Class 324/76.16 - With counter

Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter including a device capable of changing stages
No. of patents: 39
Last issue date: 04/20/2010

Number	Title	Issue Date
7701193	Pulse height analyser A pulse height analyzer for determination of the pulse height distribution of electronic pulses includes a set of comparators with a common input for analogue to digital conversion of the electronic pulses, a set of latches wherein the inputs of the latches are conn...	04/20/2010
7355537	Built-in self-test apparatus and method for digital-to-analog converter A built-in self-test apparatus for a digital-to-analog converter uses a differentiation unit for differentiating a digital-to-analog (DA) signal to obtain the differences between pulses of the analog signal. Next, the analog signal is converted into a digital signal...	04/08/2008
7271579	AC signal level detection circuit An AC voltage generated by an AC power source 1 is rectified by a full-wave rectifying circuit 2, which generates a rectified voltage. An internal regulator 33 performs waveform shaping of the rectified voltage. A comparator 42 compares t...	09/18/2007
7196891	Control circuit for frequency converter A control circuit for a frequency converter is provided. The control circuit includes a switch circuit, a timer switch, a starter circuit, a starter relay, and a timer relay. The control circuit is capable of keeping the frequency converter on for a predetermined ti...	03/27/2007
7122988	Rotation drive device and rotation drive method This rotation driving apparatus includes a torque generating circuit 72 for generating a torque of a servo motor 30 with voltage supply from a power source 71 and a motor control circuit 73 for controlling rotation of the motor. In the to...	10/17/2006
7015705	Capacitance detection apparatus A capacitance detection apparatus includes a first open/close switch provided between both ends of a standard capacitor, one end of the standard capacitor being connected to a first voltage source, a second open/close switch provided between one end of a first capac...	03/21/2006
6963194	Analog signal measuring device and method An analog signal measuring device for measuring an analog signal includes a digital controller, a waveform converter and a comparator. The digital controller includes a PWM controller for outputting a pulse signal having an adjustable pulse width to the waveform con...	11/08/2005
6856924	Mixer-based timebase for sampling multiple input signal references asynchronous to each other Sampling is performed. A strobe signal is generated from a first signal. Multiple sampled signals are sampled using the strobe signal. Each of the multiple sampled signals is synchronous with its own clock reference and each of clock references are asynchronous with...	02/15/2005
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
6788044	Frequency change measuring device A frequency change measuring device includes frequency divider for frequency dividing a measuring signal to produce frequency-divided signals, first counter for counting the frequency-divides signals to calculate frequency-division numbers, frequency division number...	09/07/2004
6703848	Digitally controlled adaptive driver for sensing capacitive load A digitally controlled adaptive driver and method for sensing a capacitive load are included. The driver comprises a load sensing circuit for sensing a voltage of an output terminal of the driver connected to a load and for generating a control signal in ...	03/09/2004
6670800	Timing variation measurements Measuring timing variations in a periodic signal includes producing trigger signals in an integrated circuit in response an externally-generated periodic signal. First and second oscillation signals are generated in response to the trigger signals. A firs...	12/30/2003
6573696	Evaluation method for a particle counter and device for carrying out said method In an evaluation method for a particle counter, a detector generates a signal in response to the presence of particles in a measuring area in which a liquid flow is conveyed. The sensor signal is treated by a signal processing device and is converted into...	06/03/2003
6456096	Monolithically compatible impedance measurement A monolithic sensor includes a reference channel and at least one sensing channel. Each sensing channel has an oscillator and a counter driven by the oscillator. The reference channel and the at least one sensing channel being formed integrally with a sub...	09/24/2002
5637994	Waveform measurement The characteristics of an a.c. waveform are determined by measuring the time interval between the instant when the waveform crosses a first reference threshold and the instant when it crosses another threshold. The second threshold is varied to obtain a s...	06/10/1997
5491722	Eye pattern margin measurement and receiver stress detection device A system and method are provided wherein binary communications signals are received, and sequences of values of like types of these, such as positive ones, positive zeroes, negative ones, and negative zeroes, are observed. Responsive to a sequence of like...	02/13/1996
5025207	Method for the measurement of a steady level in a noise-infested signal and automatic measuring device for the application of this method The disclosure concerns automatic measuring stands. The automatic measurement of the amplitude of an intermodulation line at the output of a TV transmitter is difficult to achieve because this line is often drowned in a cloud of noise formed by the spectr...	06/18/1991
4837503	Remote measurement of high voltage AC with radar The invention concerns an apparatus and technique for detecting the voltage of A.C. high voltage lines. A radar wave is transmitted towards the high voltage lines and is reflected to a detector when the AC voltage drops to threshold level. Reflection cont...	06/06/1989
4795970	Electrical apparatus Apparatus for measuring frequency includes a first period measuring counter (14) arranged to measure a periodic signal and generate a counter enable signal an integer number of cycles long, and a second period measuring counter (15) arranged to measure fr...	01/03/1989
