Bridgestone Corporation

Nec Corporation

Bridgestone Corportion

Yasuhiro Hamada

Yasuo Himuro

Kenichi Maruhashi

Shuya Kishimoto

Naoya Ochi

Masaharu Ito

Takao Morimoto

Keiichi Ohata

Masamichi Wakamatsu

Toru Tsuda

Masahiro Tanomura

Naoyuki Orihashi

Masaharu Itou

Shuuya Kishimoto

A bias circuit according to the present invention includes a resistor layerwhich is placed above a substrateand connected to a ground potential, and a conductorfor forming an inductorplaced above the resistor layer. Further, a manufacturing method of the bias circuit according to the present invention generates the resistor layerabove the substrateand is connected to the ground potential, and generates the conductorfor forming the inductorabove the resistor layer. The present invention can provide a bias circuit and a manufacturing method of the bias circuit that enables easy integration on a semiconductor substrate and prevents parasitic oscillation.

Bias circuit and method of manufacturing the same

A wireless communication device according to the present invention includes high-frequency circuitstothat convert an input signal into a high-frequency signal; a power detection circuitthat detects power of the high-frequency signal output from the high-frequency circuitsto; a common correction circuitthat performs a common correction on the signal output to the high-frequency circuitstoto reduce local leaks occurring in the high-frequency circuitsto, according to the power of at least one high-frequency signal detected by the power detection unit; and an individual correction circuitthat performs a correction for each signal output to the high-frequency circuitstoto reduce local leaks occurring in the high-frequency circuitsto, according to the power of each high-frequency signal detected by the power detection unit

Wireless communication device, high-frequency circuit system, and local leak reduction method

A balun circuit comprising first through third CPW lines becoming signal I/O ports, a first differential transmission line for linking the central conductor of the second CPW line and the ground conductor of the first CPW line and for linking the ground conductor of the second CPW line and the central conductor of the first CPW line, a second differential transmission line for linking the central conductors of the first and third CPW lines and for linking the ground conductors of the first and third CPW lines, and a joint for connecting at least two ground conductors of the first through third CPW lines. The differential transmission line has a first line formed in a dielectric layer on a substrate, a second line arranged in the underlying layer, and an underlying line at a fixed potential arranged between the substrate and the second line.

Balun circuit and integrated circuit device

The present invention intends to improve communication efficiency between two communication apparatuses each engaged in the communication by full duplex communication method by using a surplus band of the one to transmission band of the other. A first bandwidth required by a first communication apparatus (A) at data transmission and a second bandwidth required by a second communication apparatus (B) at data transmission are presumed. Next, the first bandwidth presumed as mentioned is compared to a first bandwidth used which the first communication apparatus (A) currently uses and at the same time, the second bandwidth presumed as mentioned is compared to a second bandwidth used which the second communication apparatus (B) currently uses. The first bandwidth and the second bandwidth are then adjusted, and a third bandwidth which the first communication apparatus (A) uses at data transmission and a fourth bandwidth which the second communication apparatus (B) uses are determined.

Band control method and communication apparatus

A balun circuit includes a first CPW line, a second CPW line, and a third CPW linethat serve as signal input/output ports; a first CPS linethat is a differential transmission line, the first CPS linerelaying the first CPW lineto the second CPW line; a second CPS linethat is a differential transmission line, the second CPS linerelaying the first CPW lineto the third CPW line; and at least one connection section that connects grounded conductors of each of the first CPW line, the second CPW line, and the third CPW line

Automobile tire

Growing community of inventors

Tokyo, Japan

Yasuhiro Hamada