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7548741 Dual logarithmic amplifier phase-magnitude detector  
A power generation system including a RF power generator which provides a RF output power. The power distribution system includes a phase-magnitude detector module having a dual logarithmic...
7538558 Failure detection apparatus and failure detection method for a semiconductor apparatus  
A failure detection apparatus for a semiconductor apparatus includes a clock line to transmit a clock signal, a shield line to shield the clock line, an inverted signal setting unit to supply...
7439724 On-chip jitter measurement circuit  
An on-chip jitter measurement circuit and corresponding method are provided for receiving a reference clock and a signal of interest, including a latch for comparing the arrival time of the signal...
7375506 Device for comparing an input signal with a set value and correspondinng electronic circuit  
A comparison device includes a one-threshold comparator receiving an input signal and a set value and generating a resultant signal. The comparison device further includes a sampler for sampling...
7336084 Delay lock circuit having self-calibrating loop  
A delay lock circuit includes a measuring path, a forward path, and a feedback path. The measuring path samples a pulse with a reference signal in a measurement to obtain a measured delay. The...
7263153 Clock offset compensator  
A device communicates with a host and includes a transmitter, a receiver and a clock generator that generates a signal having a local clock frequency. A clock recovery circuit communicates with the...
7202656 Methods and structure for improved high-speed TDF testing using on-chip PLL  
Methods and structure for improved high-speed TDF testing using an on-chip PLL and associated logic to generate high speed launch and capture pulses. A reference clock may be applied to a PLL...
7110932 Method and circuit arrangement for regulating the operating voltage of a digital circuit  
A method and circuit arrangement for determining performance of a digital circuit to a critical degree by the transit time of signals of the longest signal path, also called the critical path....
7071676 Circuit configuration and method for measuring at least one operating parameter for an integrated circuit  
A circuit configuration for measuring at least one operating parameter for an integrated circuit includes an analysis circuit connected to at least one external connection on the integrated...
7019532 Device and method for error diagnosis at digital outputs of a control module  
A device for identifying a wire break between an electrical connection of a digital output and a load includes an evaluation module connected to the electrical connection and a voltage limiter...
7012418 Measuring system with ratiometric frequency output  
A measuring device, with a digital interface for the transmission of digital signals to an evaluation unit, is disclosed, whereby the interface includes a clock input, to which a system clock...
6759838 Phase-locked loop with dual-mode phase/frequency detection  
A phase-locked loop with dual-mode phase/frequency detection is provided. The phase-locked loop circuit includes a dual-mode phase/frequency detector, a loop filter, a voltage-controlled...
6735543 Method and apparatus for testing, characterizing and tuning a chip interface  
An inter-chip line transmission circuit in a transmitting chip and complementary receiving circuit in a receiving chip provide the capability to characterize the inter-chip interface by separately...
6639413 System and method for calibration of data in an electric power monitoring system  
The error compensating system and method is used in electric power monitoring systems, e.g. protective relays, and includes a test unit for applying a test signal to the front end of a data...
6538834 Servo controller and servo control method  
A servo controller for correcting a read position of a head when reading data recorded on a recording medium. In accordance with the amplitude ratio of data signals read from each segment of a...
6535049 Multipurpose test chip input/output circuit  
A system for testing an integrated circuit. The system includes a plurality of simultaneous switching output (SSO) cells with each of the plurality of simultaneous SSO cells including an output...
6528982 Jitter detector, phase difference detector and jitter detecting method  
A jitter detector obtains a phase difference between input signals as a digital value to make jitter between the signals easily detectable. The jitter detector includes comparison pulse generator,...
6479978 High-resolution measurement of phase shifts in high frequency phase modulators  
A phase difference to duty-cycle circuit converts a phase shifted signal and a reference signal into a single signal having a duty cycle that is a function of the phase difference between the two...
6448754 BIST method for testing cut-off frequency of low-pass filters  
A method and circuitry for implementing a built-in self test (BIST) for determining the frequency characteristics of filter circuits in mixed-signal integrated circuits (ICs). The method comprises...
6448757 Precise digital frequency detection  
A digital frequency detector ( 10 ) and method for digitally detecting arbitrarily small phase changes between a signal waveform and a reference waveform. Both the reference waveform and the signal...
6437589 Semiconductor device test circuit  
A system circuit constituting a semiconductor device (LSI) incorporates a test circuit for detecting a fault in the device. The test circuit comprises a plurality of flip-flop circuits. In this...
6400129 Apparatus for and method of detecting a delay fault in a phase-locked loop circuit  
There is provided a method and an apparatus for detecting a delay fault in a phase-locked loop circuit. A frequency impulse is applied to the PLL circuit under test as a reference clock, and a...
6356847 Method and device for determining the torque exerted on a rotating body which can be rotationally driven around a rotational axis  
The invention relates to a method and a device for determining the torque exerted on a body of revolution 2 capable of being driven rotatably about an axis of rotation 1 . The device possesses a...
