A system and method for controlling input buffer biasing current include
an input buffer circuit with an input current detector circuit configured
to generate a plurality of discrete biasing control signals. At least one
input buffer is configured to adjust the biasing current in response to
the plurality of discrete biasing control signals. The plurality of
discrete biasing control signals is generated in response to variations
in biasing current of the at least one input buffer. The method compares
a representative bias current indicator from a replica of an input buffer
with a reference current to determine variations in biasing current of at
least one input buffer. A plurality of discrete biasing control signals
is generated indicating a configuration of a biasing control for the at
least one input buffer. The at least one input buffer is biased according
to the plurality of discrete biasing control signals.