Patent ID: 8248055

Claim:
An article of manufacture containing a voltage reference providing an output reference voltage on an output reference node, said output voltage reference for driving a plurality of external components, each external component offering a load at said output node, said article of manufacture comprising: the voltage reference including: a) a voltage generator to generate a voltage signal at a first inverting node; b) a first signal path between said first inverting node and said output node including a fixed part, wherein said voltage signal is provided via said first signal path to said output node, said first signal path being characterized by a first resistance; c) a second signal path coupled between an output of the amplifier and said output node, wherein said second signal path is characterized by a second resistance, d) a capacitor also having an effective series resistance coupled to the second signal path and also coupled to the ground; e) a programmable resistance in series with said first resistance in said first signal path, wherein said programmable resistance includes switches that configure resistances of aid programmable resistance to be either inside or outside of a feedback path of a buffer of said article of manufacture, to vary a magnitude of said programmable resistance, thereby altering the first resistance, the plurality of external components including: a frequency detector block to measure a frequency of a sampling clock used in sampling an input signal containing an input sample, and to set said programmable resistance to a specific value according to said frequency, such that there is a matching between a total fixed part resistance plus programmable part resistance that is equal to the effective resistance, wherein the effective resistance changes as a result of at least of said change of frequency, whereby a non-linearity of said output node can be reduced by varying said magnitude of said programmable resistance of said buffer of said voltage reference.