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| Number | Title | Issue Date |
| 7999531 | Phase detecting apparatus, test apparatus and adjusting method Provided is a phase detecting apparatus that detects a phase difference between signals, comprising a phase comparing section that sequentially delays a second input signal relative to a first input signal, according to a set value, and that compares a phase of the ... | 08/16/2011 |
| 7759926 | Dynamic phase offset measurement In one embodiment, a method is provided for measuring a dynamic phase offset between a PLL's input clock and the PLL's feedback input clock, wherein the input clock is spread spectrum modulated in a spread spectrum mode and is not modulated in a static mode. The met... | 07/20/2010 |
| 7750619 | Method and apparatus for measuring the frequency of a received signal A method of measuring the frequency of a received signal comprising the steps of: generating a first phase signal by digitising the phase of the received signal; delaying the first phase signal by a predetermined amount to generate a second phase signal; calculating... | 07/06/2010 |
| 7710103 | Preventing false locks in a system that communicates with an implanted wireless sensor The present invention determines the resonant frequency of a wireless sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with ... | 05/04/2010 |
| 7710102 | Clock test apparatus and method for semiconductor integrated circuit A clock test apparatus for a semiconductor integrated circuit includes a delay unit configured to delay an internal clock signal. A comparison unit compares the phase of an output signal of the delay unit with the phase of a reference clock signal. A phase discrimin... | 05/04/2010 |
| 7504818 | Rotation phase angle measuring device, and control-protecting devices of electric power system using the same The rotation phase angle measuring device measures a voltage instantaneous value of an electric power system in a period of 1/(4 N) of one period of a reference wave and integrates voltage amplitude of a squared value of the voltage instantaneous value in arbitrary ... | 03/17/2009 |
| 7492144 | Preventing false locks in a system that communicates with an implanted wireless sensor The present invention determines the resonant frequency of a wireless sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with ... | 02/17/2009 |
| 7443251 | Digital phase and frequency detector Disclosed are a digital phase-frequency detector and a method of operating a digital phase-frequency detector. The detector includes an input circuit, an output circuit and a reset circuit. In use, the input circuit receives first and second input signals during a p... | 10/28/2008 |
| 7414438 | Clock based voltage deviation detector The clock based voltage deviation detector of the present invention includes a pulse module, an indicator module and a correlation module. The pulse module generates a stream of reset pulses as a function of a clock signal. The indicator module generates a pass/fail... | 08/19/2008 |
| 7372246 | Phase identification system and method A system and method for determining the relative phase between current-carrying conductors. A reference unit samples and digitizes a voltage waveform at a reference location and transmits the digitized voltage waveform. A field sampling unit is placed on or directly... | 05/13/2008 |
| 7355379 | Coaxial type impedance matching device and impedance detecting method for plasma generation A plasma generating method generates plasma in a treating chamber by controlling a high-frequency generating unit to generate a high-frequency signal and by feeding the high-frequency signal to the treating chamber through an impedance matching device. The plasma ge... | 04/08/2008 |
| 7339366 | Directional coupler for a accurate power detection A power detection system implemented using a pair of directional couplers and a transmission line (or equivalent) disposed between the directional couplers, wherein the transmission line (or equivalent) provides a 90° phase shift between the directional couplers. A... | 03/04/2008 |
| 7327015 | Semiconductor device package A semiconductor device package includes a semiconductor device mounted to a substrate, a wall erected around the semiconductor device with a height taller than the height of the semiconductor device, at least one metal member provided in the wall or against the wall... | 02/05/2008 |
| 7305892 | Method for operating a mass flowmeter A method is disclosed for operating a mass flowmeter that employs the Coriolis principle and that incorporates a measuring tube through which flows a fluid medium, which measuring tube is stimulated to oscillate in a predefined pattern, allowing the resulting oscill... | 12/11/2007 |
| 7279938 | Delay chain integrated circuits having binary-weighted delay chain units with built-in phase comparators therein Delay-locked loop integrated circuits include a delay chain having a plurality of delay chain units. The delay chain may be a binary-weighted delay chain and the delay chain units may be arranged in ascending or descending order (e.g., x1, x2, x4, x8, . . . ) accord... | 10/09/2007 |
| 7271563 | Apparatus for controlling operation of reciprocating compressor, and method therefor The present invention discloses an apparatus for controlling an operation of a reciprocating compressor and a method therefor which can reduce errors in an operation of a stroke estimated value of the reciprocating compressor, by previously preventing over-saturatio... | 09/18/2007 |
| 7272527 | Method of test of clock generation circuit in electronic device, and electronic device In an electronic device having an interface circuit which operates using a fast clock source, frequency deviation of the clock source is inspected in the mounted state. The clock pulses of the fast clock source are counted in synchronization with an electronic devic... | 09/18/2007 |
| 7268530 | Method to measure the mutual phase relationship of a set of spectral components generated by a signal generator A novel method is described that enables the measurement of the phase of the spectral components generated by an harmonic phase reference generator without using a calibrated sampling oscilloscope. First one uses a vector network analyzer to measure the output refle... | 09/11/2007 |
| 7245117 | Communicating with implanted wireless sensor The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low dut... | 07/17/2007 |
| 7227346 | Two channel digital phase detector The invention is directed to a digital phase detector that comprises a splitter and phase shifter to receive a signal of a device under test and produce a first signal that is substantially identical to the received signal and a second signal that is phase shifted r... | 06/05/2007 |
| 7203126 | Integrated circuit systems and devices having high precision digital delay lines therein An integrated circuit delay device includes a digital delay line configured to provide a percent-of-clock period delay to a timing signal received at an input thereof, in response to a control signal. This control signal has a value that specifies a length of the de... | 04/10/2007 |
