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| Number | Title | Issue Date |
| 8138771 | Touch controller with read-out line It is disclosed to measure the impedance of a read-out line. The read-out line includes at least two cascaded electrical circuit segments, each electrical circuit segment including two longitudinal arms, wherein one of the longitudinal arms includes an electrical co... | 03/20/2012 |
| 8040141 | Orthogonal radio frequency voltage/current sensor with high dynamic range A radio frequency (RF) sensor that measures RF current includes a substrate that has an inner perimeter that defines an aperture. A conductor extends through the aperture. Sensor pads are arranged on the aperture and are connected to form two sensor loops. The loops... | 10/18/2011 |
| 7973540 | Coupling loop and method of positioning coupling loop A coupling loop or antenna is provided that can be used with a system that determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the s... | 07/05/2011 |
| 7944215 | Detector A device for measuring the position of a first body relative to a second body comprising: a first body which further comprises an electrical intermediate device; a second body which further comprises at least two inductors energised with an alternating current and a... | 05/17/2011 |
| 7936174 | Coupling loop A coupling loop or antenna is provided that can be used with a system that determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the s... | 05/03/2011 |
| 7902837 | Alignment method of two substrates by microcoils Substrates to be aligned include microcoils arranged at the level of their facing surfaces. In an alignment phase, power is supplied to at least the microcoils of the first substrate, whereas the inductance of the microcoils of the second substrate is measured. The ... | 03/08/2011 |
| 7728606 | Measurement instrument In a measurement instrument for measuring pollutants in a liquid, such as oil in water, the measurement instrument includes a main unit disposed in a first housing and a sensor unit disposed in a second housing. The housing, manufactured from an electrically insulat... | 06/01/2010 |
| 7714593 | Radiofrequency based sensor arrangement and a method A sensor arrangement for a sensor arrangement remotely readable by radio frequencies. The sensor arrangement includes an LC resonator that includes a capacitor and a coil, and a sensor element coupled to the LC resonator whose properties change as a function of a me... | 05/11/2010 |
| 7595647 | Cable assembly for a coupling loop A coupling loop or antenna is provided that can be used with a system that determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the s... | 09/29/2009 |
| 7492166 | Method for determining the source equivalent inductance of an energized AC circuit This method induces a test load on an energized AC electrical system component. This load is switched on for a very brief interval (usually in microseconds). The method includes simultaneously measuring the current response to this pulsed load. From this response, t... | 02/17/2009 |
| 7432723 | Coupling loop A coupling loop or antenna is provided that can be used with a system that determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the s... | 10/07/2008 |
| 7358710 | Temperature-compensated inductor DCR dynamic current sensing A resister network having a negative temperature coefficient (NTC) may be utilized to create a temperature compensated equivalent resistance “R” for a current sensing RC network used in measuring inductor current of a DC-to-DC converter or a general switching re... | 04/15/2008 |
| 7269574 | Method for supporting the orders received of transformer In order to spread a transformer having energy saving and environmental effects widely and quickly, a method for supporting received orders of a transformer is provided. In the method, a first response including a customer's desired inquiry relating to an installati... | 09/11/2007 |
| 7256384 | Signal-enhancement system for photodetector outputs A light scattering photometer signal-enhancement systems includes an adaptive sample and subtract circuit controlled by a computer or microcontroller (MCU). The MCU controls the gain of a programmable-gain amplifier (PGA) cascade that is used to amplify the raw phot... | 08/14/2007 |
| 7256974 | Electrical ground isolation and secondary failure reduction detection and isolation A system for isolating electrical ground faults and secondary failures in an electrical system, the system comprising an AC ground isolation state machine for detecting and isolating an AC ground, a DC ground isolation state machine for detecting and isolating a DC ... | 08/14/2007 |
| 7226239 | System for measuring material properties from a moving construction vehicle A system is for sensing a property of a material mat from a construction vehicle. The system includes a sensor for sensing the material property and a positioning mechanism connected with the vehicle and with the sensor. The mechanism displaces the sensor between fi... | 06/05/2007 |
| 7219024 | Material analysis including density and moisture content determinations A system, method and program product for determining the in-place engineering properties such as density and moisture content of many varieties of engineering materials, are disclosed. The invention also includes a database, material model and sensor model for use w... | 05/15/2007 |
| 7212013 | Apparatus 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 coaxial test probe. Simple, low-cost test fixturing and methods of testing... | 05/01/2007 |
| 7208959 | Methods for measuring parasitic capacitance and inductance of I/O leads on an electrical component using a network analyzer 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 coaxial test probe. Simple, low-cost test fixturing and methods of testing may be used t... | 04/24/2007 |
| 7204581 | Magnetic actuator using ferrofluid slug A magnetostatic actuator uses a ferrofluid slug confined in a cylindrical tube which is wrapped in a conducting coil. By applying a current to the coil, a magnetic field is generated inside the coil. The ferrofluid slug may be attracted to the interior of the coil b... | 04/17/2007 |
| 7205775 | Sensing apparatus and method There is described an inductive sensor for sensing a parameter such as position. The inductive sensor includes: receive aerial which is electro-magnetically coupled to a magnetic field generator via a resonant circuit with the electromagnetic coupling varying in dep... | 04/17/2007 |
