Class 324/602 - With auxiliary means to condition stimulus/response signals

Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter including other than measuring or testing
No. of patents: 38
Last issue date: 10/23/2007

Number	Title	Issue Date
7285964	Method for signal extraction in a universal sensor IC A apparatus and method for creating a universally usable and configurable sensor platform which is used in conjunction with various sensor and sensing elements to sense and measure environmental conditions which incorporates inputs from multiple sensors 6-...	10/23/2007
7265557	Method and circuit for measuring characteristic parameters of intermodulation distortion An arrangement is for measuring characteristic parameters of intermodulation distortion of a device under test. The arrangement may include a generator of at least two tones at different test frequencies, and an attenuation path feeding the device with a replica of ...	09/04/2007
7127652	X-tree test method and apparatus in a multiplexed digital system An X-Tree test apparatus for testing combinatorial logic circuits in a multiplexed digital system. The apparatus includes a plurality of contacts for electrical connection with pins on a device under test. A first driver drives a logic one signal, and a second drive...	10/24/2006
6965310	Remote notification method The method for identifying the presence of an item to a user interface entails using a container having a loading opening and a collection opening, passing the item through the loading opening activating a first sensor, sending a first signal from the first sensor t...	11/15/2005
6965795	Impedance spectroscopy method for monitoring ischemic mucosal damage in hollow viscous organs Alternate embodiments of an impedance spectroscopy method are disclosed for monitoring ischemic mucosal damage in hollow viscous organs. In each embodiment, a sensor catheter is placed inside a patient's hollow viscous organ. Afterwards, the catheter is electrically...	11/15/2005
6941233	Arrangements to detect and respond to disturbances in electrical power systems A control arrangement and method is provided for detecting and responding to disturbances in electrical power systems. In a preferred arrangement, an integration is initiated that is based on a comparison of actual voltage of a source and a reference voltage. When t...	09/06/2005
6911812	Method and apparatus for measuring frequency pulling in oscillators A test apparatus and method of measuring pulling of the frequency of an oscillator. The apparatus includes a bias tee, a power supply, a spectrum analyzer, a second power supply, a symmetrical resistive power splitter, a power meter and a synthesized signal generato...	06/28/2005
6788071	Method and apparatus for generating a voltage across a membrane A method and apparatus for generating a transmembrane voltage, including a semiconductive substrate having a surface for receiving a membrane thereon, and a light source for illuminating at least a portion of the semiconductive substrate. Measurement of current thro...	09/07/2004
6657455	Predictive, adaptive power supply for an integrated circuit under test A main power source supplies current through path impedance to a power terminal of an integrated circuit device under test (DUT). The DUT's demand for current at the power input terminal temporarily increases following edges of a clock signal applied to t...	12/02/2003
6647780	Slow wave structure sensor with zero-based frequency output An oscillating circuit is disclosed which is responsive to frequency variations caused by parameter changes in an associated slow wave structure sensitive element. A local oscillator and mixer circuit is used to subtract an offset frequency output to rese...	11/18/2003
6448754	BIST method for testing cut-off frequency of low-pass filters A method and circuitry for implementing a built-in self test (BIST) for determining the frequency characteristics of filter circuits in mixed-signal integrated circuits (ICs). The method comprises inserting a Circuit Under Test (CUT) into a feedback loop ...	09/10/2002
6313647	Technique for measuring resistivity Disclosed is anew technique for measuring the resistivity of ultra-thin carbon films (less than 200 Å). The technique involves using a probe with very smooth surface, a thin layer lubricant (20-30Å)that enables the intimate and stable electrical contact...	11/06/2001
6262634	Phase-locked loop with built-in self-test of phase margin and loop gain A phase-locked loop (PLL) is provided, which includes a PLL reference input, a PLL output and a phase detection loop coupled between the PLL reference input and the PLL output. The phase detection loop has a loop filter node. A delay element is coupled wi...	07/17/2001
6255829	Apparatus for function testing of sensors in high voltage devices The device may be used to, for example, function test sensors in high voltage plants and signal boxes. The device makes it possible to function test sensors in high voltage plants, independent of where the sensors are located. The elongated device has one...	07/03/2001
6177802	System and method for detecting defects in an interlayer dielectric of a semiconductor device using the hall-effect A system for detecting defects in an interlayer dielectric (ILD) interposed between first and second conductive lines lying adjacent each other along a first plane is provided. A processor controls general operations of the system. A voltage source adapte...	01/23/2001
6166551	Method for monitoring the state of microcrystalline change of solid materials A process for monitoring the state of microcrystalline change of solid materials, by observing the frequency of a load-pull oscillator which is RF-coupled to the material under test (preferably by a simple single-ended RF probe). Areas where this techniqu...	12/26/2000
6011398	Current-leakage tester A leakage tester includes multiple circuits capable of simulating the impedance of the human body to electrical current under a variety of conditions, and in which the multiple circuits can be selected using a single menu-based operator interface for test...	01/04/2000
5999002	Contact check for remote sensed measurement A contact resistance check circuit and method for verifying that a sufficient electrical connection is established between a source and a sense lead of a Kelvin connection. The circuit includes a microprocessor for driving a transformer that is connected ...	12/07/1999
