Asahi Kasei Emd Corporation

Other

Kazutoshi Ishibashi

Masataka Yamashita

Masayuki Sato

Ichiro Shibasaki

Edson Gomes Camargo

Toshinori Takatsuka

Koji Shibahara

Yoshinori Yanagita

Shuichi Nagano

Hidetoshi Endo

An infrared sensor capable of more highly accurately correcting an electrical signal converted by a light receiving unit is provided. An infrared sensor () converts energy of infrared rays radiated from an object (for example, human body) to an electrical signal and outputs the electrical signal, the infrared sensor comprising: a light receiving unit () that includes a quantum type infrared detection element () and that converts the energy of the infrared rays to an electrical signal; and a correction unit () that corrects the output signal from the light receiving unit (), wherein the light receiving unit () and the correction unit () are formed of the identical material on the identical substrate () and have the identical configuration so that the infrared rays enters in an identical manner.

Infrared sensor

A pointing device is provided which facilitates the assembly, achieves downsizing and has a long life. Magnetic sensorsare placed symmetrically two by two along an X axis and Y axis on a printed circuit board. A switchis placed on a silicone resinside surface of the printed circuit boardto provide a switch function achieved by depressing a magnet covertoward the magnet. The pointing device, a device for outputting coordinate values of an input point, can not only output the coordinate values, but also make a decision by the switch function. A silicone resinis easy to deform caused by an external force, and returns its initial state without the applied external force as soon as the external force is removed.

Pointing device

A current measuring method capable of reducing the size of a current sensor while ensuring electric insulation easily and suitable for enhancing reliability by preventing heat generation. A current measuring device comprises a printed board () having a conductor for measurement (), and a noncontact current sensor () being mounted on the printed board (), wherein the current sensor () is mounted on the surface () of the printed board () opposite to the side provided with the conductor for measurement (). Since the current sensor () is mounted on the rear surface (), electric insulation between the secondary conductor of the current sensor () and the conductor for measurement () can be ensured relatively easy.

Current measuring method and current measuring device

A magnetic sensor with a signal processing circuit includes a magnetic sensor section composed of a compound semiconductor thin film or a magnetic thin film, and a signal processing circuit for amplifying a magnetic signal the magnetic sensor section detects as an electrical output. The signal processing circuit includes an operational amplifier and a constant current circuit for carrying out feedback. The constant current circuit in the signal processing circuit includes a plurality of resistors with two or more different temperature coefficients, and the current output from the constant current circuit has a temperature coefficient inversely proportional to the temperature coefficient of the combined resistance of the plurality of the resistors.

Magnetic sensor with a signal processing circuit

Growing community of inventors

Fuji, Japan

Kazutoshi Ishibashi