Fujitsu Corporation

Hiroyuki Kadosono

Setsuo Yoshida

Hidefumi Takaoka

Ryoko Tamura

Tadashi Nakano

Toshitsugu Kobayashi

Masaki Bansho

Kouji Sakata

Syoichi Urata

Yutaka Aoki

Shinji Kuriyama

An optical-switch driver circuit includes a pulse signal source and a voltage-applying circuit. The pulse signal source generates pulse waves that rise from a first voltage to a second voltage. The voltage-applying circuit, for one of the pulse waves, outputs a voltage higher than the third voltage, then outputs a voltage lower than the third voltage, and further outputs the third voltage.

Optical-switch driver circuit, optical switch, and optical changeover switch

A wireless communication terminal including a wireless communication unit for receiving and transmitting voice signals between terminals connected through a voice channel and a data channel, a signal input/output unit for inputting and outputting voice signals for voice communication and a mixing unit, interposed between the wireless communication unit and signal input/output unit, for performing mixing operations to create a first mixed signal to be output to said signal input/output unit and second mixed signals each to be transmitted to the corresponding terminal. The wireless communication terminal is preferably used for wireless voice communication performed by three or more terminals without being interposed by a center apparatus (such as a server) or a repeater. Further, signal-receiving/transmitting is set for each wireless communication terminal whereupon convenience can be improved.

Wireless communication terminal

Growing community of inventors

Fukuoka, Japan

Hiroyuki Kadosono