Method and apparatus for enhancing transmitter circuit efficiency of mobile radio units

摘要

A circuit that increases the efficiency of a radio frequency mobile unit (10) is disclosed. When the mobile telephone unit is within a certain signal strength range of the base station, the power amplifying circuit (16) is removed from the transmission circuitry (by 20,22). However, when the signal strength between the base station and the mobile unit is low, the power amplifier is turned on and the transmitted signal (from 14) is amplified before being sent over the mobile unit's antenna (13).