HIGH FREQUENCY PRE-CORRECTION DEVICE FOR THE NON-LINEARITY OF SIGNAL AMPLIFIERS COMPRISING AT LEAST ONE AMPLITUDE MODULATED CARRIER SIGNAL, AND TELEVISION TRANSMITTER COMPRISING SUCH A DEVICE

摘要

The present invention relates to devices for pre-correcting at high frequency the non-linearity of power amplifiers asymmetrically amplifying the side bands of a carrier signal amplitude modulated in a wide frequency band. /P P The precorrection device according to the invention comprises a nonlinear quadrupole whose transfer curve is complementary to that of the amplifier, but whose action is made selective as a function of the frequency at using two complementary bandpass filters, with variable insertion loss with the frequency respectively preceding and following the quadrupole. /P P Application to television transmitters. /P