6340883 Wide band IQ splitting apparatus and calibration method therefor with balanced amplitude and phase between I and Q  
The present invention provides a wide band IQ splitting apparatus suitable for using in a spectrum analyzer. A quadrature oscillator 30 generates a pair of quadrature signals. An amplitude and...
6313622 Power source voltage controller  
A power source voltage controller which can set the optimal margin for a replica circuit and shorten the time for the power source voltage to converge to the optimal value, having a replica circuit...
6291979 Apparatus for and method of detecting a delay fault  
There is provided a method of and an apparatus for detecting delay faults in phase-locked loop circuits. A frequency impulse is applied to a phase-locked loop circuit under test as the reference...
6291981 Automatic test equipment with narrow output pulses  
Automatic test equipment suitable for testing high speed semiconductor devices. The test equipment includes a formatter circuit with a flip flop that produces an output in the desired format even...
6233528 Method and device for signal testing  
A signal-testing device used with a tester for testing a first signal and a second signal includes a selected signal generator receiving first signal and second signal for generating a selected...
6057691 Delay element testing apparatus and integrated circuit having testing function for delay elements  
A delay element testing apparatus has a signal generator for generating a plurality of signals, at least one of which is variable in timing; a phase comparator for making a comparison of a...
6018318 Method and apparatus for determining the phase angle in position transmitters with sinusoidal output signals  
The method and apparatus for determining the phase angle in position transmitters with sinusoidal output signals utilizes a sensor that generates a sinusoidal signal U 0 (α)=A sin α and a...
6016080 Computer based fast phase difference measuring unit and PLL using same  
A system for measuring a phase difference between two input signals, including a computer performing computations in the complex domain and operating on two complex signals indicative of the two...
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...
5969254 Phase difference measuring apparatus and method  
A phase difference measuring apparatus obtains a first receive signal by transmitting and receiving a to-be-measured material in a reference state and a second receive signal by transmitting and...
5936430 Phase detection apparatus and method  
A phase detection apparatus produces a phase difference signal in response to the phase difference between two applied input signals. The phase detector includes a lead/lag indicator receiving the...
5903144 Circuit configuration for phase difference measurement  
A circuit configuration for measuring a phase difference between a reference signal and a clock signal includes a first shift register being clocked by the clock signal and having an input...
5808895 Method and apparatus for low signal to noise ratio instantaneous phase measurement  
The system and method of the present invention generates high resolution phase measurements without the high processing and memory overhead requirements found in prior art circuits and methods....
5789947 Phase comparator  
A phase comparator has a first comparing circuit and a second comparing circuit. The first comparing circuit produces a first output pulse having a duration equal to a phase lead of a first input...
5686835 Physical quantity detection device for converting a physical quantity into a corresponding time interval  
A magnetic detection device including at least one oscillator circuit having a magnetoresistance element which converts a change of magnetism detected into a digital signal and a comparator for...
5659242 Apparatus for comparing two waveforms in real time  
A numerical comparator is disclosed. The numerical comparator employs numerical techniques based upon the behavior of the cylinder unit to compare phasors in real time. In one application of this...
5646519 Digital phase detector employing a digitally controllable delay line  
A digital phase detector composed of: a digitally controllable signal delay device having a signal input, a signal output and a control input, the delay device being operative for conducting a...
5568071 Pulse phase difference encoding circuit  
A pulse phase difference encoding circuit provides a digital signal indicating a phase difference between a first input pulse and a second input pulse. The first input pulse is provided to and...
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...
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...
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...
5429002 Coriolis-type fluid mass flow rate measurement device and method employing a least-squares algorithm  
A Coriolis-type fluid flow rate measuring system splits a fluid flow that is to be measured into two equal half flows and passes the same respectively through two physically similar conduits which...
5412311 System for unambiguously determining the phase of an input signal of relative to a clock reference signal  
A clocked digital signal processing system includes apparatus for unambiguously indicating the phase of an input signal relative to a reference clock signal. In particular, the disclosed apparatus...
5381100 Pulse signal measuring instrument  
A pulse measuring instrument for measuring various pulse signal parameters such as the pulse width, the signal period of an input signal, and the time interval between input signals is capable of...
5373236 Highly accurate zero crossings for frequency determination  
The technique to measure the frequency very accurately for electronic warfare (EW) applications, and is simple in hardware, and which can accomplish this goal with a signal with real data (in...
5353019 Process for monitoring the output signals from a transmitting device  
By rectifying, comparing and X-OR gating two signals (A,B) from a transmitting device (G) that are to be sinusoidal and have a corresponding rotational frequency, of the same amplitude, and ideally...
5309111 Apparatus for measuring skew timing errors  
Apparatus for measuring skew in a clock signal for processing a video signal includes a cascade connection of a plurality of analog delay elements to which the clock signal is applied. The output...
Matches 1 - 50 out of 326 1 2 3 4 5 6 7 >