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Document Title |
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7505738 |
Broadband receiver
A broadband receiver exhibiting reduced interference to a frequency counter caused by a local oscillator. The broadband receiver is arranged for detecting a radio signal of strong reception...
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7495428 |
Pulse generator, timing generator, and pulse width adjusting method
The present invention provides, a pulse generator, which is configured so as to generate pulses with a predetermined pulse width, comprises: multiple pulsers each of which is configured so as to...
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7482827 |
Integrated circuit with testable clock circuits
An integrated circuit ( 1 ) that comprises an internal clock circuit ( 12 ) with a clock output for clocking functional circuits ( 10 ) of the integrated circuit ( 1 ). The integrated circuit is...
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7479777 |
Circuitry and method to measure a duty cycle of a clock signal
In some embodiments, a chip includes clock generation circuitry to create a clock signal, and reference signal oscillator circuitry to produce a reference signal with a higher frequency than the...
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7400130 |
Integrated circuit device
An integrated circuit device comprises internally on-chip an oscillator with a signal output. The device has a reference clock input, a first counter with a count input, a control input and a...
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7378854 |
Dual sine-wave time stamp method and apparatus
A time of an event can be determined by acquiring an amplitude, at the time of the event, of at least two periodic timing signals that are out of phase with each other. The time of the event within...
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7285946 |
Pattern trigger in a coherent timebase
A method and apparatus for acquiring a signal employing a coherent timebase are provided. The method comprises the steps of defining a pattern length count of a repetitive pattern in a signal to be...
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7250773 |
Circuit for detecting difference in capacitance
A circuit for detecting a difference in capacitance between a first capacitor and a second capacitor provided in a sensor includes an oscillator configured to generate an oscillating signal, a...
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6550036 |
Pre-conditioner for measuring high-speed time intervals over a low-bandwidth path
A pre-conditioner for enabling high-speed time interval measurements in an ATE system having a relatively low-bandwidth pathway between a UUT and a timer/counter includes a frequency divider and a...
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6486805 |
Frequency to digital converter
According to an embodiment of the present invention, an input signal is provided to an oscillator, which creates a count signal with a greater frequency than the input signal. The input signal...
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6483288 |
Engagement detection circuit
An engagement detection circuit for a clock recovery circuit consisting of a phase detector ( 3 ), a counter element ( 6 ) and a flip-flop ( 8 ). By employing a low-pass element ( 12 ) and a...
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6194918 |
Phase and frequency detector with high resolution
A phase detector for measuring phase differences between K input signals is provided. The phase detector includes a counter, K first registers and a first subtractor. Each first register receives...
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6005382 |
Output signal measuring apparatus for multiple frequency oscillator and output signal measuring and correcting methods thereof
An output signal measuring apparatus for a multiple frequency oscillator device and output signal measuring and correcting methods therefor which are capable of accurately and rapidly measuring a...
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6005381 |
Electrical signal phase detector
A circuit for detecting a predefined reoccurring phase point an periodic electrical signal has an input stage which rectifies the signal into first and second complementary signals. A Schmitt...
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5990673 |
Digital phase comparator
The phase difference of two periodic input signals having essentially the same frequency are measured in, for example, a communication system, in an accurate way with a high resolution and...
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5742198 |
Waveform shaping apparatus
An input voltage Va and a threshold voltage Vc are compared in a comparator 21 to shaping the waveform of a sensor signal. The period of the output signal of comparator 21 is measured by a period...
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5710710 |
Frequency counter with reduced false correlations
An improved frequency counter for more reliably reading the frequency of low level signals by employing a method of separating the desired signal from undesirable noise related signals, wherein the...
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5525899 |
Physical quantity change detection device which detects change by detecting a phase difference between two pulses
An object of the present invention is to provide an A/D conversion device capable of compensating for quantizing errors occurring as a result of variations in operating conditions and a physical...
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5504789 |
Phase detetion method for flow measurement and other applications
A phase angle difference between two alternating electrical signals is determined as a function of a ratio of a differential combination of two different numbers of pulse counts to an additive...
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5471402 |
Frequency counter
An improved frequency counter for detecting and distinguishing a main input signal from amplifier generated self-oscillating signals, wherein the frequency counter generally includes an input...
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5438599 |
Self-calibration timing circuit
A method and apparatus for a "self-calibration timing circuit" is utilized to dynamically compensate for inherent performance differences between individual semiconductor dice, and for a wide range...
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5438254 |
Phase difference measuring device
A phase difference measuring device includes a phase detector, a low-pass filter/voltage controlled oscillator, a reference signal selector for selecting either an internal reference signal or an...
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5345168 |
Burst-by-burst laser frequency monitor
A frequency monitoring system constructed of a rack mountable instrument for monitoring laser pulse frequency. The pulsed laser frequency is displayed on a linear bar-graph array composed of Light...
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4953095 |
Apparatus and method for measuring the frequency of a pulse signal
An apparatus for measuring the frequency of a pulse train signal and method therefor applicable to a speedometer of a vehicle are disclosed in which a count value C of at least one counter which...
