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| Number | Title | Issue Date |
| 7576549 | Methods for measuring sample resistance in electroporation Systems and methods of measuring resistances of samples to be electroporated and utilizing the measured resistances in the electroporation are provided. During an electrical pulse sent to the sample, a time and a corresponding voltage drop on a known capacitance is ... | 08/18/2009 |
| 7372717 | Methods for resistive memory element sensing using averaging A system for determining the logic state of a resistive memory cell element, for example an MRAM resistive cell element. The system includes a controlled voltage supply, an electronic charge reservoir, a current source, and a pulse counter. The controlled voltage su... | 05/13/2008 |
| 7369145 | Method and apparatus for controlling the uniformity of print density of a thermal print head array A method for controlling the print density of individual heating elements of a thermal print head array determines respective energy values for each heating element in response to image pixel data to be printed, multiplies determined energy values by a respective pr... | 05/06/2008 |
| 7365546 | Apparatus and method for non-destructive testing of primers, in particular for airbags in motor vehicles A measuring device and a measuring method for non-destructive testing of an ignitor installed in a subassembly, particularly of a motor vehicle. The device and measuring method generate a measuring current with a predefined value, check-test the predefined value of ... | 04/29/2008 |
| 7304484 | Method and device for the temperature compensation of a measuring bridge A method for the temperature compensation of a resistance measuring bridge, such as in particular a Wheatstone bridge, is characterized in that a capacitor positioned between the input circuit and a resistance switching circuit of the Wheatstone bridge is successive... | 12/04/2007 |
| 7271610 | Using a parametric measurement unit to sense a voltage at a device under test Circuitry for use in testing a device includes a first measurement unit to apply a forced voltage to the device, and a second measurement unit having functionality that is disabled. The second measurement unit includes a sense path to receive a sensed voltage from t... | 09/18/2007 |
| 7259572 | Method and apparatus for detecting impedance A method and apparatus for detecting an impedance across a pair of terminals. A sensing circuit is AC coupled to the terminals which produces an output related to a time constant associated with the impedance. ... | 08/21/2007 |
| 7250777 | Method and device for measuring resistance A device for measuring a resistance includes a comparator. A D-type flip-flop has its D input connected to the output of the comparator and its latch input connected for receiving a pulse signal at a fixed pulse repetition rate. A reference voltage source is connect... | 07/31/2007 |
| 7231727 | Apparatus and method for removing moisture The present invention relates to a moisture removal apparatus and method for accurately detecting moisture generation in an early stage and quickly removing it so as to prevent steam or frost from being formed on glass surfaces of vehicles and industrial devices, an... | 06/19/2007 |
| 7115487 | Crystalline thin film and process for production thereof, element employing crystalline thin film, circuit employing element, and device employing element or circuit A process for producing a crystalline thin film is provided which comprises melting and resolidifying a starting thin film having regions different in the state coexisting continuously. A small region of the starting thin film has a size distribution of number conce... | 10/03/2006 |
| 7113102 | System having a screen and an external power supply unit A system having a screen, in particular a flat screen, and having an external power supply unit that can be connected by a plug connector to the screen in order to supply the screen with a DC voltage. The system provides a signaling device at the power supply unit e... | 09/26/2006 |
| 7071711 | Method and device for determining the ratio between an RC time constant in an integrated circuit and a set value A method and device for determining the ratio between the actual value of an RC time constant of an RC network embodied in an integrated circuit and a set value of the RC time constant includes first and second reference RC networks each having a resistor and a capa... | 07/04/2006 |
| 7009355 | Wiper control system for a vehicle and a method thereof A wiper control system is provided which comprises a rain droplet detector, a multiplexer, a count register, and a wiper control unit. The rain droplet detector has a plurality of switches that are configured to be electrically connected by rain droplets, and each s... | 03/07/2006 |
| 6943555 | Redundant safety circuit for squib testing An apparatus for measuring the resistance of a squib, including an input for receiving a power supply and a circuit connected to the input for limiting the power supplied to the squib. The circuit includes a voltage limiter which limits voltage output of the circuit... | 09/13/2005 |
| 6842710 | Calibration of integrated circuit time constants A method and system for calibrating a time constant within an integrated circuit. A voltage storage element is charged, and the time required to achieve a reference voltage on the storage element is measured. The measured time is compared to a desired time. It neces... | 01/11/2005 |
| 6819123 | Extraction of interconnect parasitics The apparatus for detecting the effects of interconnect resistance and capacitance (RC) in a logic circuit includes a first ring oscillator with the interconnect RC parasitics in a logic circuit and a minimum reference ring oscillator without the interconnect RC par... | 11/16/2004 |
| 6806720 | Method of reliability testing A method of reliability testing is disclosed. A critical breakdown resistance of a device is determined. The test structure is subjected to stress conditions and electrically tested. The critical breakdown time of the test structure is recorded when the operating re... | 10/19/2004 |
| 6771082 | Resistance circuit stabilization and pulse duration control systems for electroporation instruments Systems, methods and apparatus for stabilizing resistance measurements in electroporation systems so as to achieve high-accuracy measurements, and for controlling the pulse duration, or time constant, of electroporation pulses. Circuitry is provided to accurately de... | 08/03/2004 |
| 6690183 | Resistance measurement In order in a method for measuring the resistance across discharge times of a capacitor to eliminate the interfering influence of the resistance values of electronic switches, the invention provides for a capacitor to be repeatedly charged and discharged ... | 02/10/2004 |
