167results about How to "Reduce field strength" patented technology

A method of testing P2 stiffness of a magnetoresistance (MR) sensor stack including a P2 pinned layer is provided. The method comprises the step of applying an external magnetic field to the MR sensor stack. The external magnetic field is oriented substantially perpendicular to a magnetic field of the P2 pinned layer. The method further comprises varying an amplitude of the external magnetic field, measuring a change in a resistance of the MR sensor stack in response to the varying amplitude of the external magnetic field, and calculating the P2 stiffness based on the measured change in resistance.

A near field RF communicator has an inductive coupler (10) to enable inductive coupling with a magnetic field of an RF signal. A demodulator (102) extracts modulation from an inductively coupled magnetic field. A power provider (109) provides a first power supply for the communicator independent of any inductively coupled signal while a power deriver derives a second power supply from an RF signal inductively coupled to the antenna. A regulator (206; 1302) regulates a voltage supplied by at least one of the first and second power supplies on the basis of a comparison with a reference voltage. A modulator (M) is provided to modulate an inductively coupled magnetic field with data to be communicated via the inductive coupling. In an example, a regulator controller is provided to prevent operation of the regulator in the event of a magnetic field amplitude below a predetermined level or the presence of modulation.

Device and method for generating brief strong current pulses in a coil for generating magnetic field pulses which according to the electromagnetic induction principle induce stimulation currents in the body tissue triggering an action potential of the nerve and/or muscle cells, where the coil is positionable close to the body tissue to be stimulated so that its magnetic field passes through the body tissue, and where the device comprises a power generating unit that can generate a freely selectable temporal course of the current through the coil during the current pulse. A method for determining an optimized temporal course of a brief strong current pulse through the coil, where the temporal course of the current pulse is calculated using a method which numerically simulates the electrical behavior of nerve and/or muscle cells and the coil and optimizes the course of the current pulse regarding at least one parameter, or which by means of stimulating the nerve and/or muscle cells with predetermined current pulses optimizes the temporal course of the current pulse regarding at least one parameter and therefrom determines essential parameters of nerve and/or muscle cells.

The present invention discloses an electrode structure of a light emitted diode and manufacturing method of the electrodes. After formed a pn-junction 2, 3 of a light emitted diode on a substrate 1, a layer of SiO2 is deposited on the periphery of the LED die near the scribe line of the wafer, then a transparent conductive layer 5 is deposited, then a layer of gold or AuGe etc 6, is formed with an opening on the center of the die. After forming alloy with the semiconductor by heat treatment to form ohmic contact, a strip of aluminum (Al) 7 is formed on one side of the die on the front side for wire bonding and to be the positive electrode of the LED. The negative electrode 10 is formed on the substrate by metal contact. Another form of the electrode structure of the present invention is making both the positive electrode 7 and negative electrode 7a on the front side of the LED by etching the p-type semiconductor 3 of the pn-junction and forming a strip of negative electrode 7a on the n-type semiconductor area 2, the positive electrode is formed on the p-type semiconductor area.

A single or multiple band quarter wave resonator antenna assembly for a communications device including a resonator element as a substrate element having disposed thereupon at least a pair of conductor trace elements. The conductor trace elements are disposed upon opposite sides of the substrate element and are operatively coupled to the communications device. The antenna assembly further including a separate conductive member having an approximate ¼ wavelength or greater dimension, which may be defined as the internal printed wiring board ground plane of the communications device.

The present invention relates generally to protecting devices from the detrimental effects of magnetic fields and electromagnetic fields emitted by ambient sources. More particularly, the present invention provides magnetic shields between sensitive devices and portable magnetic and electromagnetic field sources.

A dielectric elastomer has a film that contains a fluorinated silicone elastomer and has two faces. A coating of a stretchable electrode material is applied to each one of the two faces. The fluorinated silicone elastomer has a modulus of elasticity of maximally 450 kPa. The fluorinated silicone elastomer is a three-dimensionally crosslinked, fluorinated, alkyl group-containing polysiloxane in combination with a fluorinated silicone oil. Alternatively, or in addition, the fluorinated silicone elastomer is a three-dimensional wide-mesh crosslinked, fluorinated, alkyl-group containing polysiloxane whose wide mesh property has been effected by a chain length extension by addition of a chain-shaped silicone molecule containing two Si—H groups to an alkenyl group-containing polysiloxane molecule.