| 7199593 | Apparatus and 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 coaxial test probe. Simple, low-cost test fixturing and methods of testing... | 04/03/2007 |
| 7126344 | Diagnostic device for an antenna A diagnostic device for an antenna includes a coil (20) or the like connected on the one hand to a reference potential and on the other hand to the output of an amplifier (12), including two condensers (C2, C3) mounted in series, a first ... | 10/24/2006 |
| 7109887 | Vehicle detector system with automatic loop checking A method and apparatus for automatically testing the integrity of an inductive loop in a vehicle detector system. A check loop is placed adjacent each inductive loop in a multi-channel vehicle detector system. Each check loop is periodically activated by the vehicle... | 09/19/2006 |
| 7067842 | Method and apparatus for monitoring parasitic inductance The present invention includes a method and apparatus for measuring a parasitic inductance associated with a portion of an integrated circuit fabricated on a semiconductor substrate. A test chip for measuring the parasitic inductance is fabricated together with the ... | 06/27/2006 |
| 7061230 | Circuit and method for measuring distances A circuit for measuring distances and which has at least two inputs (1, 2), at least one measuring coil (3), and at least one signal source, wherein at least two input signals (epos, eneg) are generated by means of the signal sour... | 06/13/2006 |
| 7057399 | Resolver circuit including BTL amplifier A resolver circuit including a signal generation circuit, a bridge tied load amplifier, a resolver, and a resolver processing circuit is provided. The signal generation circuit is configured to generate an excitation signal for driving the resolver. The bridge tied ... | 06/06/2006 |
| 7049832 | Circuit arrangement and method for determining the load current through an inductive load connected to a supply voltage in a clocked manner Circuit arrangement for determining the load current through an inductive load (L) connected to a supply voltage (Vbat) in a clocked manner includes a current measuring impedance (30) which can be connected in series with the inductive load (L), a first and s... | 05/23/2006 |
| 7035065 | Electrical ground isolation and secondary failure reduction detection and isolation A system for isolating electrical ground faults and secondary failures in an electrical system, the system comprising an AC ground isolation state machine for detecting and isolating an AC ground, a DC ground isolation state machine for detecting and isolating a DC ... | 04/25/2006 |
| 6952093 | Adaptive small-signal compensation for switching regulators A system, method, and apparatus are arranged to provide small-signal compensation in a switching regulator that includes an inductor. A zero adjustment circuit is included in the system to introduce at least one zero in the closed-loop transfer function associated w... | 10/04/2005 |
| 6911829 | Inductive signature measurement circuit An apparatus for measuring the inductance of a wire-loop with noise-cancellation, auto-calibration and wireless communication features, or detector circuit. The apparatus measures the effective change in inductance induced in a wire-loop as a vehicle passes over the... | 06/28/2005 |
| 6906527 | Proximity sensor A connector has a conductive terminal assembly including a plug-adaptable conductive terminal electrically connected with a circuit assembly and a pin holder for holding the conductive terminal The terminal assembly is sized to be able to be inserted from the front-... | 06/14/2005 |
| 6876936 | Measurement of inductance using a digital storage oscilloscope under real-time operating environments A method and apparatus for measuring inductance. The method and apparatus include processing current and voltage waveform data associated with an inductive device to determine edge and slope parameters for each of a plurality of current waveform data cycles. Further... | 04/05/2005 |
| 6867709 | Vehicle detector and classifier A vehicle detector and classifier comprises a plurality of electrically conductive loops 1 arranged substantially in a plane perpendicular to a road surface, for detecting vehicle wheels. The loops can be arranged in a transverse, vertical slot 2 and h... | 03/15/2005 |
| 6864686 | High-frequency surgical device and operation monitoring device for a high-frequency surgical device A high-frequency surgical device encompassing control electronics that control a power unit which utilizes a high-frequency transformer that is the only galvanic separation between the supply voltage and the patient/user unit. ... | 03/08/2005 |
| 6842014 | Methods for determining inductance and resistance of an inductor A resistor (having a resistance of Rs) is connected in series with an inductor whose inductance and/or resistance is desired to be determined. An alternating voltage (such as a sinusoidal voltage) is applied across the series-connected resistor and induct... | 01/11/2005 |
| 6838886 | Method and apparatus for measuring inductance A method and apparatus for measuring changes induced in an inductive field on a wire-loop of an oscillator circuit based upon variations in a current function without the need to measure frequency changes. Induced noise has independent effects upon the current funct... | 01/04/2005 |
| 6836128 | Inductive flow sensor for determining the position of flowing elements and method of determining the position of flow An inductive path sensor for determining the position of the influencing element (2) is described, with several coils (4) arranged in succession, with one capacitor (5), with an amplifier element (6), with at least one changeover switch (... | 12/28/2004 |
| 6803773 | Method and circuit for detecting a change in inductance A method and circuit for detecting a change in inductance of a variable inductance element. An oscillating signal has a frequency that varies with inductance of the element. An intermediate voltage is produced at a level that varies according to frequency of the osc... | 10/12/2004 |
| 6803772 | Inductance measuring method One end of an inductor is connected to a drain of a P-channel type MOS transistor. A source of source of MOS transistor is connected to an electric power source which supplies a voltage Vdd. The other end of inductor is connected via a dummy capacitor to a ground. F... | 10/12/2004 |
