58results about How to "Large inductance" patented technology

An inductor element having good characteristics is formed on a substrate. An inductor element 100 includes two spiral conductors 120, 122 formed on the surface of a semiconductor substrate 110. The upper conductor 120 and the lower conductor 122 have substantially the same shape, and the conductor 120 is used as an inductor conductor, while the conductor 122 is used as a floating conductor. The outer and inner ends of the conductor 120 are connected with lead wires 130, 132, respectively, and the lead wire 132 connected with the inner ene extends outside between the lower conductor 122 and the semiconductor substrate 110.

A method for forming an RF inductor of helical shape having high Q and minimum area. The inductor is fabricated of metal or damascened linear segments formed on three levels of intermetal dielectric layers and interconnected by metal filled vias to form the complete helical shape with electrical continuity.

A system and method for high-speed, low-power cryogenic computing are presented, comprising ultrafast energy-efficient RSFQ superconducting computing circuits, and hybrid magnetic / superconducting memory arrays and interface circuits, operating together in the same cryogenic environment. An arithmetic logic unit and register file with an ultrafast asynchronous wave-pipelined datapath is also provided. The superconducting circuits may comprise inductive elements fabricated using both a high-inductance layer and a low-inductance layer. The memory cells may comprise superconducting tunnel junctions that incorporate magnetic layers. Alternatively, the memory cells may comprise superconducting spin transfer magnetic devices (such as orthogonal spin transfer and spin-Hall effect devices). Together, these technologies may enable the production of an advanced superconducting computer that operates at clock speeds up to 100 GHz.

There are provided a coil-embedded dust core that provides high inductance and a method for manufacturing the same. The coil-embedded dust core includes a coil 1 formed by winding a flat conductor 2 and a green body 10 comprising of ferromagnetic metal powder coated with an insulating material. The coil 1 is composed of a winding section 3 in which the flat conductor 2 having front and back surfaces opposed to each other with a predetermined distance is wound and lead-out end sections 4a and 4b that are extended from the winding section 3. Either one of the front and back surfaces of the lead-out end section 4a and either one of the front and back surfaces of the lead-out end section 4b are formed so as to be on the same plane. By using the coil 1 in which the both end sections (lead-out end sections 4a and 4b) are formed on the same plane, the coil-embedded dust core can be made smaller in size, and high inductance can be provided.

There are provided a coil-embedded dust core that provides high inductance and a method for manufacturing the same. The coil-embedded dust core includes a coil 1 formed by winding a flat conductor 2 and a green body 10 comprising of ferromagnetic metal powder coated with an insulating material. The coil 1 is composed of a winding section 3 in which the flat conductor 2 having front and back surfaces opposed to each other with a predetermined distance is wound and lead-out end sections 4a and 4b that are extended from the winding section 3. Either one of the front and back surfaces of the lead-out end section 4a and either one of the front and back surfaces of the lead-out end section 4b are formed so as to be on the same plane. By using the coil 1 in which the both end sections (lead-out end sections 4a and 4b) are formed on the same plane, the coil-embedded dust core can be made smaller in size, and high inductance can be provided.

A multilayer inductor includes a multilayer body formed by stacking magnetic layers on top of one another. Loop-like line-shaped conductors are respectively formed on the magnetic layers. The loop-like line-shaped conductors are connected to one another by interlayer connection conductors, and thereby a coil conductor having an axis extending in the stacking direction is formed. One end of the line-shaped conductor, which is an uppermost-layer-side end portion of the coil conductor, is connected to a line-shaped conductor, which is for routing and is formed on a higher layer, by a interlayer connection conductor. The line-shaped conductor is connected to an interlayer connection conductor that is formed so as to penetrate through substantially the center inside the loop-like line-shaped conductors. The interlayer connection conductor is connected to an external connection conductor on a bottom surface of the multilayer body via a line-shaped conductor and an interlayer connection conductor.

A surface mounting type planar magnetic device comprised of upper ferrite magnetic film, lower ferrite magnetic film and a planar coil interposed therebetween. For applying surface mount technology, an opening is formed in the upper ferrite magnetic film above a coil terminal portion and then, an external electrode conductive with the coil terminal portion through the opening is formed on the upper ferrite magnetic film. Further, this surface mounting type planar magnetic device is of a thin structure and can be mounted on the surface of a printed board. Its power loss is small, its inductance is large, its frequency characteristic is excellent, the disparity of the characteristic is small and its reliability is excellent.

