Sanyo Electric Co., Ltd.

Kyocera Corporation

Hitoshi Tsuchiya

Tetsuro Asano

Toshikazu Hirai

Tetsuyuki Taniguchi

Provided is a transmission output control apparatus including: a level control circuit operable to adjust a level of an inputted signal; a power amplifying circuit including a plurality of amplifying stages and being operable to amplify the signal whose level has been adjusted by the level control circuit; an antenna operable to transmit the signal amplified by the power amplifying circuit; a memory unit operable to prestore a plurality of control signals; a control signal generating unit operable to select and extract, from the memory unit, one of the control signals that is in accordance with a transmission level instructed by a base station, and supply the extracted control signal to the level control circuit; and a detection unit operable to detect a signal at a midway amplifying stage of the power amplifying circuit, where a transmission level of the level control circuit is monitored according to an output of the detection unit.

Transmission output control apparatus

A switching device receives two pairs of balanced signals and outputs one of the two pairs of the signals. The device is composed of two SPDT switches which share two control signals provided to the gates of the FET of the SPDT switches. The package of the device has eight external electrodes on the back side of the package. The eight external electrodes are configured so that they are aligned symmetrically with respect to the center line of the package. The device requires only a small package space and is suitable for mobile communication application such as cell phone accommodating CDMA and GPS signals.

Growing community of inventors

Nara, Japan

Hitoshi Tsuchiya