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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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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 ( 5 a, 5 b ) located in half-bridge sections ( 2 a, 2 b )...
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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 (R S ) and whose output is...
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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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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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4806854 |
Current draw and power consumption display circuit
A circuit layout for continuous display of power consumption of an electric device includes a light emitting diode actuated by voltage pulses, the frequency whereof corresponds to the current draw...
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4804910 |
Traction load meter system
A traction load meter system for displaying information concerning the amount of current energizing electric motors which drive a locomotive. These motors have power and braking modes and have a...
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4804909 |
Atto-amperemeter
An atto amperemeter includes a shop tip (1) correctable to a voltage source (18) providing a known potential (U') via a sample conductor measured, the tip (1) faces a particle detector such as an...
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4789824 |
Digital measuring instrument for displaying a measured value that varies over time
In order to display a measured value, a digital measuring instrument is provided with a digital display and an analog display. The display value emitted by the digital display is fixed during a...
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4785236 |
Device for measuring voltage by scanning
Device for measuring voltage by sampling, including a voltage metering sampling means (2) driven by a pilot frequency generator (12), an amplifier (3) to amplify the sampled signal and a signal...
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4743843 |
Display signal generator device
A display signal generator device which allows the pulse width of a digital signal to be constant and the pulse repetition period to be proportional to the analog amount of an input signal so as to...
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4728886 |
Method and apparatus for converting an electrical signal into a proportional frequency
A method and apparatus for converting an electrical signal into a proportional frequency is disclosed. Modulation of the output frequency resulting from polarity switching cycles having...
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4686530 |
Cable transmission of signals
A light conductor has two sealed embedding elements molded to its ends, respectively containing a light emitter and a light receiver. The light emitter is connected to a likewise embedded Wiegand...
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4520311 |
Current to pulse-sequence transducer
A current to pulse-sequence transducer for transforming a current to be measured into a sequence of pulses which has a certain mark-to-space ratio, includes a first transforming device for...
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4514684 |
Acoustic waveguide voltage monitor
The monitor system consists of a voltage controlled oscillator for produc an acoustic wave whose frequency is proportional to the voltage being measured. An acoustic waveguide is used for...
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4510443 |
Voltage measuring device
A voltage measuring device includes a surface acoustic wave propagating medium and transmitting and receiving transducers coupled to the medium. An electrode that receives an unknown voltage is...
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4502004 |
Current pulse monitor
An apparatus for measuring varying current levels is particularly suited to the measurement of distinct current pulses. The apparatus couples by means of an inductive sensor to a current carrying...
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4498138 |
Electronic watt/var transducer
A watt/var transducer utilizing the pulse width-pulse height modulation type of multiplying scheme wherein a stable squarewave is generated by switching from one reference voltage to another...
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4495462 |
Current source test circuitry
A test circuit for determining the current produced by a current source device with a predetermined, non-zero voltage at the output of the device. The circuit includes a current to voltage...
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4437058 |
Indicating means for measuring instrument
An indicating device for measuring instruments having a voltage-frequency converter for converting measurement signals expressed as voltage values into frequency signals with a frequency...
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4388590 |
Digital audio level metering
An arrangement which displays an indication of the amplitude level of digital audio signals. The arrangement includes an acquisition means which receives digital audio signals and determines the...
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