In one embodiment, a circuit comprising a passive input network of an input impedance configured to couple an input voltage to a first circuit node; an adaptive current source configured to output an adaptive bias current to the first circuit node; a cascode device controlled by a control voltage and configured to receive a sum current from the first circuit node and output an output current to a second circuit node; and a load network of a load impedance configured to provide termination to the second circuit node, wherein the adaptive bias current is dynamically adapted to track a deterministic noise component in the input voltage.