Thermal compensation circuits

Theoretically, thermal effects act in the same way on all four branches of the bridge, and therefore cancel each other out to a first approximation, but when we want to achieve a certain degree of precision (e.g. 0.005% / °C), we need to discuss this theoretical evidence.

Among the causes of thermal pests are :

• voltage-generating thermoelectric effects ;

• zero drift;

• variations in sensitivity.

Let's consider these phenomena in turn.