Circuit and method for controlling the power used by a portable radiotelephone

摘要

A circuit and method for controlling the power associated with a power amplifier in a portable radiotelephone includes a power amplifier, a power supply, a power supply controller, connected between the power supply and the above power amplifier, for adjusting the voltage applied to the power amplifier, and a control unit, connected to the power supply controller, for controlling the adjusted voltage of the power supply controller according to the transmitting power required in a region of a strong or weak electric field, and/or required in a one of dual (FM/CDMA) modes.