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7620512 |
Determining a time base for a microcontroller
The invention relates to a method for producing a time base for a microcontroller and a simple circuit arrangement therefor, which comprises an RC-element having a specific time constant, said...
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7609072 |
Processing tantalum capacitors on assembled PWAs to yield low failure rate
A method of conditioning tantalum capacitors on printed wire assemblies is disclosed. According to the method, each of the capacitors on an assembly is subjected to the same conditioning level...
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7595648 |
Device and method for reading a capacitive sensor, in particular of a micro-electromechanical type
A read device of a capacitive sensor includes: a signal source supplying an electrical read signal for driving the capacitive sensor; and a discrete-time sense circuit for generating an electrical...
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7589538 |
Micropower voltage-independent capacitance measuring method and circuit
A circuit for measuring an unknown capacitance includes a reference capacitor having a known capacitance, an oscillator timing circuit, a variable frequency oscillator and a microcontroller. The...
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7541816 |
Capacitive sensor
In a capacitive sensor, a sensing electrode is positively charged, the sensing electrode and a sensing capacitor are charge-balanced, the sensing electrode is negatively charged, and then the...
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7423436 |
Capacitive level measurement and detection device using high frequency voltage
A device for measurement and detection of the level of a medium in a container with a sensor element, with a reference element and an electrical circuit which contains at least one AC voltage...
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7397253 |
Transmission line pulse (TLP) system calibration technique
A transmission Line Pulse (TLP) device calibration method wherein the TLP device includes a pulse generator for generating a pulse, a cable having an input terminal coupled to said pulse generator,...
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7368922 |
Method and device for determining parameters of fluctuating flow
The invention relates to a method and a device for determining the parameters of a fluctuating flow of a fluid in a pipe, wherein at least three electrodes that are placed at a distance from one...
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7239152 |
Methods for measuring parasitic capacitance and inductance of I/O leads on an electrical component using a network analyzer
Apparatus and methods are provided for measuring the potential for mutual coupling in an integrated circuit package of any type or configuration using a network analyzer in conjunction with a...
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7019529 |
Electrostatic sensor device and matrix
A system for electrostatically measuring the shape or pattern of objects including an array of sensor devices having the capability of responding, due to variable electrostatic coupling, to produce...
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6864691 |
Circuit arrangement for detecting the capacitance or capacitance change of a capacitive circuit element or component
A circuit arrangement for detecting the capacitance or capacitance change of a capacitive circuit element or component, in which there is a capacitive noise voltage compensation element, which...
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6842016 |
Method of evaluating the time left before gelation of a thermosetting composition
Non-destructive method allowing in-situ evaluation, in a sensitive and reproducible way, for a given thermosetting composition, of the time left before gelation of said composition as a function of...
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6828802 |
Pressure measurement device including a capacitive sensor in an amplifier feedback path
A pressure measurement device that has a digital clock circuit that provides an excitation clock and a control output. An integrator includes a switch controlled by the control output, an...
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6823275 |
Fault tolerant apparatus and method for determining a revolution rate of a gear
An apparatus comprises an edge detector, a memory and a pulse-input engine. The edge detector is configured to receive an input signal and a counter signal. The edge detector is further configured...
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6819121 |
Method and apparatus for measurement of concrete cure status
An apparatus and a method for determining the cure state of thermosetting concrete using time domain reflectometry. A miniature capacitor is constructed at the end of a coaxial transmission line...
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6798218 |
Circuit for measuring absolute spread in capacitors implemented in planary technology
A circuit for measuring absolute spread in capacitors implemented in planary technology. A charge pump supplying a charge current to an internal capacitor (Cint) is used, the voltage across the...
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6690180 |
Process and apparatus for determining ratio of fluid components such as methanol and water for reforming feed
A method and sensor for determining the ratio of two components in a fluid mixture comprising a test cell in open communication with the fluid mixture and a reference cell containing a desired...
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6657444 |
Capacitance-based position sensor with integrating demodulator
A capacitance-based position sensor configured to sense relative position of a pair of objects. The sensor includes capacitor circuitry having a capacitor that varies in capacitance with relative...
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6630834 |
Apparatus and method for measuring change in capacitance
The apparatus includes a first gain adjuster, a second gain adjuster, an amplifier, a demodulator, a controller, and a change measuring unit. The first gain adjuster adjusts the gain of an input...
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6573733 |
Capacitance measuring technique for estimating cable length
A hand held test instrument measures cable lengths by applying a square wave signal to a conductor of a pair and detects the induced current in the other conductor of the pair. A synchronous...
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6545484 |
Board inspection apparatus and board inspection method
An apparatus and method capable of effective board inspection. In the board inspection apparatus wherein a pulse signal is applied to one edge of a pattern line on a board, a non-contact probe...
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6496021 |
Method for making a capacitive distance sensor
This invention is directed to a method of making a capacitive distance sensor that includes one or more sensor cells each with first and second capacitor plates. The method includes determining an...
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6486647 |
Circuit for monitoring an alternative current power switch
A circuit ( 1 ) for monitoring the state—open or closed—of an ac switch ( 2 ) has an input ( 4 ) which is connected by way of a diode ( 9 ) and a first resistor ( 10 ) to a high-ohmic input (...
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6480805 |
Positioning sensor for a motor vehicle
A position sensor for a motor vehicle is described which, as its sensor signal, generates several pulse-width modulated signals that vary as a function of position. The position sensor transmits...
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6456094 |
Capacitive voltage divider for measuring high voltage pulses with millisecond pulse duration
In a capacitive voltage divider for measuring high voltage pulses with millisecond pulse duration comprising a high voltage divider including a first cascade of at least two serially arranged...
