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| Number | Title | Issue Date |
| 8134356 | Operating an integrated circuit at a minimum supply voltage In one embodiment, an integrated circuit comprises at least one measurement unit configured to generate an output indicative of a supply voltage at which the integrated circuit is operable for a given operating frequency and a control unit coupled to receive the out... | 03/13/2012 |
| 8129980 | AC electric quantity measuring device In the present invention, a measured realtime accurate frequency is used to determine estimated instantaneous voltage/current time-series data for each phase component in accordance with the least-squares method. The estimated instantaneous voltage/current time-seri... | 03/06/2012 |
| 7812592 | Method of monitoring a photovoltaic generator The subject matter of the present invention is a method for monitoring a photovoltaic generator (1) for generating current with a number of solar cells connected between two external connections by repeated feeding of a current with a frequency spectrum into ... | 10/12/2010 |
| 7804289 | Testing device including low-pass filter with automatically switching function A testing device including low-pass filter with automatically switching function is disclosed in the present invention, comprising: a control circuit used to control the operation of the testing device and provide a reference frequency (Fr); a frequency detection ci... | 09/28/2010 |
| 7710101 | Method and system for measuring maximum operating frequency and corresponding duty cycle for an I/O cell A circuit for measuring maximum operating frequency and its corresponding duty cycle for an input I/O cell implementation under test (IUT) includes a condition checking module, a central control module and a duty cycle measurement module. The condition checking modu... | 05/04/2010 |
| 7696741 | System and method for adaptively determining the transition rate of a quantized signal An adaptive measurement system measures a transition rate associated with an output of a device. An input signal that is characteristic of the output of the device is received by an input signal-to-frequency converter, which changes state based upon a characteristic... | 04/13/2010 |
| 7443253 | Detection device for detecting oscillator A detection device for detecting an oscillator is provided. The detection device includes an oscillator control circuit, a frequency-decreasing circuit and a display circuit. The oscillator control circuit is used for outputting the oscillator signal of the oscillat... | 10/28/2008 |
| 7332916 | On-chip signal waveform measurement apparatus for measuring signal waveforms at detection points on IC chip An on-chip signal waveform measurement apparatus mounted on an IC chip measures signal waveforms at detection points on the IC chip. A reference voltage generator successively generates reference voltages different from each other based on a predetermined timing sig... | 02/19/2008 |
| 7313491 | Method and apparatus for high-precision measurement of frequency A method and apparatus for measuring the frequency of a cyclically-repeating electrical signal by: passing the electrical signal through a network of sequentially-activated gates, in which the first gate detects the leading edge of each cycle of the electrical signa... | 12/25/2007 |
| 7304470 | Fan operating status monitoring system A fan operating status monitoring system includes a detecting module to detect pulsation currents generated by the rotation of a fan, and further convert the detected pulsation currents to voltage signals, thereby allowing a differential magnifying module, a first p... | 12/04/2007 |
| 7208934 | Apparatus for identification of locations of a circuit within an integrated circuit having low speed performance A test circuit for identification of locations with low speed performance. A grid of ring oscillator units and switches connect or disconnect the ring oscillator units to or from each other, such that the locations with low speed performance are identified according... | 04/24/2007 |
| 7161257 | Active anti-islanding system and method An engine control system suited for use with an engine that outputs electrical power to a local load and is electrically connected to an electrical grid. The engine control system includes a set point control operable to set an engine power output value and a sensor... | 01/09/2007 |
| 7123000 | Adjacent channel leakage power ratio measuring apparatus, channel power measuring apparatus method, program, and recording medium with recording the program The frequency of an adjacent channel signal is reduced by a down converter (12), wherein the signal (adjacent channel signal) in a predetermined band centered around the adjacent channel frequency passes through a band-pass filter (22). At this time, a... | 10/17/2006 |
| 7113879 | Using vector network analyzer for aligning of time domain data A method of using a vector network analyzer (VNA) for coordinated Voltage Standing-Wave Ratio (VSWR) and Time Domain Reflectometry (TDR) measurement includes configuring the VNA for identifying discontinuities correlated to a VSWR lobe. In some embodiments, the meth... | 09/26/2006 |
| 7092828 | Method for detecting communication impulses of a fan motor and circuit arrangement for carrying out said method A method for detecting commutation pulses of a fan motor with continuous measurement and storage of voltage values that are proportional to the fan current within predetermined time intervals. The measured voltage values are continuously evaluated by comparing two m... | 08/15/2006 |
| 7050778 | Direct conversion turner A direct conversion tuner down-converts television signals, cable signals, or other signals directly from an RF frequency to an IF frequency and/or baseband, without an intermediate up-conversion step for image rejection. The direct conversion tuner includes a pre-s... | 05/23/2006 |
| 7046001 | Frequency measuring device, polishing device using the same and eddy current sensor A frequency measuring device capable of accurately detecting an end point of polishing a semiconductor wafer by obtaining a frequency measurement result highly accurately in a short period of time. A device FC, which measures the frequency of a measured signal compr... | 05/16/2006 |
| 7045913 | Microturbine engine system A microturbine engine that includes a compressor that is operable to provide a flow of compressed air. The compressed air flows through a recuperator where it is preheated before delivery to a combustor. The preheated compressed air mixes with a fuel and is combuste... | 05/16/2006 |
| 7006078 | Apparatus and method for sensing the degree and touch strength of a human body on a sensor An improvement in sensor for detecting contact with a human resistive element is disclosed. This design uses additional components to avoid discharging capacitors through the human resistive element, thereby sparing the user the uncomfortable sensation associated th... | 02/28/2006 |
| 6979994 | Power supply device for a component testing installation A power supply device for an installation for testing electronic components. The power supply device includes a first, high-frequency, supply source, a second, low-frequency, supply source, and a control module. The first, high-frequency, supply source includes a hi... | 12/27/2005 |