4774682	Nonlinear statistical signal processor A signal processor is for receiving an input signal y. The input signal y has in it a signal x and has a conditional density function, given that the signal x is present, p(y\|x). The signal processor includes a memory for storing the amplitude-density-fun...	09/27/1988
4670711	High-speed transient pulse height counter A pulse height counter for counting the number of excursions of an incoming analog signal through each of a plurality of amplitude ranges. The pulse height counter automatically records not only the number of excursions through each amplitude level, but a...	06/02/1987
4616173	Frequency counter A frequency counter employs a temperature sensitive oscillator mounted in proximity to a master crystal oscillator to provide an output frequency which varies appreciably with changes in ambient temperature and the frequency of the temperature sensitive o...	10/07/1986
4563637	System for measuring amplitude of noise-contaminated periodic signal In order to measure the amplitude of a periodic signal of known frequency which may be heavily contaminated by noise and whose phase is not known at the point of measurement, e.g. at an output end of an optical fiber, two samples are periodically taken in...	01/07/1986
4539518	Signal generator for digital spectrum analyzer A signal generator generates a test signal for input to a device under test the output signal of which is subjected to fast Fourier transform analysis by a fast Fourier transformer. A waveform memory is read out in synchronism with data input to the fast ...	09/03/1985
4492917	Display device for displaying audio signal levels and characters A level display device for audio signal comprises a plurality of bandpass filters having filtering bands of respectively different center frequencies, for band-dividing and filtering an input signal supplied thereto through an input terminal, a level indi...	01/08/1985
4365193	Overvoltage-pulse analyzer A system for measuring and storing the amplitudes plus duration and/or rise times of overvoltage pulses occurring on a transmission line comprises a voltage divider working into a first and a second comparator respectively detecting an abnormal voltage ex...	12/21/1982
4348637	Pulse width spectrum analyzer Each incoming pulse has its width determined and is stored in a designated torage counter in accordance with its pulse width. The contents of the storage counters are serially addressed and the value of each counter is obtained. The value of each counter i...	09/07/1982
4301405	Interval-to-rate converter A pulse interval to pulse rate converter for use in a portable, battery-powered, hand-held test instrument useful for evaluating the performance of a pulse generator such as a cardiac pacer or the like. A pulse generator being tested generates output puls...	11/17/1981
4301404	Methods and apparatus for analyzing periodic waveforms A waveform to be analyzed is repetitively sampled at corresponding instants in each of several cycles, and the samples from each cycle for a respective instant summed to derive an average value for that instant in one cycle of the waveform. The average va...	11/17/1981
4224569	Display stabilization circuit A stabilized display for electronic instruments that make voltage measurements, frequency measurements, and the like is disclosed. This stabilized display includes a counter, a register, a comparator, and control logic. The counter generates counts, durin...	09/23/1980
4142146	Digital apparatus for waveform measurement Digital instrumentation for waveform measurement including method and apparatus for providing irregularly spaced sampling times to prevent misleading visual patterns of coordinate points due to the presence of signal frequencies above the Nyquist frequenc...	02/27/1979
4103230	Apparatus for analyzing electrical signals of variable amplitude An electrical signal analyzing circuit for manually controlling the durational sequencing of an integrator circuit for providing visual readout of test signal divergence and maximum peak voltage levels. The integrator circuit is first time delay activatab...	07/25/1978
4097798	Oscilloscope sweep rate indicator system A system for indicating the sweep rate of an oscilloscope time base. A counter is enabled by a sweep gate signal to permit clock pulses having a predetermined repetition rate to be counted during the time a sweep-driving ramp waveform is generated. The co...	06/27/1978
4084245	Arrangement for statistical signal analysis An arrangement for signal analysis in which the function to be examined is split into its spectral components in a filter bank. The signal values of the individual components are successively applied to a comparison device and to the input of a store. The...	04/11/1978
4054786	Running average computer A special purpose digital computer requiring minimal data storage capabil for continually calculating the numerical average of a predetermined number of sampled data values. The average In + 1 is calculated according to the equation: ##EQ...	10/18/1977
4053831	Waveform analysis system An address counter sequentially addresses locations in a shift register or random access memory in which a waveform is stored in digital form to display the waveform on a cathode ray tube. Several magnification ranges are provided so that a selected porti...	10/11/1977
4041386	Multifunctional circuit analyzer A multifunctional circuit analyzer is disclosed which is capable of determining the complete signature of an unknown electrical signal. The circuit analyzer utilizes a high and low peak detection circuit and an analog to digital converter to determine the...	08/09/1977
4031463	Power brown-out detector Apparatus for computing an approximation of a running average of the peak voltage of an AC power wave. If this average drops below a predetermined level a brownout signal indicating potential failure of electronic units powered by the AC wave is generated...	06/21/1977
3932737	Spectrum analyzer establishing a nonlinear frequency distribution of power-density spectra Precalculated samples of a power-density spectrum, taken at equispaced frequencies, are converted into modified samples with a nonlinear (e.g. logarithmic) distribution by being selectively weighted with the aid of several groups of coefficients defining ...	01/13/1976

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Class 324/76.16 - With counter