In situ strain compensation afe

A circuit comprising:

• a current source circuit configured to generate a source current at a current source output terminal, the source current having a first, bias current component, and a second, compensation current component;
• a voltage reference circuit configured to generate a reference voltage at a voltage reference output terminal, wherein the voltage reference output terminal is coupled to the current source output terminal, and wherein the voltage reference circuit is configured to sink the first, bias current component of the source circuit;
• and
• a strain compensation circuit having an input terminal connected to the output terminal of the voltage reference circuit, and having a strain compensation circuit output terminal, wherein the strain compensation circuit is configured to source or sink the second, compensation current component, generate a strain compensation voltage based on the second, compensation current component, and combine the reference voltage and the strain compensation voltage to form a compensated reference voltage at an output terminal of the strain compensation circuit.

A method comprising:

• generating a reference voltage using a voltage reference circuit, the generated reference voltage provided at an output terminal of the voltage reference circuit, wherein the reference voltage comprises a first transfer function of voltage with respect to strain;
• generating a strain compensation voltage using a strain compensation circuit that has an input terminal connected to the output terminal of the voltage reference circuit, wherein the strain compensation voltage comprises a second transfer function of voltage with respect to strain that is substantially opposite that of the first transfer function;
• and
• combining the reference voltage with the strain compensation voltage to form a compensated reference voltage, and outputting the compensating reference voltage at an output terminal of the strain compensation circuit.