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| Number | Title | Issue Date |
| 7863910 | Insulation resistance detecting apparatus There is provided an insulation resistance detecting apparatus that accurately calculates an insulation resistance value in real time. The insulation resistance detecting apparatus includes: pulse generator 10, comparator 11 to which reference voltage ... | 01/04/2011 |
| 7411407 | Testing target resistances in circuit assemblies A test system includes a circuit assembly having an IC and an external circuit. The IC includes test circuitry used to observe data indicative of target resistances in the external circuit. The test system evaluates the data to determine target resistance values. A ... | 08/12/2008 |
| 7403816 | Method and apparatus for analyzing bioelectrical response waveform information, and diagnostic apparatus thereof A method for analyzing skin response waveform information obtained by measuring skin impedance with a voltage of a predetermined frequency. A current value at the start of polarization caused by the application of the voltage is determined, followed by determining a... | 07/22/2008 |
| 7208065 | Structure for measuring the etching speed The specification discloses a structure and method for measuring the etching speed. A test layer is connected with several resistors. Etching the metal layer disconnects in order the resistors from the circuit. The equivalent resistance of the sensing resistor syste... | 04/24/2007 |
| 7117459 | Layout check system A layout check system checks whether a layout of a power source, a component including a power pin, and a bypass capacitor on a PCB and defined by layout data created using a CAD system allows the bypass capacitor to function effectively. A storage unit stores the l... | 10/03/2006 |
| 7034515 | Instantaneous voltage lowering detection device An instantaneous voltage dip detection device is provided with: all-pass filter (2) for phase shifting a supply voltage waveform (11) by 90°; a comparator 7 that outputs a signal when the supply voltage waveform (11) is smaller than a th... | 04/25/2006 |
| 6999892 | Circuit arrangement and method for controlling and evaluating signal detectors A circuit arrangement (10) for activating a sensor and evaluating its signals, in particular for parametric sensors with complex impedances. The circuit arrangement comprises at least one sensor (2) for acquiring mechanical data. In order to minimize o... | 02/14/2006 |
| 6963194 | Analog signal measuring device and method An analog signal measuring device for measuring an analog signal includes a digital controller, a waveform converter and a comparator. The digital controller includes a PWM controller for outputting a pulse signal having an adjustable pulse width to the waveform con... | 11/08/2005 |
| 6737875 | Method and apparatus for in-circuit impedance measurement A device and method for measuring an impedance between first and second nodes in an electrical circuit without removing components includes at least one current source to provide first and second currents or current signals of known values. First and second probes c... | 05/18/2004 |
| 6651020 | Method and apparatus for economical drift compensation in high resolution measurements A system for measuring differences in a physical variable, such as temperature or voltage, by utilizing predictable behavior in the relative time drift of offset curves for various circuit elements, including, for example, two sensors coupled to a differe... | 11/18/2003 |
| 6549021 | APPARATUS FOR MEASURING THE RATIO OF ELECTRICAL SIGNALS, ELECTRIC COMPONENT MEASURING INSTRUMENT, METHOD FOR CALIBRATING ELECTRIC COMPONENT MEASURING INSTRUMENTS AND METHOD FOR MEASURING THE RATIO OF ELECTRICAL SIGNALS A ratio meter and apparatus for measuring electrical components with high stability and no effect on the circuit under test. Two input signals are switched by a switching means and the inputs to two measuring means are measured while keeping the switches ... | 04/15/2003 |
| 6512383 | System for measuring the alternating current equivalent series resistance of a conductor A system and method for measuring the alternating current series resistance of a conductor when transporting large currents on the order of several thousand amperes. The system comprises a current sensor, a current/voltage converter, a voltage divider, a ... | 01/28/2003 |
| 6452405 | Method and apparatus for calibrating a current sensing system Disclosed is a current sensing system for measuring the current flowing through a current sensing resistance. The system has a calibration resistance coupled to the current sensing resistance and a pair of input resistances each having a first end coupled... | 09/17/2002 |
| 6350959 | Method for sorting integrated circuit devices An inventive method for sorting integrated circuit (IC) devices of the type having a substantially unique identification (ID) code, such as a fuse ID, includes automatically reading the ID code of each of the IC devices, and sorting the IC devices in acco... | 02/26/2002 |
| 6100486 | Method for sorting integrated circuit devices An inventive method for sorting integrated circuit (IC) devices of the type having a substantially unique identification (ID) code, such as a fuse ID, includes automatically reading the ID code of each of the IC devices, and sorting the IC devices in acco... | 08/08/2000 |
| 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 |
| 5798650 | Process and device for determining the mass fraction of one constituent of a layer, and effecting the quality control of a composite metal sheet A process for controlling the weldability of a sheet (1) of the composite metal sheet type having a layer (7) which is interposed between two metal facing sheets (3,5) and comprises a polymer (8) having a filler of conductive particles (9). This process c... | 08/25/1998 |
| 5729123 | Method and apparatus for probing relative volume fractions A relative volume fraction probe particularly for use in a multiphase fluid system includes two parallel conductive paths defining therebetween a sample zone within the system. A generating unit generates time varying electrical signals which are inserted... | 03/17/1998 |
| 5627476 | Milliohm impedance measurement An impedance probe circuit and method presents a balanced load to a DC or RF voltage source and to two voltage measurement nodes. The impedance probe circuit is accurate for measurement of an impedance device X which has a range always less than the value... | 05/06/1997 |
