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

摘要

1. A high-frequency pre-correcting device for correcting the non-linearity of an amplifier, amplifying at least one amplitude-modulated carrier signal, and having a total band width B, dissymmetric with respect to the carrier signal, B being equal to B1 + B2 , wherein B1 is that portion of the band which is substantially symmetric with respect to the carrier signal, and B2 is the remaining portion of said band, said device (8) comprising at least one four-pole (80) having, at least in part, a transfer curve complementary to that of the amplifier (12), characterized in that said four-pole (80) is preceded and followed, respectively, by a first and second pass-band filter (30 and 31), each one of said filters having two distinct contiguous pass-bands the respective widths of which are substantially equal to B1 and B2 , respectively, and between which each filter has a mean insertion loss interval P, said intervals P having mutually opposed values for said first and second filters.