RECEPTION COMPARATOR FOR SIGNAL MODULATION UPON A SUPPLY LINE

A receiving stage for a multi-stage signal modulated upon a supply voltage, including: a supply potential terminal and a ground potential terminal, a voltage divider and a low-pass filter, whose input is connected to the supply potential terminal and the ground potential terminal, and which has an output which is arranged to output the low-pass filter output signal. The stage also includes a high comparator having an high threshold value, an output and a receiving signal input that is connected to the output of the low-pass filter and is arranged to receive the low-pass filter output signal; a low comparator having a low threshold value, an output and a receiving signal input that is connected to the output of the low-pass filter and is arranged to receive the low-pass filter output signal; and a high threshold value generator which is arranged to raise the high threshold value if the low-pass filter output signal is less than the high threshold value, and to lower the high threshold value if the low-pass filter output signal is greater than the high threshold value. Finally, the stage includes a low threshold value generator which is arranged to raise the low threshold value if the low-pass filter output signal is less than the low threshold value, and to lower the low threshold value if the low-pass filter output signal is greater than the low threshold value. A method for receiving a multi-stage signal is also provided which operates according to the operating principle of the receiving stage.