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6429674 |
Pulse circuit
A pulse generator generates a pulse that is transmitted to a device under test through a signal path that has a substantially constant impedance along its entire length. A voltage on the signal...
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6353337 |
Load capacitance measuring circuit and output buffer adaptive to wide range of load capacitance
An output buffer includes a reference capacitor; a constant current source connected in series with the reference capacitor, for generating a reference voltage with a constant gradient by charging...
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6333680 |
Method and system for characterizing coupling capacitance between integrated circuit interconnects
An exemplary embodiment of the invention is a method of characterizing capacitances of a plurality of integrated circuit interconnects. The method includes coupling a first oscillator to a first...
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6133742 |
Multi-pulse sampling of signals using electrostatic force sampling
A method and an apparatus for providing non-contact measurement of waveforms proximate to a surface of a sample. In one embodiment, the described apparatus includes a composite probe waveform...
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6060890 |
Apparatus and method for measuring the length of a transmission cable
Apparatus for measuring the length of a transmission cable carrying primary and inverted multilevel transmission signals. A counter is arranged to count timing signals from the beginning of the...
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5963043 |
Method and apparatus for characterized parasitic capacitance between integrated-circuit interconnects
A method and apparatus for characterizing dimensions and parasitic capacitance between integrated-circuit interconnects are disclosed. The apparatus is a test structure including at least two...
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5869999 |
Open loop pre-amplifier for an electronic measuring system
A fast, open-loop amplifier for an electronic measuring system is formed by a folded, differential, open-loop amplifier. This amplifier includes a differential common-source portion, a current...
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5861758 |
Process and system for the operation of a resistive moisture sensor
A process and a system for the operation of a resistive moisture sensor, in particular on the windshield of a motor vehicle, wherein the conductivity of the moisture sensor is measured shortly...
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5804977 |
Transmission line pulser discharge circuit
An RF matching network provides matching between a charged first transmission line and a relay circuit which is switched to connect the charged transmission line to one end of a second transmission...
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5770853 |
Pulse generator and pulse generation method having maximized pulse height
A pulse generator is provided with a photoconductor in which first to third transmission lines composed of conductive film are formed on a semi-insulating substrate and the transmission lines are...
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5646539 |
Multi-purpose capacitive sensor
An apparatus for sensing two parameters of a hydraulic system having a hydraulic line includes a pair of electrodes contained within the line and oppositely spaced, forming a capacitor. The...
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5612622 |
Apparatus for identifying particular entities in a liquid using electrical conductivity characteristics
An apparatus for identifying components associated with the liquid in an electrically non-conductive container utilizing a pair of electrodes. The container extends along a particular dimension...
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5585733 |
Capacitive sensor and method of measuring changes in capacitance
An apparatus and method for measuring the variation in the capacitance of a capacitive sensor. The apparatus and method include means for constantly applying a constant electrically current to an...
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5581193 |
Multiple source and detection frequencies in detecting threshold phenomena associated with and/or atomic or molecular spectra
Multiple frequency sources are used to apply a time varying signal to a scanning tunneling microscope and a current or voltage passing between the electrodes of the microscope is measured by a...
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5563519 |
Circuit and method for determining the physical position of a variable resistive device between its mechanical limits
A circuit and method is disclosed which determines the physical position of a selected resistance setting of a mechanical variable resistive component, such as a potentiometer, between its...
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5530369 |
Method for monitoring the flow and cure rate of a resin material using time encoded pulses
A digital sensor network scanner for use in monitoring resin flow and its re progress during a resin fabrication process in which a plurality of non-intersecting electrically conductive threads are...
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5519327 |
Pulse circuit using a transmission line
A pulse discharge circuit for pulse testing an integrated-circuit device under test (DUT) is provided which uses three separate switching relays S1, S2, and S3, which are operated in a...
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5469364 |
Apparatus and methods for measuring and detecting variations in the value of a capacitor
A new and improved method for measuring the value of a capacitor and for detecting small variations in the value of a capacitor around a reference value is described. In accordance with the...
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5399978 |
Probe apparatus and method for measuring high-frequency signals
A probe apparatus includes a probe contact connected to a storage capacitance via a photoconductive switch. The photoconductive switch can be operated at high speed by means of a pulsed laser. The...
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5381101 |
System and method of measuring high-speed electrical waveforms using force microscopy and offset sampling frequencies
A potentiometry apparatus for measuring a periodic electrical waveform existing proximate the surface of a sample such as a semiconductor wafer is disclosed herein. The potentiometry apparatus...
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5343156 |
IC for producing an output voltage related to fuel composition in a capacitive fuel sensor
A circuit for responding to the output of a capacitive fuel sensor that can distinguish gasoline from methanol and produces an output that is related to the methanol proportion. The response is...
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5294889 |
Battery operated capacitance measurement circuit
A capacitance measuring circuit uses only a DC voltage source to perform the capacitance measurement. For this purpose, the circuit is arranged to charge an unknown capacitor which is being...
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5274334 |
Calibrated physical parameter value measurement system
A circuit for measuring a parameter value by measuring the time required to charge a capacitor in a sensor RC circuit from a first to a second voltage includes a reference RC circuit whose...
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5270663 |
Apparatus for detecting a liquid mixing ratio
A liquid mixing ratio detecting apparatus is designed so that an oscillation voltage generated by an oscillation unit is applied to one of a differentiating circuit and an integrating circuit,...
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5212453 |
Pulse echo method and apparatus for measuring the moisture content of materials
In an apparatus for determining the moisture content of a material by measuring the dielectric constant of the material by means of a measuring conductor which is disposed such that the material...
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