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8131439 |
Method and electronic regulator with a current measuring circuit for measuring the current by sense-FET and sigma-delta modulation
An electronic controller for motor vehicle control systems having at least one valve actuation circuit is described herein. The electronic controller uses pulse width modulation to control the load...
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8108695 |
System for minimizing the power consumption of a device in a power down mode
A system is disclosed for reducing power drain of a component when the component is in a powered down state. The system comprises a power input configured to receive power, a power output to the...
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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...
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8010318 |
System and method to determine electric motor efficiency nonintrusively
A system and method for nonintrusively determining electric motor efficiency includes a processor programed to, while the motor is in operation, determine a plurality of stator input currents,...
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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...
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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...
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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...
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7901546 |
Monitoring methods, systems and apparatus for validating the operation of a current interrupter used in cathodic protection
The present invention includes systems, methods and apparatus for continuously, independently and in some cases remotely monitoring the operation of a current interrupter used to test a cathodic...
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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.
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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...
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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...
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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...
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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...
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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...
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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...
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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....
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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...
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7528734 |
System and method for automatically detecting power supply voltage
A system for automatically detecting power supply voltage includes a voltage divider connected to a power supply, an A/D converter connected to the voltage divider, a detection module connected to...
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7521919 |
Measuring device for measuring an electrical current
A measuring device for measuring an electrical current has an alternating-current converter (6) that possesses a primary inductance and an ohmic secondary resistance (RS) and whose output is...
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7521920 |
Measuring device for measuring the output current of a clocked half-bridge circuit
The invention relates to a method for measuring the output current of a clocked half-bridge circuit (1) in which semiconductor switches (5a, 5b) located in half-bridge sections (2a, 2b) are...
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7506180 |
System and method for determining the power drawn from a switching power supply by counting the number of times a switching power supply switch is enabled
Embodiments of a switching power supply circuit are disclosed wherein the number of times that a switch of the circuit is enabled is counted.
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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...
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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...
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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...
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7202694 |
Current sensing structure for integrated power switches
Circuits and methods to sense the current through a coil of an integrated switching converter, applicable to boost and to buck converters, have been achieved. The present invention uses a...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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5592095 |
Charge measurement circuit for a battery in which oscillators are used to indicate mode of operation
A battery pack (10) has a charge measurement circuit (12) for estimating the state of charge during use. The charge measurement circuit (12) includes a sense resistor (24), amplifier (26), at least...
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5237493 |
Current-to-voltage converter with low noise, wide bandwidth and high dynamic range
The design of a current-to-voltage converter with a uniform transfer function in its feedback loop (12) is proposed. It employs a very large, double-shielded measuring resistance (13) and a...
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5128610 |
Current-to-frequency converter
A current-to-frequency converter 12' (FIG. 3) for use with an accelerometer 10 comprises a storage capacitor 13 which receives the accelerometer current and develops a charging voltage, reset...
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5063344 |
Mode selectable interface circuit for an air core gage controller
A single integrated circuit operable in either a single chip mode or a host dependent mode. The integrated circuit comprises mode select circuitry for selecting the single chip mode or the host...
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5034681 |
Voltage detection
A circuit arrangement for detecting an input voltage comprises an oscillator responsive to the voltage, the oscillator including a pair of transistors (8, 9) connected as an astable multivibrator,...
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4908569 |
Transformerless line powdered digital AC voltmeter
A transformerless line powdered digital AC voltmeter for selected voltage ranges is disclosed which takes a minimum of electrical power from the AC line being measured. The AC input is firstly...
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4862074 |
Polyphase volt-hour indicating circuit
An electronic circuit arrangement for producing an output signal representative of the average value of an alternating voltage in a power transmission system, composed of: at least one circuit unit...
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4843308 |
Electronic integrator circuitry for piezoelectric and other sensors
A digital integrator for sensors which takes a time varying current or charge flow signal and converts it into a proportional voltage varying signal. The voltage varying signal is then preferably...
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4831326 |
Digital voltmeter with variable color background
A digital voltmeter includes a display device surrounded by a variable color background area for indicating measured voltage in a digital format. The color of the background area is controlled in...
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4810953 |
Electronic interface device between a sensor and a display unit
An electronic interface device is provided for use between a sensor and a display unit, including a controllable generator which delivers a signal to the display unit and is connected to an input...
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