BUZZER DEVICE, BUZZER DRIVING SYSTEM AND METHOD THEREOF

Optimization of automatic gain control for narrow bandwidth operation

Method and system for gain control in a communications device

Variable gain amplifier embedded in a reception chain

Preamplifier circuit configuration

Optimization of automatic gain control for narrow bandwidth operation

Optimization of automatic gain control for narrow bandwidth operation

Radio communication apparatus

Method, RF module and test method for enabling power amplifier to support multiple powers

Transmission power control device

Switchable power level detector for multi-mode communication device

Automatic gain control device, automatic gain control method, control program for automatic gain control device, radio communication terminal having automatic control device, radio communication system, and radio communication method

Method for controlling power level of received signal in ultra wide band transmission system