Mobile radio communication apparatus adaptable to power supply voltage change

摘要

A mobile radio communication apparatus powered by a limited-capacity power supply includes a transmission amplifier producing a transmission output in accordance with command data from a base station. The driving voltage for the amplifier from the power supply may change due to the lapse of time. A memory stores control data for maintaining a desired operation of the amplifier with the dissipation current thereof minimized when the power supply voltage changes. The driving range of the amplifier is controlled in accordance with the stored control data.