5896033	Method and device for electronic compensation of electrical disturbance signals and use thereof The invention consists of a system to compensate for the parasitic signal induced by a parasitic impedance in the signal path. An auxiliary signal, outside of the frequency band of the desired signal, is introduced to evaluate the effects of the parasitic...	04/20/1999
5745368	Method for voltage stability analysis of power systems A method for Voltage Stability Analysis of a bulk power supply system is taught. Briefly stated, a computationally efficient method is disclosed which is appropriate for low and high voltage applications as well as differing types of loads and load change...	04/28/1998
5689192	Method for simulating a controlled voltage for testing circuits for electromagnetic susceptibility Apparatus and method for low cost monitoring the level of signal at a test point in a system for susceptibility to electromagnetic fields. A probe, including a detector diode, and a non-metallic, electrically overdamped conductor, which is transparent to ...	11/18/1997
5625343	Device for determining and/or monitoring a predetermined filling level In devices for determining and/or monitoring a predetermined level with a sensor that is excited to perform mechanical oscillations at its self-resonant frequency by means of an electronic excitation circuit which is excited via a piezoelectric excitation...	04/29/1997
5610526	Contact hazard meter having a human equivalent circuit A contact hazard meter used to measure electromagnetic field induced currents which would flow through a human body to ground upon physical contact with an item carrying such field induced currents includes a conductive contact, a human equivalent circuit...	03/11/1997
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 predetermined sequence. For charging the capacitance of a pulse-formin...	05/21/1996
5444644	Auto-configured instrumentation interface An instrumentation interface circuit controlled by a microprocessor of a data acquisition system enables identification of the type of input/output devices that are connected to its inputs through a systematic analysis of the characteristics of the connec...	08/22/1995
5317273	Hearing protection device evaluation apparatus A portable hearing protection device evaluation apparatus which can be taken into the field to measure noise attenuation of a muff type hearing protection device under actual working conditions is provided. The apparatus includes two miniature microphones...	05/31/1994
5304919	Electronic constant current and current pulse signal generator for nuclear instrumentation testing Circuitry for testing the ability of an intermediate range nuclear instrut to detect and measure a constant current and a periodic current pulse. The invention simulates the resistance and capacitance of the signal connection of a nuclear instrument ion ...	04/19/1994
5073758	Resistance measurement in an active and high temperature environment A circuit and method for measuring resistance in an active and high temperature environment is provided using a low frequency square wave as an input. The square wave input is fed through the unit under test into a full-wave rectifier and RMS circuit. The...	12/17/1991
5030919	Zero impedance switch In a switchable impedance tester for measuring very small impedances, the effect of switch impedances is eliminated by connecting the test load between two switching transistors in their emitter-collector circuit, and driving them with operational amplifi...	07/09/1991
4682099	Logarithmic potentiometer circuit An inexpensive potentiometer circuit having an approximately logarithmic characteristic that can be accurately determined is obtained if a resistance element having a linearly adjustable ohmic resistance value is connected parallel to a negative impedance...	07/21/1987
4652811	Method for measuring liquid content in a porous medium such as soil A method for measuring liquid content of a porous medium such as soil applies a voltage to a plurality of point contacts placed in the porous medium to be measured for liquid content, as well as to a common electrode also inserted into the porous medium t...	03/24/1987
4495458	Termination for high impedance attenuator A termination for high impedance attenuator to be connected to the input of such high impedance attenuator. The termination circuit includes a series combination of a termination resistor, a delay line and an inductor, thereby cancelling the negative refl...	01/22/1985
4493651	Statistical teaching apparatus A statistical teaching apparatus includes a plurality of parallel circuits selectively coupled to an operational amplifier. Each circuit is adapted to receive a component from a population being statistically evaluated. The circuits include amplifier feed...	01/15/1985
4494065	Electric capacity measurement of erratically shorted capacitors A method and apparatus for determining the average clearance between closely fitting cylindrical parts by determining electrical capacity between the bore and cylinder across a dielectric of known characteristics. The method and apparatus is useful to obt...	01/15/1985
4246535	Design method for linear amplifier A method of designing a linear rf amplifier comprising an output load impedance and an active device including the steps of (a) applying DC bias to the device, (b) applying two different frequency signals of an amplitude C, and (c) changing the value of t...	01/20/1981
4134063	Apparatus for the time-dependent measurement of physical quantities An apparatus for measuring the values of physical parameters, using variable capacitor type transducers arranged in a matrix with each operable to sense the value of a corresponding physical parameter as existing at a predetermined point. A demultiplexer ...	01/09/1979
4088949	Batteryless ohmmeter An ohmmeter and circuit therefor which does not require an internal battery or a continuing coupling to an external voltage source during normal use, with the necessary operating electrical power supplied through a high capacity capacitor which, after ini...	05/09/1978
4028507	Apparatus for applying particular voltages to three-terminal circuits and measuring resulting current flows for the purpose of determining circuit characteristics Apparatus which may be used in the performance of at least six tests on a telephone subscriber's line is disclosed. The apparatus operates to force the tip and ring leads of a line to particular potential levels and then produces output voltages related t...	06/07/1977

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Class 324/602 - With auxiliary means to condition stimulus/response signals