System with telephone and base station

摘要

The system mechanism (122) provides an effective, linear power amplifier, generating a HF-RF variable signal. An effective envelope curve tracking converter (102) receives a base band signal and transmits a supply voltage in coincidence with a variable envelope curve of the base band signal. The tracking converter contains a wide band limiting imaging unit (108) receiving the base band signal for determining a reference signal, and an envelope curve tracking converter (110) receives the reference signal and is coupled to a current source (120) to transmit a supply voltage to the linear RF power amplifier (106) as a reaction to the reference signal. An RF signal generator (104) is incorporated in the system. Independent claims are included for a method for providing a linear power amplifier, a cellular telephone, a portable radio apparatus, a satellite telephone, a radio telephone and a base station.