Method and apparatus for amplification of a amplitudes - and phase-modulated electrical signal

摘要

A process for the amplification of a amplitudes - and phase-modulated electrical signal in a polar - loop - transmitter, in which the phase and the amplitude of the electric signal (u_mod) separately from one another by means of a phase control loop (1, 3) and a amplitudes as a rule, the circle (2, 4, 7, 8) in each case by comparison with a reference value or can be readjusted, wherein the input end to the electrical signal (u_mod) the action of the phase-locked loop (1, 3) an input signal of an amplifier unit (5, 6) and the likewise on the input side to the electrical signal (u_mod) amplitudes, which is acted upon by a circle (2, 4, 7, 8) a control voltage (u_Ldo) the amplifier unit (5, 6) generates,characterized by the,– that the crest - factor of the output signal of the amplifier unit (5, 6) is determined and is compared to a set value, and– that in the case of a deviation of the crest - factor from the desired value as a rule, the amplification of the amplitudes circle (2, 4, 7, 8) in a the control voltage (u_Ldo) generating''s (2, 4) or in a the reference values of the phase and the amplitude generating feedback branch..