| 5602488 | Method and apparatus for adjusting sectional area ratio of metal-covered electric wire Methods of measuring, adjusting and uniformalizing a sectional area ratio of a metal-covered electric wire, a method of cleaning an electric wire, a method of manufacturing a metal-covered electric wire, an apparatus for measuring a sectional area ratio o... | 02/11/1997 |
| 5600176 | Integrated voltage divider Integrated voltage divider comprising partial resistors (R1 ,R2) formed of paths of polycrystalline semiconductor material applied over a dielectric layer (4) on a semiconductor substrate (5). Under the paths, each forming a partial resistor (R1,R2) in th... | 02/04/1997 |
| 5512837 | Voltage drop detecting circuit In a voltage drop detecting circuit, when voltage Vcc being monitored is at a steady-state value, reference voltage B is classified by divided voltages Va to Vc from detection voltage generation circuit group for classification of reference voltage. In ac... | 04/30/1996 |
| 5457402 | Armature resistance measuring apparatus and method A method and apparatus for determining the resistance of the coils and commutator connections in an armature of an electric motor wherein a current is generated between a first commutator segment and a commutator segment located at least three segments be... | 10/10/1995 |
| 5386188 | In-circuit current measurement A current in a circuit is measured without breaking the circuit. A relatively low resistance element in the circuit such as a component lead is chosen. A current is forced through the element and the voltage drop measured. Another current is forced throug... | 01/31/1995 |
| 5351010 | Resistance ratio measurement utilizing measuring currents of opposite plural direction An apparatus and method for determining a characteristic of a resistor and/or an environment occurring as a voltage across a measuring resistor (e.g., a voltage across a temperature-dependent resistor) by comparing it with a reference value that occurs as... | 09/27/1994 |
| 5307019 | Method and apparatus for determining the weld and coil resistances of a motor winding Disclosed is a method and apparatus for determining weld and coil resistances of a commutator type electric motor armature. The method comprises the steps of determining a resistance ratio for a pair of coils and then determining the weld resistance acros... | 04/26/1994 |
| 5272444 | Dielectric cross-plot water cut monitoring apparatus and method The present invention includes a dielectric sensor which provides at least two signals corresponding to the sensed dielectric of a petroleum stream. A temperature sensor also senses the temperature of the petroleum stream and provides a corresponding temp... | 12/21/1993 |
| 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, which is constituted by a combination of a capacitor composed ... | 12/14/1993 |
| 5210501 | Apparatus for processing sensor signals having switch-capacitor structures The arrangement serves to process sensor signals furnished by a sensor which when fed with a supply signal in response to the action of a physical measured quantity. The sensor generates a measuring effect representing the dependence of an electrical char... | 05/11/1993 |
| 5146173 | Position determining device A position determining device for an adjustment device including two continuous potentiometers having sliders movable to respective positions determininng respective resistance values of the potentiometers, the sliders being coupled with the adjustment dr... | 09/08/1992 |
| 5007283 | Method and device for processing measured values In connection with a method and a device for processing measured values, where resistance variations are evaluated as a measure for the variation of the gas concentration to be measured, it is proposed to measure a basic resistance value at least once, pr... | 04/16/1991 |
| 4994752 | Position detecting potentiometer for a moving body A position detecting apparatus electrically detects the present position of a moving body reciprocated within a movable region. The apparatus comprises a resistance section continuously disposed by a predetermined length along the reciprocating direction ... | 02/19/1991 |
| 4816745 | Method and arrangement for measuring the resistance ratio in a resistance half-bridge The measuring circuit is used to measure the resistance ratio ƊR/R in a resistance half-bridge comprising two series-connected resistors, of which the one resistor has the resistance R+ƊR and the other resistor the resistance R-ƊR. The two resistances ... | 03/28/1989 |
| 4814692 | Circuit and method for measuring and digitizing the value of a resistance The invention relates to a circuit and a method adapted for measuring and digitizing the value of a resistance. The circuit includes and A/D converter operating in accordance with a charge balancing principle, and a resistance network connected to the A/D... | 03/21/1989 |
| 4714874 | Test strip identification and instrument calibration Test device apparatus is disclosed containing a electrically conductive region which provides information concerning the nature of the test device and/or its position. In a preferred embodiment a conductive strip is applied to a test device and used to de... | 12/22/1987 |
| 4524319 | Method for the determination of kinetics of structure formation in a binder A method for monitoring structural changes in a binder in contact with a solid object, while the binder is curing. Conductivity measuring pick-ups are placed in the binder mass and at the boundary between the binder and the solid object. A low amplitude A... | 06/18/1985 |
| 4362988 | Method of and circuit arrangement for determining the magnitude of an unknown resistance element In order to ascertain the magnitude Ri of an unknown resistance element in digital terms, two calibrating resistances of known magnitudes R1 and R2 =mR1 (with m>1) are connected in circuit with a capacitor, to f... | 12/07/1982 |
| 4300094 | Finish measuring method and apparatus The amount of electrically conductive finish that has been applied to a filament is determined by measuring the conductance of a length of the filament. The measurements are made independently of any difference in conductivity of finish mediums by means o... | 11/10/1981 |
| 4262247 | Making and using corrosion measuring probes for fluid conveying conduits The corrosion of a fluid-conveying metallic conduit is measured by electrically connecting relatively thick and thin walled sections of that conduit as the arms of an electrical resistance-measuring bridge.... | 04/14/1981 |
| 4218650 | Apparatus for measuring semiconductor device resistance A test structure for enabling the accurate measurement of the resistance characteristics of a semiconductor material, of the type which includes one or more pairs of electrical terminals disposed on the surface of the material to enable measurements of th... | 08/19/1980 |
