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| Number | Title | Issue Date |
| 8026713 | State detection device for detecting operation state of high-frequency heating apparatus An operating state detection technique is provided which makes it possible to accurately detect an abnormality of a high-frequency heating apparatus. An anode current detected by the anode current detection resistor 40 of a magnetron is inputted into the A/D ... | 09/27/2011 |
| 7982452 | Detection of a load state of a half-bridge Disclosed is a method for diagnosing a half-bridge having a first and a second switching element. The method includes providing a half-bridge that has a first and a second switching element connected in series with each other. The first and the second switching elem... | 07/19/2011 |
| 7960966 | State detection device for detecting operation state of high-frequency heating apparatus An operating state detection technique is provided which makes it possible to accurately detect an abnormality of a high-frequency heating apparatus. An anode current detected by the anode current detection resistor 40 of a magnetron is inputted into the A/D ... | 06/14/2011 |
| 7928720 | Power conversion efficiency measurement system and method A system measures power conversion efficiency of a voltage regulator. A measurement setting module presets a maximum output current and a total measurement number, and calculates each target output current of the voltage regulator. A load adjustment module adjusts a... | 04/19/2011 |
| 7863887 | State detection device for detecting abnormal operation of a high-frequency magnetron heating apparatus A device utilizing an operating state detection technique is provided which makes it possible to accurately detect an abnormality of a high-frequency heating apparatus. ... | 01/04/2011 |
| 7808230 | Voltage detection device and voltage detection method A voltage detection device that is connected to a DC circuit to which a DC voltage is applied and that detects the DC voltage applied to the DC circuit comprises a voltage conversion means for outputting a first voltage that increases as the DC voltage increases and... | 10/05/2010 |
| 7795859 | Low cost millimeter wave imager Low cost millimeter wave imagers using two-dimensional focal plane arrays based on backward tunneling diode (BTD) detectors. Two-dimensional focal arrays of BTD detectors are used as focal plane arrays in imagers. High responsivity of BTD detectors near zero bias re... | 09/14/2010 |
| 7786720 | Passive mixer power detector method and apparatus The power level of an RF signal is detected using a circuit having relatively low DC offset, high dynamic range, small frequency and temperature dependence and low flicker noise. According to one embodiment, the power detector circuit comprises a chain of amplifiers... | 08/31/2010 |
| 7746057 | Power meter having complex quadrature output current and voltage filters A power meter having complex quadrature output current and voltage filters provides power measurements in high amplitude and frequency variation and/or high jitter environments without requiring high computational overhead. A pair of filters, one for voltage and one... | 06/29/2010 |
| 7714566 | Clamp-on current and voltage module for a power monitoring system A clamp-on current and voltage module for an electrical power monitoring system that monitors characteristics of power distributed through one or more power conductors includes a current transformer having a core divided into at least two parts so that the core can ... | 05/11/2010 |
| 7633286 | Electric current monitoring device An electric current monitoring device is provided to be used in conjunction with a measuring instrument that converts a physical quantity measured thereby to a signal current and outputs the signal current to a two-wire transmission line. The electric current monito... | 12/15/2009 |
| 7609050 | Method and system for determing current in an electrical component in a power conversion system A method and system for determining a current flowing through an electrical component are provided. A switch electrically coupled to the electrical component and two voltage sources is activated. The activation of the switch causes current to flow through the electr... | 10/27/2009 |
| 7583074 | Low cost millimeter wave imager Low cost millimeter wave imagers using two-dimensional focal plane arrays based on backward tunneling diode (BTD) detectors. Two-dimensional focal arrays of BTD detectors are used as focal plane arrays in imagers. High responsivity of BTD detectors near zero bias re... | 09/01/2009 |
| 7414389 | Low-power battery pack with hall-effect sensor Some embodiments of a method and apparatus to facilitate battery management using a hall-effect sensor. The apparatus includes a hall-effect sensor and a battery management unit. The hall-effect sensor is disposed near the electrical transmission line to detect an a... | 08/19/2008 |
| 7337433 | System and method for power profiling of tasks Systems and methods for improved power profiling of embedded applications are presented. These inventions provide the ability to measure the power consumption of an embedded application at the task level as the application is executing on the target hardware. Method... | 02/26/2008 |
| 7336462 | Alternator and starter tester protection apparatus and method An method and apparatus testing an alternator and/or starter assembly including a power source for energizing the alternator and/or starter, a computer processor for monitoring electrical current supplied to energize the alternator and/or starter wherein the compute... | 02/26/2008 |
| 7330033 | Noncontact sensor A noncontact voltage sensor is housed in a container comprising a container body having an opening on one side and an insulation cover body for sealing the opening. A plate type electrode insulated from a ground is housed in the container. The cover body side is opp... | 02/12/2008 |
| 7300041 | Vertical alternator holding apparatus and method for alternator testing An apparatus for supporting an alternator for testing uses a supporting pin mounted to extend in a first direction relative to the alternator. A first holding pin extends in a second direction relative to the alternator, and has two ends with a first end having a bo... | 11/27/2007 |
| 7239125 | Method and apparatus for electronic meter testing An electronic energy meter senses input voltage and current signals and processes the input voltage and current signals to generate measurements of multiple types of power. The meter comprises a processing system for selecting one of the multiple types of power and ... | 07/03/2007 |
| 7212911 | Alternator and starter tester apparatus and method An alternator and starter tester system is provided that includes a protective hood or cover, a controller connecting an LCD touch-screen, an alternator main harness connector, a starter harness self-test connector, a barcode connector, USB host and USB function con... | 05/01/2007 |