| 7167093 | Method of steering capacitor fields for use in capacitive sensing security systems The present invention provides a capacitive sensing apparatus having utility in object detection security applications whereby the object detection field generated by the apparatus is made steerable. The apparatus includes a power source having a ground connection i... | 01/23/2007 |
| 7167514 | Processing of quinary data A FIR filter in a Gigabit transceiver in which data words are represented in three bits: SIGN representing word sign, SHIFT representing requirement for a shift operation, and ZERO indicating whether the word is zero. An AND gate ANDs an input coefficient and the ZE... | 01/23/2007 |
| 7126324 | Precision digital phase meter A method of measuring phase includes receiving an analog signal; converting the analog signal into a digital signal; representing the digital signal as N sets of samples; aligning the N sets of samples to a common time frame; removing zero bias drift from the digita... | 10/24/2006 |
| 7119591 | Delay-locked loop (DLL) integrated circuits having binary-weighted delay chain units with built-in phase comparators that support efficient phase locking Delay-locked loop integrated circuits include a delay chain having a plurality of delay chain units. The delay chain may be a binary-weighted delay chain and the delay chain units may be arranged in ascending or descending order (e.g., x1, x2, x4, x8, . . . ) accord... | 10/10/2006 |
| 7109760 | Delay-locked loop (DLL) integrated circuits that support efficient phase locking of clock signals having non-unity duty cycles Delay-locked loop (DLL) integrated circuits include digital phase comparators that are unaffected by variable duty cycle ratios. These phase comparators determine a shortest direction to phase lock before establishing a value of a compare signal (COMP) that specifie... | 09/19/2006 |
| 7065455 | Correcting frequency in flowtube measurements Techniques are described for accurately measuring a density or other parameter of a fluid traveling through a vibratable conduit, using a flowmeter. The techniques involve obtaining measurements of a frequency of vibration of the conduit, as a function of a phase di... | 06/20/2006 |
| 7024319 | Device for determining and/or monitoring a process parameter A device for determining and/or monitoring a physical or chemical process variable, with at least one electrical, electronic and/or programmable electronic component, which fulfills at least one safety-relevant protective function, wherein the safety-relevant protec... | 04/04/2006 |
| 6995552 | Voltage modulator circuit to control light emission for non-invasive timing measurements An apparatus accurately measures the time difference between two signal edges by optically detecting the emission from a “beacon device” that is modulated as a function of time difference. Through the use of this modulation it is possible to perform timing measu... | 02/07/2006 |
| 6975951 | Meter apparatus and method for phase angle compensation employing linear interpolation of digital signals A method compensates for phase differences between sampled values of first and second AC waveforms. The method employs a phase angle compensation factor and sequentially samples a plurality of values of each of the waveforms. For a positive compensation factor, seco... | 12/13/2005 |
| 6972553 | Sensor readout circuit A sensor readout circuit which provides a frequency signal output including a phase detector circuit responsive to an output signal from a sensor and an input signal to the sensor and configured to detect the phase difference between the input signal and the output ... | 12/06/2005 |
| 6969984 | Direct phase and frequency demodulation The present invention, generally speaking, provides a time shift angle demodulator that is of simple construction and has an extended linear range. Range extension is achieved by using the input signals directly, not simply post-processing the S-PFD outputs. In acco... | 11/29/2005 |
| 6944070 | Integrated circuit devices having high precision digital delay lines therein Integrated circuit delay devices include a digital delay line that is configured to provide a percent-of-clock period delay to a timing signal accepted at an enabled one of a plurality of injection ports thereof. The digital delay line may be responsive to an inject... | 09/13/2005 |
| 6930462 | Apparatus and method for controlling operation of compressor In an apparatus and a method for controlling operation of a compressor, by removing deviation generated by resistance and inductance and removing an error in a stroke estimation value of a compressor, operation of the compressor can be accurately controlled. The app... | 08/16/2005 |
| 6914439 | Capacitive test point voltage and phasing detector Method and apparatus for accurately determining the presence of voltage at capacitive test points and for determining the phase angle relationship between two capacitive points. The detection of the presence of the voltage at the capacitive test points is independen... | 07/05/2005 |
| 6909270 | Phase detector capable of detecting an accumulated value of phase displacement at a high speed and frequency stability measuring apparatus for arbitrary nominal frequency using the same A phase region detector receives in-phase signal I representing in-phase component and quadrature signal Q representing quadrature component of a first signal and second signal respectively, equally divides an angle range of 2 π into a plurality M of three or more ... | 06/21/2005 |
| 6876186 | Measurement of circuit delay Method and apparatus for determining delay of a circuit. A clock signal is provided to a variable delay and then to the circuit. The clock signal obtained from the circuit is provided to a data register, such as a flip-flop, as a clock input. The clock signal is pro... | 04/05/2005 |
| 6868135 | Method and apparatus for correcting for a phase shift between a transmitter and a receiver A method and apparatus for correcting for a phase shift between a transmitter and receiver comprising the steps of: a) transmitting a signal from a transmitter (14); b) receiving the transmitted signal (1... | 03/15/2005 |
| 6864672 | High resolution phase frequency detectors An inexpensive and reliable, high resolution digital phase detector for timing circuits for wireless, optical or wire-line transmission systems. In particular this invention allows using size limited clock counters for measurements of unlimited time ranges by combin... | 03/08/2005 |
| 6859027 | Device and method for measuring jitter in phase locked loops A device and method for measuring the jitters of phase locked loop signals. A phase lead or phase lag relationship between an input signal and an output signal of a phase locked loop is found. According to the phase relationship and using multiplexers, a first phase... | 02/22/2005 |
