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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8169211 | Method for verifying the bandwidth and phase of a digital power control system A method for verifying the bandwidth and phase of a digital power control system according to the present invention includes steps of: A. Disturbance Order Reading in which an A/D conversion unit receives an analog signal order and mix it with existing command compo... | 05/01/2012 |
| 8085033 | Phase detector system A phase detection system (100) comprises an input terminal (101), first and second peak detectors (103, 113), an averaging unit (107), an offset unit (122), and a comparator (126). Input terminal (101) is coupled to t... | 12/27/2011 |
| 8013593 | Voltage measuring apparatus for semiconductor integrated circuit and voltage measuring system having the same A voltage measuring apparatus for a semiconductor integrated circuit includes a first delay unit configured to delay a reference clock in a first region, a second delay unit configured to delay the reference clock in a second region and an analysis unit configured t... | 09/06/2011 |
| 8013592 | Method and apparatus for detecting the phase wiring of an arbitrary unknown phase voltage relative to a reference phase voltage The technology relates to detecting the wiring phase of an unknown phase voltage relative to a reference phase voltage in an electric power distribution system having a polyphase power line. In order to reliably detect the wiring phase at the remote location relativ... | 09/06/2011 |
| 8004268 | Signal measuring device An interpolated signal generating circuit (101) generates interpolated signals (SIG1-SIGN) of two consecutive discrete signals (SIG). N measuring circuits (501) measure interpolated signals. Since the interpolated signals are meas... | 08/23/2011 |
| 7821249 | Phase difference measuring device and phase comparison circuit adjusting method A phase difference measuring device according to this invention has an object of shortening the measuring time, and includes a plurality of phase difference measuring circuits (104, 105, 106) formed in a row, and phase difference conversion circuits (101, ... | 10/26/2010 |
| 7808228 | Long range phasing voltmeter A long range wireless phasing voltmeter determines the phase difference between the time-varying voltage carried on a reference electrical conductor and another, field conductor. The voltage signal from the reference conductor is measured by a reference probe and co... | 10/05/2010 |
| 7772827 | Measuring device, in particular, a vectorial network analyzer with phase regulation A method for operating a measuring device, in particular, a vectorial network analyzer, which can be connected via at least two ports to a device under test, with excitation units assigned to each port, wherein each excitation unit provides a signal generator, with ... | 08/10/2010 |
| 7759927 | Test apparatus and testing method There is provided a test apparatus for testing a device-under-test, having a reference clock source for generating reference clock for controlling operations of the device-under-test, a clock regenerating circuit for generating, based on a phase adjusting signal to ... | 07/20/2010 |
| 7728576 | Programmable multi-channel amplitude and phase shifting circuit The traveling wave excitation system phase shifter chassis method and device of the invention is compact, inexpensive, and versatile when compared to customary methods for generating traveling wave excitation signals that would require using an equivalent number of ... | 06/01/2010 |
| 7701196 | Methods for detecting and classifying loads on AC lines Methods for detecting and classifying loads on alternating current (AC) lines are provided. One such method includes the steps of placing an AC field sensor in AC electric and magnetic fields generated by an AC line, generating an electric field signal representativ... | 04/20/2010 |
| 7656147 | Method and apparatus for measuring pulse widths of a side-band signal Example embodiments are directed to an apparatus and method for measuring a pulse width. A side-band signal generator may be configured to receive a given data pattern and output a side-band signal by modulating a pulse width of the received data pattern in a test m... | 02/02/2010 |
| 7638997 | Phase measurement apparatus There is provided a phase measurement apparatus for measuring a phase of a signal under measurement. The phase measurement apparatus includes a sampling section that samples the signal under measurement at timings indicated by a sampling clock supplied thereto, a ji... | 12/29/2009 |
| 7557561 | Electronic device, circuit and test apparatus There is provided an electronic device for receiving an input data signal and an input clock signal that indicates a timing to obtain the input data signal. The electronic device includes a first adjusting section that adjusts a phase difference between the input da... | 07/07/2009 |
| 7518353 | Vector network analysis system and method using offset stimulus signals A vector network analysis system and a method of measuring use offset stimulus signals to stimulate a balanced device under test (DUT) to determine performance parameters. The system includes an offset stimulus source that provides a plurality of stimulus signals an... | 04/14/2009 |
| 7511469 | Phase measurement device using inphase and quadrature components for phase estimation A phasemeter for estimating the phase of a signal. For multi-tone signals, multiple phase estimates may be provided. An embodiment includes components operating in the digital domain, where a sampled input signal is multiplied by cosine and sine terms to provide est... | 03/31/2009 |
| 7468601 | 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... | 12/23/2008 |
| 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 |
| 7414388 | Gain and phase detector having dual logarithmic amplifiers A gain-phase detector differentially processes the outputs from two logarithmic amplifiers to provide ratiometric gain measurement, thereby eliminating intercept as a parameter. Hard-limited outputs from the dual amplifiers are multiplied in a logarithmic scalable p... | 08/19/2008 |
| 7394239 | Method and circuit arrangement for the self-testing of a reference voltage in electronic components A method for the self-testing of a reference voltage in electronic components includes a circuit arrangement for a self-test of the reference voltage that can be implemented in the form of an on-chip test, eg., for which no external reference voltage source is requi... | 07/01/2008 |
