POLAR LOOP CIRCUIT ARRANGEMENT WITH DISTORTION SUPPRESSION AND METHOD FOR DISTORTION SUPPRESSION IN A POLAR LOOP CIRCUIT ARRANGEMENT

摘要

The invention relates to a polar loop circuit arrangement (1), for the generation and amplification of amplitude and phase modulated signals (f A), comprising at least: a power amplifier (4), an amplitude and a phase-lock loop (1.1, 1.2). A signal modulation is carried out by means of the amplitude and phase lock loop (1.1, 1.2) and the modulation signal (fs, As) is applied to the input (4.1, 4.2) of the power amplifier (4) for signal amplification and signal distortions, in particular, in the form of AM/PM conversion (6), occur between the input (4.1, 4.2) and output (4.3, 4.4) of the power amplifier (4), which are reduced within a loop bandwidth of the lock loops (1.1, 1.2), whereby at least one transmission link (10, 12) is arranged before the input (4.1, 4.2) of the power amplifier (4) and between the amplitude lock loop (1.2) and the phase lock loop (1.1) for further reduction of signal distortion, which derives a correction signal (11) from the amplitude lock loop (1.2) and injects the same to the phase lock loop (1.1).