Mitsubishi Denki Kabushiki Kaisha

Renesas Electronics Corporation

Tsutomu Endo

Isamu Chiba

Toru Fukasawa

Moriyasu Miyazaki

Shuji Urasaki

Tetsu Ohwada

Wataru Matsumoto

Yoshihiko Konishi

Masataka Ohtsuka

Tamotsu Nishino

Yonehiko Sunahara

Shin-ichi Satoh

Makoto Takemoto

To improve the precision of temperature compensation in an infrared sensor and obtain a sharp image, a correction is applied to a variation in output voltage (referred to as 'background infrared radiation absorption intensity distribution' below) due to intensity distribution of background infrared radiation, which is light other than the incident infrared radiation on the infrared sensor, and the temperature characteristic of each individual bolometer constituting the infrared sensor. That is, the temperature of the infrared sensor is measured as a first temperature, a correction value for the output voltage of each bolometer is found by referring to a table, which indicates the background infrared radiation absorption intensity distribution versus the temperature of the infrared sensor, as well as the first temperature, and the variation in output voltage is corrected.

Method and apparatus for compensating infrared sensor for temperature

A read circuit includes: an integration circuit section configured to perform an integral operation and whose input is connected to an integration node; and a bias circuit connected between a connection node to which a variable resistive element is connected and the integration node. The bias circuit includes: an integration transistor whose source and drain are respectively connected to the connection node and the integration node; an operational amplifier whose output is connected to a gate of the integration transistor, to whose first input a bias voltage is supplied, and whose second input is connected to the source of the integration transistor; and at least one diode element that is connected between the gate and source of the integration transistor and clips a gate-source voltage of the integration transistor.

Read circuit, variable resistive element device, and imaging device

An antenna device including matching circuits corresponding to reflection coefficients of antenna elements determined by taking into account the couplings between the antenna elements occurring when the antenna elements are excited with corresponding excitation amplitudes and excitation phases at each of operational frequencies.

Antenna device provided with matching circuits adapted for reflection coefficients

When the portable wireless device of the present invention is used, the second housing with the antenna unit telescopically received therein is turned about the hinge to a spread position where the antenna unit is spread out a sufficient distance away from the housing and is extended from the second housing Hence, during communication the antenna unit is kept sufficiently far apart from the user's head to provide improved transmission and/or reception characteristics.

Portable wireless device

A composite antenna apparatus comprising a balun connected to an inner conductor at the upper end of a coaxial line,, one end of a helical element formed by a pair of wire conductors is connected to the balun, the other end is wound symmetrically around the coaxial line using the the coaxial line as a center so as to face the balun and is connected to the outer conductor,at the lower end of the coaxial line. The provision of an outer conductor connecting terminal connected to the outer conductor and an inner conductor connecting terminal connected to the inner conductor at the lower end of the coaxial line, allows the formation, on the same axis, of a helical antenna fed by the coaxial line via the helical element and a monopole antenna formed by the outer conductor of the coaxial line. Thereby equivalent gain in the horizontal plane and a reduction in the occupied volume is achieved.

Composite antenna apparatus

Antenna feeding circuit

Antenna device

Antenna apparatus for portable phones

A non-driven first linear element is disposed in the vicinity of an inverted-F second linear antenna element. The driven second linear element is disposed over a conductive plate having a flat shape, in such a manner as to be substantially parallel to the inverted-F antenna. The non-driven element has a short-circuited end of the inverted-F antenna, and has substantially the same resonant frequency as that of the inverted-F antenna.

Antenna apparatus

An antenna device includes a first antenna capable of moving between a storage position where the first antenna is contained within an equipment housing and an extended position where the first antenna is pulled out of the device housing for receiving and/or transmitting a signal. A second antenna is attached to the tip of the first antenna for receiving and/or transmitting a signal when the first antenna assumes the storage position. The rotator rotates the first antenna with respect to the device housing in the extended position.

Retractable, extendable and rotatable dual antenna system

A slot antenna includes a plate-like conductor provided vertically on the upper surface of the metallic cabinet and having a recess, whose length is equal to the half wavelength relative to a using frequency and whose depth is sufficiently smaller than the wavelength. Such a slot antenna is supplied with power to excite a half-wavelength conductor provided in the neighborhood thereof in a non-contact state through a electrostatic capacitive coupling.

Growing community of inventors

Tokyo, Japan

Tsutomu Endo