Tdk Corporation

Reiji Okuno

Takakazu Imai

Hiroyoshi Nakajima

Takeo Gokita

Junya Fukuda

Takuya Daigo

Provided is a magnetic field detection device and a current sensor capable of increasing the degree of freedom in selecting the type of the magnetic field detection element. A magnetic field detection deviceincludes a conductorthat generates a magnetic field; a C coreprovided so as to surround the conductor; and a magnetic field detection elementthat detects a magnetic field. The C corehas a gap G, and the magnetic field detection elementis disposed at a position where the magnetic field generated from the conductorcan be detected, the position being outside the gap G. Since the direction of the magnetic flux varies outside of the gap Gfrom place to place, the direction of the magnetic flux that passes through the magnetic field detection elementcan be arbitrarily selected by arbitrarily selecting the installation location of the magnetic field detection element. Therefore, the degree of freedom in selecting the type of the magnetic field detection elementis increased.

Magnetic field detection device and current sensor

A magnetic coupling-type isolator includes a primary coil configured to generate a first magnetic field in accordance with an input signal, a bias coil configured to generate a second magnetic field in accordance with a bias signal, a first magneto-resistive element having a magnetic resistance increased by the first magnetic field and decreased by the second magnetic field, a second magneto-resistive element having a magnetic resistance decreased by the first magnetic field and increased by the second magnetic field, and a comparator configured to output an output signal in accordance with a difference between the magnetic resistance of the first magneto-resistive element and the magnetic resistance of the second magneto-resistive element.

Signal transmitting device having output circuit for voltage comparison

A digital signal transmitting apparatus includes an encoder which converts parallel input signals of multiple channels into serial data in a manner synchronized with a first clock signal, and a decoder which converts the serial data into parallel output signals of the multiple channels in a manner synchronized with a second clock signal operating in a manner asynchronous with the first clock signal. The serial data has a different period and a different duty factor corresponding to each combination of the logical values of the parallel input signals of the multiple channels.

Growing community of inventors

Tokyo, Japan

Reiji Okuno