The receiver has an input for amplitude sampled signals, and a non-linear amplifier. There is a low pass filter feedback circuit between the output of the amplifier and the input, for feedback of a low frequency component. The working point of the non-linear amplifier is shifted in the direction corresponding to a reduced amplification, when a signal, which is not an amplitude modulated signal, is received at the input. This action reduces the standing DC current supply demand by the receiver. ADVANTAGE - Extended battery life due to low standby current in receiver.