Systems and Methods for Resistance Compensation in a Temperature Measurement Circuit

A temperature measurement system, wherein the temperature measurement system comprises:

• a transistor;
• a variable current source;
• wherein the variable current source is electrically coupled to the transistor;
• wherein the variable current source is operable to provide a first current, a second current, a third current and a fourth current;
• wherein the first current produces a first base-emitter voltage on the transistor;
• wherein the second current produces a second base-emitter voltage on the transistor;
• wherein the third current produces a third base-emitter voltage on the transistor;
• and wherein the fourth current produces a fourth base-emitter voltage on the transistor;
• and
• an analog to digital converter, wherein the analog to digital converter is operable sample and integrate the first base-emitter voltage while applying a first gain, wherein the analog to digital converter is operable sample and integrate the second base-emitter voltage while applying a second gain, wherein the analog to digital converter is operable sample and integrate the third base-emitter voltage while applying a third gain, wherein the analog to digital converter is operable sample and integrate the fourth base-emitter voltage while applying a fourth gain, and wherein the analog to digital converter is operable to provide an integrated output combining the first base-emitter voltage, the second base emitter voltage, the third base emitter voltage and the fourth base emitter voltage.

A method for performing temperature measurements, the method comprising:

• providing a transistor;
• exciting the transistor with at least four sequential input signals of different magnitudes, wherein the transistor exhibits a sequence of output signals corresponding to the four sequential input signals;
• sensing the sequence of output signals using a different gain for each of the output signals included in the sequence of output signals;
• combining the sequence of output signals to produce a combined output, wherein combining the sequence of output signals eliminates a resistance error.