Trimming Circuits for Nonlinear Temperature Drift Compensation

The temperature drift compensation is segmented into two independent components: linear temperature dependence and nonlinear temperature dependence. The linear component is eliminated by trimming the temperature-dependent variable to zero at a first temperature, while the nonlinear component is compensated by trimming at multiple temperatures (first, second, and third temperatures). This segmentation allows each component to be addressed with appropriate trimming strategies, resolving the contradiction between eliminating linear drift and compensating for nonlinear fluctuations.

The trimming process performs preliminary actions at multiple temperatures before final operation. First, the temperature-dependent variable is trimmed to zero at a first temperature (e.g., 100°C). Then, additional trimming is performed at a second temperature (e.g., 20°C) and a third temperature (between the first and second temperatures) to compensate for nonlinear effects. These preliminary trimming actions at different temperatures prepare the system to maintain stability across the full operating temperature range, resolving the contradiction between process simplicity and parameter stability.

The trimming process extends from a single temperature point into the temperature dimension by performing trimming at multiple temperatures (first, second, and third temperatures). This dimensional expansion allows the system to capture and compensate for nonlinear temperature dependencies that cannot be addressed at a single temperature point. The additional temperature dimension provides the necessary information to calculate and apply nonlinear compensation, resolving the contradiction between accuracy improvement and process complexity by systematically utilizing temperature as an additional degree of freedom.