Systems and methods for sensor drift compensation

A system, comprising:

• a primary sensor having a primary full-scale range and configured to output a primary environmental condition signal indicative of an environmental condition;
• a reference sensor having a reference full-scale range and configured to output a reference environmental condition signal indicative of the environmental condition, wherein the reference full-scale range is less than the primary full-scale range;
• and
• a drift compensation system comprising:
• a comparator configured to:
• determine a first condition if a first value of the reference environment condition signal is within the reference full-scale range, and
• determine a second condition if a second value of the reference environment condition signal is greater than the reference full-scale range;
• counter circuitry configured to:
• iteratively generate a first condition-dependent compensation signal responsive to the determined first condition, wherein the first condition-dependent compensation signal is summed with the primary environmental condition signal to produce a drift-compensated output that iteratively tracks the reference environmental condition signal;
• and
• generate a second condition-dependent compensation signal responsive to the determined second condition, wherein the second condition-dependent compensation signal is summed with the primary environmental condition signal to produce the drift-compensated output, wherein the second condition-dependent compensation signal comprises an offset value, wherein the offset value is determined based on a difference between a threshold primary environmental condition signal and a threshold reference environmental condition signal, wherein the threshold signals are determined based on the reference environmental condition signal being substantially equal to the reference full-scale range.