A multi-state phase shifter circuit having both low insertion loss (IL) and good return loss. Two or more phase shift elements are combined into a single cell architecture to reduce the number of series-connected FET switches and reduce the total IL. One embodiment has two ports connected by parallel signal paths each comprising a pair of switches and a phase shift element comprising, for example, an inductor, a capacitor, a transmission line, or a conductor. Another embodiment has two ports connected by parallel signal paths each comprising a switch and at least one associated phase shift element. The switches in each parallel signal path allow the associated phase shift element to be placed in-circuit under the control of an applied signal. The sets of switches may be independently controlled, so that multiple parallel signal paths may be switched into circuit between the phase shifter circuit ports at the same time.

The configurations of an inverter circuit are provided in the present invention. The proposed circuit includes a first bridge arm having a first sub-bridge arm with a first switch and a first middle point coupled to the first switch, and a second sub-bridge arm with a second switch and a second middle point coupled to the second switch, a first inductor having a first terminal coupled to the first middle point and a second terminal, and a second inductor having a first terminal coupled to the second middle point, and a second terminal coupled to the second terminal of the first inductor and outputting an AC voltage.

The invention provides a tuned transmitter coil for transcutaneous transmission of power and information from an external component of an auditory prosthesis to an implanted receiver. A shield is provided in order to reduce a skin-to-coil capacitance, thereby improving tuning stability of the coil from one user to the next. A shield may also be provided in order to reduce electromagnetic interference.

An inductor element 10 effectively functions even when formed on a substrate and comprises two upper and lower conductors 1, 2 spirally formed on the front side of a semiconductor substrate 3. The conductors 1, 2 have substantially the same shape. When viewed from the above of the front side of the substrate 3, the two conductors 1, 2 are superposed one on the other almost exactly. Lead wires 6a, 6b are connected to the outer end (outer peripheral end) and the inner end (center end) of the conductor 1, respectively. The outer end of the conductor 1 is connected to the inner end of the conductor 2 through a connection wire 6c. The conductor 1 functions as an inductor conductor and is connected to a circuit provided on the semiconductor substrate 3 through the lead wires 6a, 6b.

A rotating electrical machine, includes; a rotor in which a plurality of magnetic poles are provided in circumferential direction, and a stator within the rotor is disposed with a gap against the rotor, wherein; two stator magnetic poles are formed by winding coils in phase and by the stator core within 360° of electrical angle defined by the magnetic poles of the rotor; the coil turns that form respective stator magnetic poles have angular widths in circumferential direction of less than 180° of electrical angle; the coil turns that form the respective two stator magnetic poles are provided so as not to mutually overlap and are wound so that adjacent ones of the stator magnetic poles have mutually opposite polarities, and; in the stator, each winding of each coil consists of an external bridge wire, a turn portion, an internal bridge wire, and a turn portion in that order.

A laminated high frequency device includes a laminated body including plural magnetic sheets having relative permeabilities larger than 1, inductor patterns for forming plural inductors in the laminated body, and capacitor patterns forming a capacitor. The capacitor patterns are opposed to each other about another sheet of the laminated body. The inductors have large inductances without thickening of the magnetic sheet or thinning of the inductor patterns providing a large conductor loss. This arrangement reduces a size of the laminated high frequency device while providing isolation between the inductors.

Disclosed is a structural vibration damping device, which comprises a piezoelectric element adapted to be mounted on a structure, a shunt circuit inserted between two electrodes of the piezoelectric element, and an electric circuit for selectively opening and closing the shunt circuit. In this damping device, the electric circuit is operable, when a voltage between the electrodes of the piezoelectric element has a positive or negative extreme value due to a vibration of the structure, to close the shunt circuit so as to allow a current to flow between the electrodes of the piezoelectric element, and, when the current is reduced to zero, to open the shunt circuit so as to preclude the current flow until a voltage between the electrodes of the piezoelectric element subsequently has the extreme value. Further, each of the shunt circuit and the electric circuit is designed to be operated using only a power generated by the piezoelectric element. The damping device of the present invention makes it possible to achieve high-performance power-free damping with enhanced reliability and maintainability.

A rotating electrical machine includes a rotor, in which a plurality of magnetic poles are provided in circumferential direction, and a stator, within which the rotor is disposed. In the stator, two stator magnetic poles are formed by winding coils of one phase and by a stator core of the stator within 360° of electrical angle defined by the magnetic poles of the rotor. The coils that form respective stator magnetic poles have angular widths in circumferential direction of less than 180° of electrical angle, the coils that form the respective two stator magnetic poles are provided so as not to mutually overlap and are wound so that adjacent ones of the stator magnetic poles have mutually opposite polarities, and, in the stator, each winding of each coil consists of an external bridge wire, a turn portion, an internal bridge wire, and a turn portion, in that order.

