A device receives a 1-bit amplitude-modulated input signal. The device includes a differential amplifier circuit with first and second differential inputs, wherein the first input is configured to receive the input signal and the second input is configured to receive a common-mode signal having a variable value. The device also includes a circuit for modifying the value of the common-mode signal as a function of the value of an output signal of the receiver device obtained from an output signal of the differential amplifier circuit.