LINEARITY CORRECTION METHOD AND LINEARITY CORRECTOR FOR POWER AMPLIFIER AND AMPLIFIER EQUIPPED WITH SUCH CORRECTEUR

摘要

The invention relates to the linearity correction of power amplifiers.A pre-distortion of the signal to be amplified (E) is performed, in a complementary modulation circuit (1), from coefficients contained in the tables of FIG. a memory circuit (3). A detection circuit (2) gives the address of the coefficients for the complementary modulation, as a function of the modulation of the signal to be amplified; two frequency transposers (4, 7) respectively receive the signals to be amplified (E) and amplified (S); a processor (5) studies the ratio between the transposed signals to modify, if necessary, the coefficients.Application to power amplifiers, especially in radio frequencies. / P