| 6664777 | Photometric apparatus and photometric method Photometric apparatus and photometric method measure a wide range of incident light amounts accurately and efficiently. The photometric apparatus includes an optical sensor for delivering a photocurrent; an integrator capacitor for integrating the photocu... | 12/16/2003 |
| 6531883 | Thermal printer and device and method for measuring resistance of heating element of thermal head of thermal printer A thermal head of a thermal printer is provided with an array of parallel connected heating elements and transistors connected in series to the heating elements in one to one relation. In a resistance measuring mode, one of the transistors connected to on... | 03/11/2003 |
| 6498496 | Device for detecting membrane leaks in a diaphragm pump Device to detect leaks and fatigue in membranes wherein the membrane consists of at least two membrane layers, and wherein at least one of the membrane layers includes a conductor on its inner surface that causes an alteration to a measured value in case ... | 12/24/2002 |
| 6472859 | Capacitively coupled electrical ground detection circuit An electrical ground detection circuit 10 having a first capacitor 18 and a second capacitor 20 which selectively receives a certain amount of voltage. The certain amount of voltage decreases by a certain amount during a period of time, as the capacitor 1... | 10/29/2002 |
| 6437575 | Low-voltage detecting circuit A low-voltage detecting circuit for power sources is based upon the relation of the discharge time of a capacitor and the measured voltage value to determine whether the voltage level of the power source is too low. The voltage detecting circuit comprises... | 08/20/2002 |
| 6404208 | Thermal printer and resistance data measuring device for thermal head of the same A thermal head of a thermal printer has plural heating elements arranged along a line and connected in parallel with one another. A respective one of the heating elements is connected to one of plural heat control switches, which are selectively turned on... | 06/11/2002 |
| 6262580 | Method and testing system for measuring contact resistance for pin of integrated circuit A method and a testing system for measuring contact resistance of a pin on an integrated circuit. An RC circuit is coupled to the integrated circuit, and a response signal of a testing signal input to the integrated circuit is monitored. The response sign... | 07/17/2001 |
| 6208215 | VCO and filter controlled by common integrated thermal frequency reference A VCO and filter each include a variable transconductance amplifier as a resistive element. The same control bias current is supplied to the variable transconductance amplifier of both the oscillator and filter. This control bias current may be externally... | 03/27/2001 |
| 6198295 | Apparatus and method for detecting electrical resistance change in connectors to a remote mounted sensor A control system detects an electrical resistance change in a connector coupling a remote mounted temperature sensor to a control system. A control system determines the resistance of the sensor or the connector by selectively charging or discharging a ca... | 03/06/2001 |
| 6121848 | Integrated accurate thermal frequency reference A thermal RC network is fabricated in silicon as a lateral array of forward-biased PN junctions, which may take the form of the base-emitter junctions of bipolar transistors. Application of a clock signal from a voltage controlled oscillator to the silico... | 09/19/2000 |
| 6119949 | Apparatus and method for providing a multiple option select function A control system and method provide a multiple option select function in which an option select resistor acts as a selector. The control system determines the resistance value of the resistor and maps the resistance value to a data entry in an option sele... | 09/19/2000 |
| 6084482 | Oscillatory circuit having built-in test circuit for checking oscillating signal for duty factor A C-R oscillator generates a clock signal at a predetermined frequency determined by a capacitor and a resistor, and a test circuit is connected between the C-R oscillator and a pair of signal terminals for outputting the clock signal; when external contr... | 07/04/2000 |
| 6084417 | Method for determining the moisture impinging on a resistive rain sensor In a method and a system for the operation of a resistive moisture sensor, conductance of the sensor is measured, whereby current through the moisture sensor is measured preferably during an application of a voltage to the moisture sensor. In order to avo... | 07/04/2000 |
| 5852369 | Thermal printer and resistance data measuring device for thermal head of the same A thermal head of a thermal printer has plural heating elements arranged along a line and connected in parallel with one another. A respective one of the heating elements is connected to one of plural heat control switches, which are selectively turned on... | 12/22/1998 |
| 5834943 | Apparatus and method for sensing failed temperature responsive sensors A microprocessor control (10, 24) has one or more temperature responsive thermistor sensors (20, 26, 28) used to provide temperature inputs to control operation of a temperature control system. The microprocessor control subjects the thermistor sensors to... | 11/10/1998 |
| 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 |
| 5698987 | Method of driving heating element to match its resistance, thermal printer, and resistance measuring device A standard resistor having a known resistance value is connected to one transistor in a drive IC. The drive IC has a plurality of transistors each controlling the on/off of a heating element. The saturation voltage of each transistor is generally the same... | 12/16/1997 |
| 5657238 | Resistance measuring circuit, and thermal apparatus including the measuring circuit A dual-slope measuring circuit for measuring an unknown resistance. A first time measurement measures the time which is needed to charge a capacitor to a first reference voltage (Uref1) via a reference resistor. A second time measurement measur... | 08/12/1997 |
| 5621329 | Automatic self-calibration system for digital teraohmmeter An automatic self-calibration system for digital teraohmmeter wherein a built-in standard resistor is provided. The system is able to calibrate the values of the key components by taking the standard resistor as reference. The calibration procedure of the... | 04/15/1997 |
| 5617035 | Method for testing integrated devices An integrated device test system (10, 40) having AC and DC measurement modes of operation comprises a drive circuit (11, 41), a programmable measurement unit (12) and a switch (18). The drive circuit (11, 41) may be a current mode drive circuit (11) or a ... | 04/01/1997 |
| 5612623 | Failure diagnostic apparatus and method for a resistor element A monitor current to a squib as an air bag actuating element conducts in one and the opposite directions alternately. Each produced voltage value is differentially amplified with a positive reference voltage and a difference between the amplified voltages... | 03/18/1997 |