A multi-path constant current drive circuit includes a DC / AC converter, a main transformer and at least two rectifying and filtering units. The main transformer includes at least one assistant side winding with a tap; together with the assistant side winding of the main transformer, each of the at least two rectifying and filtering units respectively forms a power supply loop; each power supply loop includes a first rectifying loop and a second rectifying loop, which are relatively used for the rectification of the positive and the negative half-cycle alternating voltage; a current-equalizing transformer is arranged between the adjacent first power supply loop and second power supply loop, the windings of the current-equalizing transformer are respectively in the rectifying loops contained in the first power supply loop and the second power supply loop, thus realizing the current equalization between the different rectifying loops in which the adjacent rectifying and filtering units are contained. The multi-path constant current drive circuit performs a good current equalization, and can reduce the volume of the current-equalizing transformer and decrease the cost.

A multi-state phase shifter circuit having both low insertion loss (IL) and good return loss. Two or more phase shift elements are combined into a single cell architecture to reduce the number of series-connected FET switches and reduce the total IL. One embodiment has two ports connected by parallel signal paths each comprising a pair of switches and a phase shift element comprising, for example, an inductor, a capacitor, a transmission line, or a conductor. Another embodiment has two ports connected by parallel signal paths each comprising a switch and at least one associated phase shift element. The switches in each parallel signal path allow the associated phase shift element to be placed in-circuit under the control of an applied signal. The sets of switches may be independently controlled, so that multiple parallel signal paths may be switched into circuit between the phase shifter circuit ports at the same time.

The invention discloses a three-phase bridge PWM converter. The three-phase bridge PWM converter comprises a first bridge arm circuit, a second bridge arm circuit and a third bridge arm circuit which have the same connecting mode. One end of each bridge arm circuit is connected with the positive electrode of a capacitor, and the other end of each bridge arm circuit is connected with the negative electrode of the capacitor. Each bridge arm circuit comprises two IGBTs which are in series connection, and each IGBT is in parallel connection with a diode. The invention further discloses an active power filter which is provided with the three-phase bridge PWM converter. By means of the three-phase bridge PWM converter and the active power filter formed by the same, harmonic waves and idle work with the variable frequency and size can be compensated, the defect of the active filter can be overcome, and the compensation characteristic better than that of the active filter can be obtained.

The invention discloses an ultra-small circularly polarized antenna based on an electromagnetic ultra-resonator, the antenna comprises a dielectric substrate and a metal floor, and is characterized inthat a plurality of laminated capacitors, a feed device and a metal loop connecting end are formed on the dielectric substrate; first electrodes of the laminated capacitor are electrically connectedwith one another to form a first common electrode of the laminated capacitor; the feeding device is connected to the first common electrode of the laminated capacitor, and the metal loop connecting end is arranged on the second electrode of each laminated capacitor; each metal loop connecting end is electrically connected with one end of a metal column, and the other end of each metal column is electrically connected with the metal floor; and the metal floor, the metal column and the laminated capacitor which are electrically connected form a super-resonator current loop. By adjusting the length of the laminated capacitor and the length of the metal loop, large equivalent capacitance and equivalent inductance are constructed, small resonant frequency is obtained, and ultra-small antenna design is achieved.

Complimentary series crossover circuits to reduce phase distortion in loudspeaker groups, typically pairs, are described. In the fundamental embodiment, each loudspeaker possesses two drivers, a woofer and a tweeter. The “effective third-order” crossover on the right-hand loudspeaker remains “symmetric,” but the “effective third-order” crossover on the left-hand loudspeaker is rendered “asymmetric,” as described. Other embodiments apply this principle to higher crossover orders and greater numbers of drivers. This technology is applied to the series filter in 2.5-way, 3.5-way, etc. loudspeakers using otherwise conventional series / parallel crossovers. This technology can be combined with other circuits like a Zobel, typically used for impedance correction. Some configurations of “phase-unified” loudspeakers require that a Zobel is applied to all drivers except the tweeter. Accordingly a rule combining effective crossover order and handedness is established.

