High frequency radio transmitter operating method, for linearized amplifier system, controlling amplifier voltage supply according to measured modulation envelope

摘要

A high frequency radio transmitter (1) with amplification linearized by envelope or Cartesian feed back or by feed forward correction, controls (13) the current / voltage supply (Uv) to amplifier stages (8, 9) so as to provide class A or class AB operation respectively. The control is performed in accordance with the measured amplitude of the baseband signal processor input (15) signal envelope (Uen), a delay stage (4) being used to compensate for the response time of the control unit. An Independent claim is included for a high frequency transmitter.