Matsushita Electric Industrial Co., Ltd.

Murata Manufacturing Co., Ltd.

Chikara Yoshida

Satoshi Tanaka

Satoshi Arayashiki

Kazuo Watanabe

Fumio Harima

Tatsuya Shimoji

Hiroyuki Waki

Makoto Itou

Shusuke Haruna

Toshikazu Terashima

A power amplifier apparatus includes a semiconductor substrate, a plurality of first transistors on the semiconductor substrate, a plurality of second transistors, at least one collector terminal electrically connected to collectors of the plurality of first transistors, a first inductor having a first end electrically connected to the collector terminal and a second end electrically connected to a power supply potential, at least one emitter terminal electrically connected to emitters of the plurality of second transistors and adjacent to the collector terminal in a second direction, a second inductor having a first end electrically connected to the emitter terminal and a second end electrically connected to a reference potential, and at least one capacitor having a first end electrically connected to the collectors of the plurality of first transistors and a second end electrically connected to the emitters of the plurality of second transistors.

Power amplifier apparatus

A digital broadcast system includes a receiving device, one or more communication devices, and a broadcast station device. The receiving device includes a receiver for receiving a digitally broadcast program; a presentor for presenting the program received by the receiver to a viewer; and means for sending program ID information that specifies either the presented program or a program related to the presented program. Each of the communication devices receives the sent program ID information and sends communication device ID information to the broadcast station device together with the received program ID information. The broadcast station device receives the program ID information and the device ID information, and sends viewer targeted program specific service information to each of the communication devices identified by the received device ID information.

Digital broadcast system and its component devices that provide services in accordance with a broadcast watched by viewers

Growing community of inventors

Kyoto, Japan

Chikara Yoshida