Post-sampling selectable gain in sample and hold analog-to-digital converters

An integrated circuit, comprising:

• a plurality of reference generators;
• a reference selector coupled to the plurality of reference generators;
• one or more processors coupled to the reference selector;
• and
• a sampler circuit coupled to the reference selector,
• wherein the plurality of reference generators is configured to:
• scale down or scale up a reference voltage to generate a plurality of candidate voltages associated with a plurality of measurement accuracies of a sampler circuit, each candidate voltage of the plurality of candidate voltages is respectively associated with a respective measurement accuracy of the plurality of measurement accuracies;
• wherein the one or more processors are configured to:
• select, using the reference selector and based on an input voltage for the sampler circuit, a particular candidate voltage from the plurality of candidate voltages that is associated with an optimal measurement accuracy of the plurality of measurement accuracies;
• and
• wherein the sampler circuit is configured to:
• generate a sampler voltage associated with the optimal measurement accuracy by operating the sampler circuit based on the particular candidate voltage or an additional voltage associated with the particular candidate voltage.

A method comprising:

• receiving a plurality of candidate voltages associated with a plurality of measurement accuracies of a sampler circuit, each candidate voltage of the plurality of candidate voltages is respectively associated with a respective measurement accuracy of the plurality of measurement accuracies;
• selecting a particular candidate voltage from the plurality of candidate voltages that is associated with an optimal measurement accuracy of the plurality of measurement accuracies;
• and
• forwarding the particular candidate voltage to permit a sampler circuit to generate, based on the particular candidate voltage, a sampler voltage associated with the optimal measurement accuracy.