Measurement circuit

A measurement circuit for monitoring at least one parameter of an input signal received from an external signal source, the measurement circuit comprising:

• at least one first measurement element coupled to the input signal and configured to provide an analog output signal indicative of a respective one or more of the at least one parameter of the input signal;
• an analog to digital converter (ADC) coupled to receive a signal indicative of the analog output signal at a first input and a reference voltage at a second input and configured to provide a digital output signal representative of the analog output signal at an output thereof, wherein the ADC has an associated gain and a gain level, the ADC gain related to a voltage level of the reference voltage;
• at least one second measurement element configured to have a characteristic indicative of a stress condition associated with the at least one first measurement element;
• and
• a compensation circuit responsive to an output of the at least one second measurement element and to a reference signal to generate a compensation signal indicative of a difference between the output of the at least one second measurement element and the reference signal, the difference indicating a change from a calibrated level for the stress condition associated with the at least one first measurement element, wherein the voltage level of the reference voltage is adjusted in response to the compensation signal.