| 6980915 | Phase noise compensation for spectral measurements A system and method compensate for phase noise of a spectrum analyzer based on an established model of the phase noise that accommodates a variety of operating states of the spectrum analyzer. The model is used to form an array that is applied to extract an output s... | 12/27/2005 |
| 6949959 | Method for converting electric signals and a converter therefor The invention relates to signal conversion devices to be used for the receiving radio devices. The attained technical result is the detection and conversion of signals in an electrical two-terminal device, a data loss level being minimal. A converting element is sup... | 09/27/2005 |
| 6943711 | Frequency-digital signal conversion circuit There is provided a frequency-digital signal conversion circuit for automatically converting a clock frequency into a digital signal. The frequency-digital signal conversion circuit includes: a frequency detecting unit for detecting a frequency of an input clock sig... | 09/13/2005 |
| 6922066 | Sampler and method of measuring a waveform of a current with jitters reduced In a sampler for use in measuring a waveform of an electric signal, a measurement target current is given as the electric signal to a sampler chip 11 and is also used to produce a trigger current Itr for determining measurement timing on the sampler chip. A c... | 07/26/2005 |
| 6917191 | Frequency measurement circuit A frequency measurement circuit measures a frequency of an input signal. The frequency measurement circuit includes a frequency measurement unit for counting a reference clock during a counting period having a predetermined number of waves of the input signal. The f... | 07/12/2005 |
| 6891361 | Automatic gain control (AGC) loop for characterizing continuous-time or discrete-time circuitry gain response across frequency The present invention is a method, system, and product for testing operating characteristics of a continuous-time or discrete-time device under test, which is included within a circuit. The operating characteristics of the continuous-time or discrete-time device are... | 05/10/2005 |
| 6774614 | Method and apparatus for detecting current An apparatus for detecting currents in a three-phase power transmission system includes a first detection circuit electrically coupled to a first phase of the three-phase transmission system, a second detection circuit electrically coupled to a second phase of the t... | 08/10/2004 |
| 6768294 | Low cost detection technique This invention discloses circuitry for signal measurement including a signal input, a microprocessor, and an oscillator, the oscillator being operable to generate a pulse signal, the frequency of which is a function of amplitude of a first signal received at the sig... | 07/27/2004 |
| 6768293 | Displaying signal measurements within multiple ranges of a parameter Measurements are obtained of a signal within each one of multiple ranges of a parameter. For each range a representative measurement value is derived together with the extent of the range. A respective graphical display element is defined for each range of the param... | 07/27/2004 |
| 6731101 | Modulation semiconductor integrated circuit device and testing method for oscillation circuit In accomplishing an LC-oscillation VCO circuit which is immune to frequency deviation and a frequency-hopping radio communication apparatus using the VCO circuit, a modulation semiconductor integrated circuit device is designed to control the LC-oscillation VCO dire... | 05/04/2004 |
| 6724178 | Measuring composite distortion using a coherent multicarrier signal generator A method for measuring composite distortion levels using a coherent multicarrier RF signal generator having incrementally related frequencies is disclosed. The invention provides for the use of a coherent multicarrier signal generator that permits arbitrary RF carri... | 04/20/2004 |
| 6717394 | Method and apparatus for determining frequency of an alternating current signal of an electric power system A protective relay determines frequency of an AC signal of an electric power system. The protective relay includes a circuit measuring the AC signal period between zero crossings to provide a measured period value. A microprocessor includes a random access memory ha... | 04/06/2004 |
| 6690153 | Method of testing and/or monitoring the system frequency of a microcontroller and a microcontroller A method of testing and/or monitoring the system frequency of a microcontroller, in which the working frequency of a voltage-regulated oscillator or VCO, which is in an operative connection with the microcontroller, is measured, and the system frequency b... | 02/10/2004 |
| 6677577 | Waveform measuring method and apparatus A common reference signal is applied from the same reference signal generating portion to a reference signal input terminal of a signal under test generator and a reference signal input terminal of a sampling signal generator circuit. A sampling frequency... | 01/13/2004 |
| 6674277 | Frequency measurement circuit A frequency measurement circuit comprises a plurality of frequency measurement units 10, 20, K0 each of which counts a reference clock Cb during a counting period having a predetermined number of waves of an input signal Cin, each of the frequency measure... | 01/06/2004 |
| 6665367 | Embedded frequency counter with flexible configuration An integrated circuit according to the present invention includes application-specific circuitry and an embedded counter assembly capable of measuring the frequency of one or more clock signals, which may be generated internally by the integrated circuit ... | 12/16/2003 |
| 6633826 | Signal-identifying circuit arrangement The circuit arrangement serves to identify an input signal (s1) assigned to a predetermined signal class. It comprises signal-matching electronics (1) responsive to a current component and/or a voltage component of the input signal (s1) and providing a co... | 10/14/2003 |
| 6630820 | Method and apparatus for measuring the instantaneous frequency of FM signals A method and an apparatus for measuring the instantaneous frequency of FM modulated signals, includes sampling, instantaneous frequency computing, and lowpass filtering. FM modulated signal are sampled at prescribed intervals to provide digitized FM signa... | 10/07/2003 |
| 6614216 | System and method for intersample timing error reduction A system clock for a system for measuring at least one given quantity having a value which does not vary significantly from a given frequency, the system clock comprises a controller for sampling said given quantity at a rate determined by an oscillator f... | 09/02/2003 |
| 6603298 | System for estimating the frequency of the power signal on a power transmission line The system obtains the three phase voltages on the power line VA, VB and VC, either from a local primary or local alternative source. The selected local source voltages are then applied through switches, respectively, whic... | 08/05/2003 |
