To learn how to write your own UDMs, we'd recommend starting with the tutorial linked below. It provides a step-by-step guide on how to write each part of the UDM with exercise examples.

• Lecture notes: MODELZEN_UDM_201907.pdf
• Exercise package: modelzen_udm_201907.tar.gz

When you write UDMs, you may find it necessary to use the XMULAN and MODELFIT Python libraries provided in the XMODEL package. They can run SPICE simulations from a Python script and extract model parameters from the simulated results. To learn about these Python libraries, we'd recommend reading the following chapters included in the MODELZEN tutorial. The lecture notes and exercise package can be found within the XMODEL installation directory: $XMODEL_HOME/tutorial/modelzen_basic.

• Lecture notes: Lecture #06: Automating simulations with XMULAN and Python
• Lecture notes: Lecture #07: Model calibration using MODELFIT

For your information, the XMODEL package includes many UDMs that you can use as-is to extract models from your circuits. The tutorial linked below describe each of the UDMs along with the circuit examples for you try applying the UDMs to.

• Lecture notes: MODELZEN_UDM_Guide_202009.pdf
• Exercise package: modelzen_udm_202009.tar.gz

To learn how to write your own UDMs, we'd recommend starting with the tutorial linked below. It provides a step-by-step guide on how to write each part of the UDM with exercise examples.

• Lecture notes: MODELZEN_UDM_201907.pdf
• Exercise package: modelzen_udm_201907.tar.gz

When you write UDMs, you may find it necessary to use the XMULAN and MODELFIT Python libraries provided in the XMODEL package. They can run SPICE simulations from a Python script and extract model parameters from the simulated results. To learn about these Python libraries, we'd recommend reading the following chapters included in the MODELZEN tutorial. The lecture notes and exercise package can be found within the XMODEL installation directory: $XMODEL_HOME/tutorial/modelzen_basic.

• Lecture notes: Lecture #06: Automating simulations with XMULAN and Python
• Lecture notes: Lecture #07: Model calibration using MODELFIT

For your information, the XMODEL package includes many UDMs that you can use as-is to extract models from your circuits. The tutorial linked below describe each of the UDMs along with the circuit examples for you try applying the UDMs to.

• Lecture notes: MODELZEN_UDM_Guide_202009.pdf
• Exercise package: modelzen_udm_202009.tar.gz