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4949364 |
Count error detecting device for count type measuring instruments
A count error detecting device for count type measuring instruments is provided with a phase-shift circuit producing two N phase interpolation signals shifted in phase by 45° from two signals in...
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4929890 |
System for obtaining digital outputs from multiple transducers
A method and apparatus are disclosed for deriving digital signals from analog variations of different sensing elements in a transducer. Each sensing device controls the frequency of a variable...
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4928563 |
Electronic tuning apparatus for an electronic stringed musical instrument
In an electronic tuning apparatus used in electronic stringed instruments such as an electronic guitar, an electronic violin, and so on, at least one string is extended along the fingerboard. Prior...
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4882740 |
Frequency counter for counting a frequency and partly varied frequencies of a signal in real time
A frequency of a signal, particularly a frequency, partly varied as time passes, of a signal is counted in real time by producing a delay signal by delaying the signal as much as a predetermined...
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4859934 |
Apparatus for measuring the frequency of microwave signals
A microwave frequency detection receiver utilizing a prescaler comprised of one or a plurality of cascaded analog frequency dividers for down-converting received microwave signals to a...
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4849688 |
Detection of single-frequency signals
Apparatus for detecting a single-frequency signal having a predetermined frequency in an analog signal includes means for converting the analog signal to a differentially encoded digital signal and...
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4843328 |
Apparatus for using a time interval counter to measure frequency stability
Apparatus for measuring the relative stability of two signals is disclosed comprising means for mixing the two signals down to a beat note sine wave and for producing a beat note square wave whose...
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4835703 |
Method of compensating for noise and pulse pile-up in the counting of random pulse data
A method of counting a plurality of pulses representative of randomly occurring events includes the steps of counting the number of pulses, having an amplitude exceeding a first threshold...
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4806853 |
High accuracy frequency modulation waveform tester
The maximum and minimum depth of modulation of a carrier signal frequency modulated by a modulating sine wave is measured by a frequency counter responsive to an external gate. The external gate is...
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RE32845 |
Period and frequency measuring instrument
A device for determining with high accuracy the period and frequency of an input signal by taking into account the fractions of a clock signal that are normally ignored. A gate signal with an...
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4800508 |
Frequency detector
Method and apparatus for determining a frequency of a series of signals. A pulse train whose frequency is to be measured is counted. The time that the counting takes place is varied to coincide...
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4799020 |
Time variant frequency correction technique
A time variant frequency correction technique uses a frequency conversion circuit to obtain an intermediate frequency and an adjusted local oscillator frequency from an input signal frequency, a...
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4788646 |
Frequency-to-digital value converter
A converter for converting a variable data frequency which lies in a low frequency range whose upper limit is about 200 Hz to a corresponding digital value. The converter includes an electronic...
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4786861 |
Frequency counting apparatus and method
A device and method for measuring the frequency of an input signal by measuring the number of cycles of the input signal that occur in a sample interval between successive sampling times t n . An...
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4783622 |
Frequency abnormality detecting circuit
A frequency abnormality detecting circuit for detecting the frequency abnormality of an AC power source, comprises a waveform shaping circuit for shaping an output waveform (detection waveform) of...
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4760536 |
Autoranging frequency sensor
A signaling method and apparatus is described for obtaining a compact but high-resolution and wide-range digital representation of the frequency or period of an input signal. A reference frequency...
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4751576 |
Digital circuit for classifying the frequency of a signal in frequency ranges
The frequency of a signal is classified in at least two nonoverlapping frequency ranges using the variable frequency of a clock signal as a reference. The clock signal is applied to the count input...
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4740744 |
Digital signal processing apparatus for analog signals having wide frequency and dynamic ranges
A digital signal processing apparatus for operating upon analog signals having wide dynamic and frequency ranges is described. The invention includes a digital section and an analog section, the...
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4737942 |
Time measuring device
A time measuring device uses a clock pulse signal whose period is successively increased after a predetermined number of pulses is produced. The clock pulse signal is counted from the time when the...
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4731768 |
Autoranging time stamp circuit
A time stamp circuit comprises a plurality of counter programmable logic arrays for providing a Gray code count. Each count provided by the counters is associated as a time value with a specified...
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4695791 |
Auto ranging of a frequency measuring instrument
An auto ranging system for causing an instrument for determining the frequency of a wave to be in a frequency mode or a period mode in response to the digits of the frequency of the wave determined...
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4680540 |
Device for measuring average frequencies
A synchronizing gate signal is generated in synchronism with an input signal or a clock signal, and first and second gates are opened by the synchronizing gate signal. The input signal having...
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4675597 |
Circuit analyzer for measuring pulse repetition rate and pulse width
A circuit analyzer includes a time base generator and a counter driven by pulses of the generator for the measurement of pulse width. The generator is responsive to leading and trailing edges of a...
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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...
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4670712 |
Frequency measurement method and device
For measuring the frequency of a sine shaped signal accompanied by noise, for example Gaussian noise, in an input signal, that input signal is applied to two measuring arms, possibly after...
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4651089 |
Frequency counting arrangement
A method and apparatus for determining the frequency of an input signal. The input signal and a sampling signal having a sampling frequency f s to a sampling mixer to produce a first intermediate...
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