| 7389449 | Edge selecting triggering circuit A triggering circuit asserts a trigger signal in response to edges of a digital signal conveying a repetitive pattern of edges. The triggering circuit generates first data having a value identifying a position within the pattern of a last occurring edge of the digit... | 06/17/2008 |
| 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 |
| 7355867 | Power supply for an electric meter having a high-voltage regulator that limits the voltage applied to certain components below the normal operating input voltage Disclosed is an invention relating to a power supply for use in an apparatus for measuring electrical energy, comprising, in one embodiment, a first switching device, a device for storing electrical charge in electrical connection with the first switching device, a ... | 04/08/2008 |
| 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 |
| 7352303 | Systems and methods for clock mode determination utilizing prioritization criteria A system for determining a data converter operating mode includes measurement circuitry that measures a master clock frequency of a master clock signal received without a modification in frequency from a master clock signal source and that measures a frequency ratio... | 04/01/2008 |
| 7352213 | Ac powered logic circuitry The use of an alternating current (ac) source to power logic circuitry can support satisfactory device performance for a variety of applications, while enhancing long-term stability of the circuitry. For example, when organic thin film transistor (OTFT)-based logic ... | 04/01/2008 |
| 7339365 | Phase detector and method of phase detection In order to provide a phase detector and a method of phase detection which are distinguished by greater sensitivity and simple implementability, at least one differential signal of two input signals (Ua; Ub) may be formed over at least one pred... | 03/04/2008 |
| 7339805 | Power supply having voltage blocking clamp A power supply comprises a rectifier, a transformer, a switching member, a controller and a voltage blocking clamp. A power supply can receive an alternating current (AC) input voltage having any magnitude within a wide range of AC input voltage magnitudes and can p... | 03/04/2008 |
| 7339984 | Method and apparatus for jitter measurement using phase and amplitude undersampling An apparatus and method for measuring jitter using phase and amplitude undersampling. A sampling circuit samples an input signal to obtain amplitude and phase information, a computation circuit determines Time Interval Error (TIE) information from the amplitude and ... | 03/04/2008 |
| 7323883 | Phase measurement device, method, program, and recording medium When a signal having two or more frequency components is fed to a circuit to be measured, a phase of the signal output from the circuit to be measured is measured. A phase measurement device measures an output when an input signal having two input frequency componen... | 01/29/2008 |
| 7310656 | Grounded emitter logarithmic circuit A logarithmically-responding circuit includes a differential-input amplifier that drives the control terminal of a three-terminal device that exhibits an exponential response in its output current. This arrangement allows the third terminal to be grounded. In a pref... | 12/18/2007 |
| 7295938 | Clock jitter calculation device, clock jitter calculation method, and clock jitter calculation program In a voltage drop analysis step S101, the process calculates a temporal variation of a power source voltage supplied to each cell along a transmission path of a clock signal. In a delay variation rate ratio calculation step S102, the process calculates... | 11/13/2007 |
| 7287200 | Jitter applying circuit and test apparatus There is provided a jitter application circuit for generating a clock signal containing a phase jitter component corresponding to given jitter data, having a PLL circuit for generating an oscillating signal corresponding to a given reference signal, a variable delay... | 10/23/2007 |
| 7286024 | Voltage-controlled oscillator with differential output A voltage-controlled oscillator for generating differential output is disclosed. The voltage-controlled oscillator comprises a Colpitts oscillator having a first inductor and a capacitive divider having at least two capacitors connected in series. A varactor is conn... | 10/23/2007 |
| 7245104 | Position-sensorless motor control device A position-sensorless motor control device has a superposer that superposes, on the drive current with which the motor is driven, a superposed current having a different frequency than the drive current, a superposed component extractor that extracts, from the motor... | 07/17/2007 |
| 7245151 | Logic circuitry powered by partially rectified AC waveform Logic circuitry is powered by a partially rectified alternating current (ac) waveform. The waveform is partially rectified in the sense that it does not provide a clean, primarily dc power signal. Instead, it is possible to power logic circuitry with a waveform that... | 07/17/2007 |
| 7242175 | Determining rotation of a freewheeling motor A device and method that determine a freewheeling rotation of an electric motor. The method includes steps of measuring first and second signals from respective first and second windings of an unenergized motor, and determining from the first and second signals whet... | 07/10/2007 |
| 7243272 | Testing of integrated circuit receivers A method for testing a data recovery circuit (DRC) includes disturbing a running variable in a closed control loop of the DRC, as the DRC is processing a received test signal. Data recovered by the DRC, while the DRC was affected by the disturbance, is evaluated. | 07/10/2007 |
| 7236555 | Method and apparatus for measuring jitter In a method for measuring jitter, a signal under test is inputted to generate signal transition locations. A signal transition location is latched using a sampling clock signal, and the signal transition location is converted to a delay value. The delay value is con... | 06/26/2007 |
| 7224140 | Method of stall detection for stepper motor system This invention detects a stall in a stepper motor by determining a motor winding current for each stepper pulse and determining if the winding current of a particular stepper pulse meets predetermined criteria. The motor winding current may be determined by measurin... | 05/29/2007 |
