecting an abnormality in a network (10) for distributing or transmitting electric power at a predetermined fundamental frequency. The system produces a signal (40) representing the fundamental frequenc...  
WO/1988/002867A1
The invention relates mainly to a phase measuring device. The use of adapted filters (140) makes it possible to increase the signal/noise ratio of a received signal. Nevertheless, if a plurality of signal samples having each a different ...  
WO/1987/003097A1
A phase-frequency discriminator comprising a first RS latch coupled to provide first output signals, said first RS latch including an S input terminal coupled to receive first input signals; a second RS latch coupled to provide second ou...  
WO/1986/006174A1
An apparatus for measuring the signal level of a signal to be measured is provided with a reference signal oscillator, a variable local signal oscillator, a heterodyne-type mixer, a band-pass filter, and means for automatically correctin...  
WO/1986/002722A1
A device for measuring the flow velocity of a liquid in a conduit, comprising two ultrasonic transducers and an electronic circuit arrangement, in which each one of the two transducers concurrently transmits a burst to the other transduc...  
WO/1982/003276A1
A power transducer (Fig. 2) of a variety utilizing time division multiplication and configured under a principle of operation incorporating an integrator stage (51). Phase adjustment for the transducer is provided by a network (56) which...  
WO/1982/002987A1
A phase detector circuit (10) has low offsets and is easily made as a bipolar integrated circuit. A first input (11) to the phase detector controls a transistor (14) which in turn controls a current source (17). The output of the current...  
JP2014157161A  
JP2014519220A  
JP2014139541A  
JP5559142B2  
JP5488875B2  
JP5470677B2  
JP5464704B2  
JP5389311B2  
JP2013250231A
To quickly and highly accurately detect a phase difference between two AC signals.A phase difference operation part calculates a phase difference φr(=φ2-φ1) of two detected voltages v1(phase angle φ1), v2(phase angle φ2). After oper...  
JP5322391B2  
JP2013205147A
To provide a phase display unit capable of easily indicating a phase difference between three-phase AC currents at two points.The phase display unit indicates a phase difference of the phases corresponding to each other at the two points...  
JP2013195222A
To calculate an effective value and a phase difference of an AC signal easily.When an AC voltage and an AC signal are detected and then filter sections 51 and 52 extract a fundamental wave component, arithmetic processing in the filter s...  
JP2013190301A
To provide a phase detector capable of stably detecting a phase.A phase detector 10 comprises an oscillation circuit 9 that oscillates a phase θi to be synchronized with an AC system voltage V1, generates a waveform V2 with a phase φ o...  
JP2013167500A
To accurately detect a phase of an input signal while reducing influence of unbalanced components and harmonic components.A phase detection device 10 comprises: a fundamental wave orthogonal component calculator 10A that includes a three...  
JP5268969B2  
JP5255930B2  
JP5217075B2  
JP5214163B2  
JP5188449B2  
JP5181427B2  
JP2013053929A
To provide a phase-contrast measurement system capable of accurately measuring a phase contrast by improving a way of processing by a Lissajous method.A phase-contrast measurement system 1 comprises: an A/D converter 7 that applies A/D c...  
JP5165712B2  
JP5154594B2  
JP5119291B2  
JP5103840B2  
JP5103710B2  
JP5092490B2  
JP5076730B2  
JP2012211896A
To provide a method of determining at least one parameter (frequency, phase angle, amplitude) of a sinusoidal signal generated by a power grid.The frequency of the signal is determined iteratively based on a linear relationship among the...  
JP5055016B2  

Matches 101 - 150 out of 2,047