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34947 results about "Resistor" patented technology

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. High-power resistors that can dissipate many watts of electrical power as heat, may be used as part of motor controls, in power distribution systems, or as test loads for generators. Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity.

Method and apparatus for providing input to a processor, and a sensor pad

An apparatus for providing input to a processor includes a sensor pad having a surface and a sensor array for sensing pressure at the surface and producing signals corresponding to the pressure at the surface. The sensor array having columns and rows of electrodes that are covered with resistive material which fills in the spaces between the electrodes and acts as a linear resistor between the electrodes and measures pressure on the pad surface between the electrodes. The apparatus includes an interface in contact with the sensor pad and in communication with the sensor array which couples to the processor to communicate the signals to the processor. A method for providing input to a processor includes the steps of sensing pressure with a sensor pad having a surface and a sensor array for sensing the pressure at the surface. There is the step of producing signals corresponding to the pressure at the surface with the sensor array. The sensor array having columns and rows of electrodes that are covered with resistive material which fills in the spaces between the electrodes and acts as a linear resistor between the electrodes and measures pressure on the pad surface between the electrodes. There is the step of communicating the signals to the processor with an interface in contact with the sensor pad and in communication with the sensor array which couples to the processor.
Owner:NEW YORK UNIV

Programmable metallization cell structure and method of making same

A programmable metallization cell ("PMC") comprises a fast ion conductor such as a chalcogenide-metal ion and a plurality of electrodes (e.g., an anode and a cathode) disposed at the surface of the fast ion conductor and spaced a set distance apart from each other. Preferably, the fast ion conductor comprises a chalcogenide with Group IB or Group IIB metals, the anode comprises silver, and the cathode comprises aluminum or other conductor. When a voltage is applied to the anode and the cathode, a non-volatile metal dendrite grows from the cathode along the surface of the fast ion conductor towards the anode. The growth rate of the dendrite is a function of the applied voltage and time. The growth of the dendrite may be stopped by removing the voltage and the dendrite may be retracted by reversing the voltage polarity at the anode and cathode. Changes in the length of the dendrite affect the resistance and capacitance of the PMC. The PMC may be incorporated into a variety of technologies such as memory devices, programmable resistor/capacitor devices, optical devices, sensors, and the like. Electrodes additional to the cathode and anode can be provided to serve as outputs or additional outputs of the devices in sensing electrical characteristics which are dependent upon the extent of the dendrite.
Owner:AXON TECH +1

Portable system for analyzing human gait

The invention is a portable gait analyzer comprising of at least one independent rear foot motion collection unit, at least one independent lower shank motion collection unit, plantar pressure collection unit, at least one processing and display unit, and a soft casing unit. A plurality of accelerometers, rate sensors, force sensor resistors, and pressure sensors provide for the acquisition of acceleration signals, angular velocity signals, foot force signals, and foot pressure signals to be processed. At least one central processing unit, a plurality of memory components, input/output components and ports, telemetry components, calibration components, liquid crystal displays components for the processing and outputting of three dimensional acceleration, angular velocity, tilt, and position. The rearfoot motion collection unit and lower shank motion collection unit interact with the processing and display unit to calculate rear foot kinematic data crucial to identify the motions of pronation and supination. The plantar pressure collection unit interacts with the processing and display unit to calculate plantar pressure data crucial to identify the center of pressure line and excessive and abnormal loads on the sole of the foot. These factors of rear-foot kinematics and plantar pressure lead to gait style identification.
Owner:ADVANCED MOTION TECH INC

Water-blocking medium voltage aluminum alloy power cable

InactiveCN103700442AWith water blocking functionGood vertical water resistanceClimate change adaptationPower cables with screens/conductive layersElectrical conductorMemory effect
The invention discloses a water-blocking medium voltage aluminum alloy power cable which comprises an insulating cable core and an outer wrapping layer, wherein one or more insulating cable cores are provided; the insulating cable core is wrapped by the outer wrapping layer so as to form the water-blocking medium voltage aluminum alloy power cable. The cable is characterized in that each insulating cable core comprises an inner aluminum alloy conductor core (1), an inner shielding layer (2), an insulating layer (3), an outer shielding layer (4), a semiconductor resistor water-blocking zone (5) and a seamless metal sleeve (6) from inside to outside in sequence; the outer wrapping layer comprises a winding and wrapping layer (7), an inner protective layer (8), an armored layer (9) and an outer protective layer (10) from inside to outside The aluminum alloy power cable disclosed by the invention is made of an aluminum alloy material, the inner aluminum alloy conductor core is high in yield strength, small in resilience value, free of memory effect and easy to install, and compared with a copper core cable of the same mass, the cable is small in resistance, and the cost of the alloy material is smaller than that of copper.
Owner:江苏南瑞淮胜电缆有限公司 +1

Reversible electrochemical mirror (REM) state monitoring

Reversible electrochemical mirror (REM) devices typically comprise a conductive oxide mirror electrode that is substantially transparent to radiation of some wavelengths, a counter electrode that may also be substantially transparent, and an electrolyte that contains ions of an electrodepositable metal. A voltage applied between the two electrodes causes electrodeposition of a mirror deposit on the mirror electrode and dissolution of the mirror deposit on the counter electrode, and these processes are reversed when the polarity of the applied voltage is changed. Such REM devices provide precise control over the reflection and transmission of radiation and can be used for a variety of applications, including smart windows and automatically adjusting automotive mirrors. According to the present invention, measurements of the sheet resistance of the mirror electrode in a REM device are correlated with the thickness of electrodeposited mirror metal and can be used to monitor the reflectance of the device. Sheet resistance measurements can be performed while the mirror state of the device is being switched if adequate isolation between the measurement and switching circuits is provided. This can be accomplished by use of external resistors or more sophisticated circuitry, or by taking advantage of the relatively high sheet resistance of the mirror electrode itself. Monitoring the reflectance of REM devices according to this invention provides significant cost and performance advantages.
Owner:TELEDYNE SCI & IMAGING

Hysteresis switch and electricity charging module using the same

ActiveUS20110241624A1Stable charging voltageHysteresis characteristicTransistorBatteries circuit arrangementsElectricityElectrical resistance and conductance
An electricity charging module using a hysteresis switch includes a storage capacitor that preliminarily stores electrical energy supplied from an external power source, a charging unit for preventing over-charging or over-discharging through monitoring of the charging state of the rechargeable battery, and a hysteresis switch that has a larger turn-on voltage level than the turn-off voltage level, and located between the storage capacitor and the charging unit, thereby electrically connecting or disconnecting the storage capacitor with the charging unit. The hysteresis switch includes a first voltage dividing resistor pair that divides the voltage of an external power source by the resistance ratio of the first voltage dividing resistor pair, a second voltage dividing resistor pair whose one end is connected to a positive electrode terminal of the external power source, a first switching device whose control terminal is connected to the junction of the voltage dividing resistors of the second voltage dividing resistor pair, a second switching device whose control terminal is connected to the junction of the voltage dividing resistors of the first voltage dividing resistor pair, and a resistor that is connected to the junction between the first electrode terminal of the second switching device and the junction of the voltage dividing resistors of the first voltage dividing resistor pair.
Owner:KOOKMIN UNIV IND ACAD COOP FOUND
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