A method of path measurement uses eddy current principles and a sensor which interacts with a measuring object. The sensor has an electrical connector and a sensor coil. In accordance with the method, an operating voltage is applied to the sensor such that a magnetic field is built up by an oscillator in cooperation with the sensor coil. A measuring object may be moved in the vicinity of the sensor coil through an opening in the sensor coil to produce field strength changes adjacent to the coil and the oscillator. The field strength changes are detected by an evaluation circuit and transmitted to a microcontroller. The microcontroller processes the signals of the evaluation circuit and provides the evaluation circuit with said signals via an output and protection circuit. The sensor coil consists of a plurality of windings constructed in a planar manner.

An inductor element 30 effectively functions even when formed on a substrate and comprises two upper and lower conductors 1, 2 spirally formed on the front side of a semiconductor substrate 3. The conductors 1, 2 have substantially the same shape. When viewed from the above of the front side of the substrate 3, the two conductors 1, 2 are superposed one on the other almost exactly. Lead wires 6a, 6b are connected to the outer end (outer peripheral end) and the inner end (center end) of the conductor 1, respectively. The outer end of the conductor 1 is connected to the inner end of the conductor 2 through a connection wire 6c. The conductor 1 functions as an inductor conductor and is connected to a circuit provided on the semiconductor substrate 3 through the lead wires 6a, 6b.

A multi-path constant current drive circuit includes a DC / AC converter, a main transformer and at least two rectifying and filtering units. The main transformer includes at least one assistant side winding with a tap; together with the assistant side winding of the main transformer, each of the at least two rectifying and filtering units respectively forms a power supply loop; each power supply loop includes a first rectifying loop and a second rectifying loop, which are relatively used for the rectification of the positive and the negative half-cycle alternating voltage; a current-equalizing transformer is arranged between the adjacent first power supply loop and second power supply loop, the windings of the current-equalizing transformer are respectively in the rectifying loops contained in the first power supply loop and the second power supply loop, thus realizing the current equalization between the different rectifying loops in which the adjacent rectifying and filtering units are contained. The multi-path constant current drive circuit performs a good current equalization, and can reduce the volume of the current-equalizing transformer and decrease the cost.

Disclosed is a structural vibration damping device, which comprises a piezoelectric element adapted to be mounted on a structure, a shunt circuit inserted between two electrodes of the piezoelectric element, and an electric circuit for selectively opening and closing the shunt circuit. In this damping device, the electric circuit is operable, when a voltage between the electrodes of the piezoelectric element has a positive or negative extreme value due to a vibration of the structure, to close the shunt circuit so as to allow a current to flow between the electrodes of the piezoelectric element, and, when the current is reduced to zero, to open the shunt circuit so as to preclude the current flow until a voltage between the electrodes of the piezoelectric element subsequently has the extreme value. Further, each of the shunt circuit and the electric circuit is designed to be operated using only a power generated by the piezoelectric element. The damping device of the present invention makes it possible to achieve high-performance power-free damping with enhanced reliability and maintainability.

In a feed unit for feeding fuel to an internal combustion engine of a motor vehicle, inductors are arranged on the outer side of a housing component of an electric motor. The inductors are fabricated in one piece with connecting lines and have a large line cross section and therefore a particularly small voltage drop. The housing component is of particularly compact design.

In a power source circuit including a switching circuit 8 as a power conversion circuit for converting by a switching operation at least one of a frequency and a voltage of an alternating voltage from an alternating power source 2 via a pair of supply lines 3 and 4, one supply line 3 includes a fuse 5 as an excess current protection element, and between a ground line 10 and one supply line 3, a first line bypass capacitor 6 is connected. Between the ground line 10 and another supply line 4, a second line bypass capacitor 7 is connected, and another supply line 4 includes an inductor 9. With this configuration, an unbalanced state of the circuit due to the excess current protection element is reduced so as to restrain the common mode noise.

A method of path measurement uses eddy current principles and a sensor which interacts with a measuring object. The sensor has an electrical connector and a sensor coil. In accordance with the method, an operating voltage is applied to the sensor such that a magnetic field is built up by an oscillator in cooperation with the sensor coil. A measuring object may be moved in the vicinity of the sensor coil through an opening in the sensor coil to produce field strength changes adjacent to the coil and the oscillator. The field strength changes are detected by an evaluation circuit and transmitted to a microcontroller. The microcontroller processes the signals of the evaluation circuit and provides the evaluation circuit with said signals via an output and protection circuit. The sensor coil consists of a plurality of windings constructed in a planar manner.