Kabushiki Kaisha Toshiba

Citizen Watch Company, Ltd.

Shinshu University

Hioki Denki Kabushiki Kaisha

Citizen Finedevice Co., Ltd.

Toshiro Sato

Tetsuhiko Mizoguchi

Michio Hasegawa

Hiroshi Tomita

Atsuhito Sawabe

Masashi Sahashi

Yuji Ide

Tomoharu Tanaka

Hiromi Fuke

Tetsuo Inoue

Yuji Iseki

Kunio Matsukura

Isamu Yanase

Yoshihiko Yamaguchi

Yasunori Iwamoto

Yoichi Tokai

Koichi Yanagisawa

Toshiya Kubo

Mitsunori Miyamoto

Fuchun Zhang

To provide a magnetic sensor element and a magnetic sensor device that can be easily manufactured and can reduce a loss of light to the extent possible. The above-described problem is solved by a magnetic sensor element comprising a planar lightwave circuit () provided with a light branching part (), an input optical fiber () and an output optical fiber () connected to the planar lightwave circuit (), a metal magnetic body type light transmitting film () that is provided on one end surface of the planar lightwave circuit () and transmits light entered from the input optical fiber (), and a reflecting film () that is provided on the metal magnetic body type light transmitting film () and reflects the transmitted light. The output optical fiber () is a polarization-plane maintaining optical fiber, and the input optical fiber () and the output optical fiber () are aligned and connected to the planar lightwave circuit ().

Magnetic sensor element and magnetic sensor device

The invention is aimed to analyze the characteristics of a transmission line only by inputting the specific distributed parameters without mesh dividing the transmission line to be analyzed into minimal unit required for the analysis. An arithmetic operation sectionsolves a differential equation regarding electromagnetic interaction of each line segment based on the predetermined distributed parameters, including a distributed self-inductance L, a distributed resistance R, and a distributed capacitance cand a distributed conductance gin relation to a reference potential plane in the transmission line, and a distributed mutual inductance M, a distributed capacitance C, and a distributed conductance Gbetween the transmission line and another transmission line, which are input from an input section, and calculates the characteristic data of the transmission line.

Apparatus and computer readable medium having program for analyzing distributed constant in a transmission line

Disclosed herein is a planar magnetic element comprising a substrate, a first magnetic layer arranged over the substrate, a first insulation layer arranged over the first magnetic layer, a planer coil formed of a conductor, having a plurality of turns, arranged over the first insulation layer and having a gap aspect ratio of at least 1, the gap aspect ratio being the ratio of the thickness of the conductor to the gap between any adjacent two of the turns, a second insulation layer arranged over the planar coil, and a second magnetic layer arranged over the second insulation layer. When used as an inductor, the planar magnetic element has a great quality coefficient Q. When used as a transformer, it has a large gain and a high voltage ratio. Since the element is small and thin, it is suitable for use in an integrated circuit, and can greatly contribute to miniaturization of electronic devices.

Planar magnetic element

The present invention provides a magnetic-field sensor using a magnetic substance. In the magnetic-field sensor, a transmission-line element constituted of a conductor layer, dielectric layer and a magnetic layer is inserted in a feedback circuit of a phase-shift type oscillation circuit using an open-loop operational amplifier as an amplifier. An output of the operational amplifier is fed back to an input thereof through the transmission-line element. Thus, a variation in oscillation frequency depending upon the intensity of an external magnetic field is detected as an output of the sensor.

Phase-shift type magnetic-field sensor using a magnetic substance

A planar magnetic device in which the high-frequency loss in the coil conductor can be reduced. The device comprises a planar coil formed of a coil conductor constituted by a plurality of conductor lines. The coil conductor is provided in the form of a spiral. The planar coil is interposed between two insulating layers which are sandwiched between two soft-magnetic layers.

Planar magnetic device

A electronic device is disclosed having an underlying conductor formed in a predetermined pattern on a surface of an underlying insulator and made of at least one member selected from the group consisting of Ti, Ta, Mo, Cr, Nb and W and their alloy, a main conductor made of Cu formed in a predetermined pattern on the underlying conductor, a first coating conductor made of at least one member selected from the group consisting of Ti, Ta, Mo, Nb and Ni and their alloy, and a second coating conductor made of at least one member selected from the group consisting of Au and Al and their alloy that are formed in this order so as to coat a surface of the main conductor made of Cu facing the surrounding insulator.

Electronic device and magnetic device

Disclosed is a dc-to-dc converter comprising a switching transistor, a pulse-width modulation controller, a sandwich-type planar inductor, which accumulates an electromagnetic energy at ON state and releases the accumulated electromagnetic energy at OFF state of the switching transistor, a smoothing capacitor, a rectifying element, and a planar search coil for detecting an overcurrent flowing the planar coil, disposed on one of the outer surfaces of the soft magnetic layers constituting the planar inductor.

Magnetic element for power supply and DC-to-DC converter

A micro power supply device using a switching element includes a lateral MOSFET, an inductor, a rectifier and a controller. The lateral MOSFET PWM-switches the output voltage of the direct-current power supply at a low loss. The rectifier rectifies the output voltage of the direct-current power supply PWM-switched by the lateral MOSFET. The inductor is provided between the direct-current power supply and the lateral MOSFET. The controller supplies a PWM control signal to the gate electrode of the lateral MOSFET in response to the output voltage of the rectifier.

Micro power supply device using switching element

Magnetic element for power supply and dc-to-dc converter

A power supply unit including DC-DC converter using a thin and planar inductor arranged in an IC memory card incorporating an EEPROM memory chip, wherein a voltage is adjusted by a dropping regulator, thereby reducing power consumption. The thin and planar inductor includes, stacked on a semiconductor substrate, a planar coil and magnetic thin films formed to sandwich the planar coil, so that an entire area of an IC card can be decreased. The IC card can be driven by a single power supply, thus providing a compact portable information device which can be driven by a battery for a long time.

Power supply unit for an IC memory card

A high frequency magnetic property measuring apparatus for soft magnetic film includes a magnetic detection device for detecting the intensity of magnetization in a sample material, a high frequency magnetic field generator for generating magnetic field, a power source for supplying current to the magnetic field generator, and a data processing device for getting high frequency magnetic parameters of the sample by using a detection signal output from the magnetic detector. The magnetic field generator is made up of a plane-shaped coil of a conductor having a configuration in which both ends of the plane-shaped coil are closed to form a cavity as a second internal cavity in which the detector is placed. The magnetic detector is made up of a plane-shaped coil of a conductor having a configuration in which both ends of said plane-shaped coil are closed to form a cavity as a first internal cavity in which the sample material is placed. The magnetic detector is placed in the magnetic field generator.

High-frequency magnetic property measuring apparatus with wound

An amorphous magnetic thin film possesses as at least part of a thin film forming area a microstructure composed of a first amorphous phase containing at least either of iron and cobalt and bearing magnetism and a second amorphous phase disposed round the first amorphous phase and containing boron and at least one element selected from among the elements of the 4B Group in the Periodic Table of Elements and exhibits uniaxial magnetic anisotropy in the plane of film. The amorphous magnetic thin film possesses soft magnetism concurrently satisfying high saturation magnetization and high resistivity and, at the same time, easily acquires high frequency permeability by applying magnetic field in the hard axis of magnetization. Use of these amorphous magnetic thin films for plane magnetic elements permits the plane magnetic elements to be miniaturized and to be endowed with exalted performance. The amorphous magnetic thin film possesses a composition substantially represented by the formula:

Growing community of inventors

Yokohama, Japan

Toshiro Sato