a method is for reducing a dc component of an input signal transposed into baseband and being generated by a first frequency transposition stage starting from an initial signal and from a transposition signal . the method includes amplifying the transposed input signal in a first amplifier . the first amplifier receives at a dc offset compensation input , a compensation signal extracted from an output signal of a second amplifier subjected to a compensation of a offset dc voltage of the second amplifier . the method also included alternating between receiving at an input of the second amplifier , a first auxiliary signal from an auto - transposition of a transposition signal in a second frequency transposition stage and a second auxiliary signal from a transposition of the initial signal in the second frequency transposition stage with the transposition signal .