A direct conversion type of frequency transposition device includes a transconductor block receiving the input signal and a current switching block connected to the output from the device. At least the common mode (I.sub.if1+I.sub.if2) is servocontrolled to static output currents from the frequency transposition device on a current proportional to a reference current (I.sub.ref) and independent of the static output currents from the transconductor block.