A receiver of a high speed digital interface includes at least one differential amplifier, a pair of resistive elements, a current source and a pair of transistors. The differential amplifier receives a small differential signal at a pair of input terminals and outputs an amplified differential signal. Each of the resistive elements has one end coupled to one of the input terminals of the differential amplifier and the other end receiving a reference voltage. The pair of transistors has drains respectively coupled to the input terminals of the differential amplifier, sources commonly coupled to the current source and gates receiving a differential feedback signal derived from the amplified differential signal.