A communication system comprises one or a plurality of first wireless tags for defining a first apparatus location area, one or a plurality of second wireless tags for defining a second apparatus location area, a transmitter, and a receiver. The first and wireless tags store IDs corresponding thereto. The transmitter, when residing in the first or second apparatus location area, outputs a wireless ID read signal to read the ID of the wireless tag in the area, multiplexes the read ID on a communication signal, and transmits the resultant communication signal. The receiver, when residing in the second or first apparatus location area, outputs a wireless ID read signal to read the ID of the wireless tag in the area, determines whether or not an ID identical to the read ID is multiplexed on a received communication signal, and determines that the communication signal is addressed to the receiver itself when the ID is multiplexed. In this way, a signal from the transmitter residing in one of the first and second apparatus location areas can be received only by a receiver residing in the other apparatus location area. The wireless tags may be of active type to eliminate the read signal.

Complementary LDMOS and MOS structures and vertical PNP transistors capable of withstanding a relatively high voltage may be realized in a mixed-technology integrated circuit of the so-called "smart power" type, by forming a phosphorus doped n-region of a similar diffusion profile, respectively in: The drain zone of the n-channel LDMOS transistors, in the body zone of the p-channel LDMOS transistors forming first CMOS structures; in the drain zone of n-channel MOS transistors belonging to second CMOS structures and in a base region near the emitter region of isolated collector, vertical PNP transistors, thus simultaneously achieving the result of increasing the voltage withstanding ability of all these monolithically integrated structures. The complementary LDMOS structures may be used either as power structures having a reduced conduction resistance or may be used for realizing CMOS stages capable of operating at a relatively high voltage (of about 20V) thus permitting a direct interfacing with VDMOS power devices without requiring any "level shifting" stages. The whole integrated circuit has less interfacing problems and improved electrical and reliability characteristics.

A transmitted time signal carries time information encoded bit-wise by signal variations in a succession of constant duration time frames, with at least one bit in each time frame. A signal quality is determined and allocated to a respective bit, e.g. depending on the extent of deviation of an actual duration from prescribed durations of a signal variation representing the bit. Thus, a respective signal quality may be allocated to a respective decoded data bit per time frame. Successive data bits can be categorized as interference-free or interference-burdened, and a signal quality of the received time signal can alternatively be determined from the number or ratio of the interference-free bits and the interference-burdened bits. A radio-controlled clock circuit includes a receiving circuit, a bit value decoding arrangement and a signal quality evaluating arrangement.

A perpendicular magnetic recording medium has an “exchange-spring” type magnetic recording layer (RL) formed of two ferromagnetic layers with substantially similar anisotropy fields that are ferromagnetically exchange-coupled by a nonmagnetic or weakly ferromagnetic coupling layer. Because the write head produces a larger magnetic field and larger field gradient at the upper portion of the RL, while the field strength decreases further inside the RL, the upper ferromagnetic layer can have a high anisotropy field. The high field and field gradient near the top of the RL, where the upper ferromagnetic layer is located, reverses the magnetization of the upper ferromagnetic layer, which then assists in the magnetization reversal of the lower ferromagnetic layer. Because both ferromagnetic layers in this exchange-spring type RL have a high anisotropy field, the thermal stability of the medium is not compromised. The medium shows improved writability, i.e., a low switching field, as well as lower intrinsic media noise, over a medium with a conventional single-layer RL.

A microfluidic device comprising independently addressable arrays of interdigitated electrodes can be used to assembly and transport large-scale microparticle structures. The device and method uses collective phenomena in a negatively polarized suspension exposed to a high-gradient strong ac electric field to assemble the particles into predetermined locations and then transport them collectively to a work area for final assembly by sequentially energizing the electrode arrays.

An electrode assembly for an apparatus for trans-surface molecular includes a non-conductive carrier having a proximal surface, a distal surface, and a plurality of through holes from the proximal surface to the distal surface, a plurality of first electrodes disposed on the proximal surface, a first conductor disposed on at least a first portion of the distal surface and extending through at least a first portion of the plurality of through holes and connected to the first electrodes on the proximal surface, a plurality of second electrodes disposed on the proximal surface, and a second conductor disposed on at least a second portion of the distal surface and extending through at least a second portion of the plurality of through holes and connected to the second electrodes on the proximal surface, wherein the first electrodes and the second electrodes are configured and disposed in closely spaced relation on the proximal surface for engaging the tissue surface and applying an electric field.