| 7203883 | Integrated circuit An integrated semiconductor memory, which can be operated in a normal operating state and a test operating state, includes a current pulse circuit with an input terminal for applying an input signal. The current pulse circuit is connected to an output terminal via a... | 04/10/2007 |
| 7145321 | Current sensor with magnetic toroid A current sensor for sensing current in a primary source, including a primary conductor forming at least one winding on a first portion of a toroid formed from a magnetic material. A secondary source of electrical current from a signal forms a plurality of winding o... | 12/05/2006 |
| 7026966 | Digital-to-analog converter comprising an integrated test circuit In a digital-to-analog converter including an integrated test circuit, a digital input and an analog output, a comparator (5) capable of being connected with the analog output (4) and including a connection (7) for a reference voltage source, a ... | 04/11/2006 |
| 6954061 | Method and apparatus for electronic meter testing An electronic energy meter senses input voltage and current signals and processes the input voltage and current signals to generate measurements of multiple types of power. The meter comprises a processing system for selecting one of the multiple types of power and ... | 10/11/2005 |
| 6856924 | Mixer-based timebase for sampling multiple input signal references asynchronous to each other Sampling is performed. A strobe signal is generated from a first signal. Multiple sampled signals are sampled using the strobe signal. Each of the multiple sampled signals is synchronous with its own clock reference and each of clock references are asynchronous with... | 02/15/2005 |
| 6642706 | Detection of asymmetrical load in an AC circuit A circuit for detecting if a load supplied with a high frequency AC power source is asymmetrical. The input voltage and a DC blocking voltage are connected to a differential amplifier circuit, and any difference in voltage is signaled. The load voltage an... | 11/04/2003 |
| 6614356 | Digital meter for use of current and voltage The present invention relates to a digital meter for use of the current and voltage, including a front end signal processing device, a press button input device, a central processing unit (CPU), an LCD controller, an LCD, and an alarm device. When the sig... | 09/02/2003 |
| 6590379 | Apparatus for detecting the envelope of an input signal An envelope detector for detecting the envelope of an input signal. The envelope detector includes an inverter for inverting the input signal and two offsetting circuits for offsetting the input signal and the inverted input signal so as to align the peak... | 07/08/2003 |
| 6566857 | Testing of digital-to-analog converters A technique for testing digital-to-analog converters includes providing a set of digital input signals to the digital-to-analog converters and comparing a resulting combined output signal from the digital-to-analog converters to a comparison value. A dete... | 05/20/2003 |
| 6512360 | Self-induction-type stroke sensor Within a body, a sensor member, which has one end supported in a cantilever fashion adjacent a predetermined end of the body and has the other end extending into a space of the body, includes a coil section having a plurality of coil segments that are exc... | 01/28/2003 |
| 6489786 | Non-isolated type voltage sensor A non-isolated type voltage sensor is provided between a battery of less than 60 V and a circuit having a resistor, an end of which is connected to a wire harness while another end is connected to a reference power supply. The non-isolated type voltage se... | 12/03/2002 |
| 6469491 | Apparatus and method for measuring DC load current of a switching power supply Current measurement apparatus and methods are disclosed to measure load DC output current on the secondary side of a high frequency transformer in a switched power supply. Current in the primary side of the transformer is detected with a current transform... | 10/22/2002 |
| 6456057 | Universal booster amplifier for a coriolis flowmeter A universal booster amplifier for a Coriolis flowmeter. The booster amplifier receives drive signals from a flowmeter electronics and extends conditioned drive signals to a driver for flow tubes of flowmeter sensor. The booster amplifier includes phase sh... | 09/24/2002 |
| 6316943 | Signal generator Apparatus is described for generating a frequency-sweepable measurement signal and a local signal with a frequency separated from the measurement signal frequency by an intermediate frequency. The measurement signal and a local signal are generated by a s... | 11/13/2001 |
| 6275021 | Electricity meter The invention relates to an electricity meter with signal channels that are passed to a digital signal processing device and each of which has a multiplexer with downstream analog/digital converter. Voltage signals of an electrical consumer can be connect... | 08/14/2001 |
| 6121768 | D.C.-D.C.-type bidirectional voltage converters and current sensor A bidirectional current sensor including a transformer having a primary winding arranged in a circuit likely to be run through by a current to be measured, a secondary winding, an impedance for demagnetizing the transformer, and a measuring resistor conne... | 09/19/2000 |
| 6028425 | Signal generator Apparatus is described for generating a frequency-sweepable measurement signal and a local signal with a frequency separated from the measurement signal frequency by an intermediate frequency. The measurement signal and a local signal are generated by a s... | 02/22/2000 |
| 5764048 | Ultra high accuracy voltage measurement system An ultra high accuracy voltage measurement system utilizes a Josephson junction voltage generator whose voltage is controlled by a high precision frequency. The voltage measurement system to measure an input DC voltage incudes: a microwave oscillator whic... | 06/09/1998 |
| 5666048 | Technique and apparatus for measuring a direct current flowing through a conductor at high voltage A technique and circuit for measuring direct current flowing through a conductor at a high voltage employs a capacitor connected in series with the conductor, and a neon lamp connected in parallel with the capacitor. The series connected capacitor and con... | 09/09/1997 |
| 5627718 | Apparatus providing protection and metering in an ac electrical system utilizing a multi-function sampling technique A circuit interrupter samples waveforms in a protected circuit by taking samples in pairs spaced 90 electrical degrees apart. The sum of the squares of samples in each pair, which is representative of the RMS value of the fundamental frequency of the wave... | 05/06/1997 |
