A down-conversion module for a heterodyne receiver comprises a first mixer circuit, a second mixer circuit and an interconnection. The first mixer circuit includes first and second differential control terminals and is arranged to produce a first down-converted differential voltage signal at a first down-converted frequency as a function of a first RF differential input signal applied to the first differential control terminals and of a first RF differential reference frequency signal applied to the second differential control terminals. The second mixer circuit includes two differential pairs of second amplifier elements and the second amplifier elements comprise second differential control terminals and cross-connected pairs of second amplifier output paths for producing a second down-converted differential voltage signal at a second down-converted frequency as a function of the first down-converted differential voltage signal and of a second RF differential reference frequency signal applied to the second differential control terminals. The interconnection includes transmission line elements and is arranged to apply a differential current signal which is a function of the first down-converted differential voltage signal to differential input terminals of the second mixer circuit common to respective pairs of the second amplifier elements.