The invention relates to an arrangement for providing a vehicle, in particular a track bound vehicle, with electric energy, wherein the arrangement comprises a receiving device (200) adapted to receive an alternating electromagnetic field and to produce an alternating electric current by electromagnetic induction. The receiving device (200) comprises a plurality of windings and/or coils (9, 10, 11) of electrically conducting material, wherein each winding or coil (9, 10, 11) is adapted to produce a separate phase of the alternating electric current.

Abstract Antenna device for hearing instruments The disclosure relates to an antenna device for hearing instruments, especially for hearing instruments to be worn in the auditory canal. A need exists specifying a hearing instrument, especially ITE hearing instrument having a data transmission system improved in respect of transmission bandwidth with no increase or only an insignificant increase in space and energy requirement. Disclosed an antenna device for a hearing instrument with an antenna arrangement (16) having a preferred send and receive spatial direction, and a further electrical hearing instrument component (13) which emits noise radiation predominantly in a noise radiation spatial direction. The antenna arrangement (16) and the further hearing instrument component (13) are disposed so that the send and receive spatial direction and the noise radiation spatial direction are oriented transverse to one another in such a way that a coupling-in of noise radiation into the antenna arrangement is reduced. The reduction of the noise couplings into the antenna arrangement makes possible a higher send and receive bandwidth, with the installation volume and energy requirement remaining the same. The further hearing instrument component can involve a receiver or any other component, especially one emitting inductive or electromagnetic radiation.

The invention relates to a method for positioning and real-time tracking train via leakage coaxial optical cable system, wherein it is formed by five inventions, as dual-wire strengthen inner conductor E-shaped groove outer conductor leakage coaxial optical cable, leakage coaxial cable carrier antenna, optical-electric convert emission receiver, train positioning instructing system, and carrier digit information processor. When train receives accurate position signal, the electric map marks the position of train, to calculate out the speed and accelerator of train; the center receives the real-time information of each train, to real-time display accurate position, speed and accelerator at the electric map; computer via said information calculates out best train line, and sends relative command to the train; train receives command to operate.

A spark plug which includes an end at its combustion chamber end, and an end at its connecting end, as well as a housing and an insulator situated in the housing. The insulator has a longitudinal bore having a longitudinal axis, a center electrode situated in the longitudinal bore of the insulator, a first ground electrode which extends into the region of the longitudinal axis of the insulator, and a second ground electrode which is situated at a distance from the longitudinal axis of the insulator laterally next to the center electrode. The insulator has a front section, facing the first ground electrode, which has an end face. The insulator has an outside diameter d and an inside diameter c, d−c, that is, the difference between outside diameter d and inside diameter c, in the front section of the insulator being not greater than 1.9 mm.

In a non-contact power feeding apparatus of the present invention, power is fed through an air gap from a power transmission coil of a power feeding side circuit to a power receiving coil of a power receiving side circuit, which are closely located to face each other, based on a mutual induction effect of electromagnetic induction. The power transmission coil and the power receiving coil are respectively composed of a planar assembly of a number of unit coils. Each unit coil is formed in a spirally wound flat structure, wherein the direction of an electric current is set in reverse to make the north and south magnetic poles reverse between each unit coil which is juxtaposed to another to directly come into line. As a result, the unit coils, which are juxtaposed to another to directly come into line, are provided in such a manner that an overlapping area of a respectively formed magnetic field cancels another out to be offset

A semiconductor system having a trench MOS barrier Schottky diode, having an integrated substrate PN diode as a clamping element (TMBS-ub-PN), suitable in particular as a Zener diode having a breakdown voltage of approximately 20V for use in a vehicle generator system, the TMBS-sub-PN being made up of a combination of Schottky diode, MOS structure, and substrate PN diode, and the breakdown voltage of substrate PN diode BV_pn being lower than the breakdown voltage of Schottky diode BV_schottky and the breakdown voltage of MOS structure BV_mos.

The invention relates to a system for transferring electric energy to a track bound vehicle, in particular to a light rail vehicle, such as a tram, wherein the system comprises an electric conductor arrangement (12) for producing an electromagnetic field and for thereby transferring the energy to the vehicle, the electric conductor arrangement (12) comprises at least one line (1, 2, 3) for carrying one phase of an alternating voltage or current, the line (1, 2, 3) extends along the track, the line (1, 2, 3) is arranged in such a manner that it produces—at each point in time while the alternating electric current is flowing through the line (1, 2, 3)—a row of successive magnetic poles (at sections 5) of an electromagnetic field, wherein the successive magnetic poles have alternating magnetic polarities, the row of successive magnetic poles extends in the travel direction of the vehicle which is defined by the track.