Other IC-CAP Features

Parameter Extraction and PEL

One of the powers of IC-CAP lies in its open architecture and its Parameter Extraction Language (PEL). PEL is an IC-CAP language that is quite similar to the HP BASIC. PEL allows users to write Transforms and Macros.

Transforms are programs that works with data, and Macros are for automation. Model parameters are extracted by applying mathematical transforms to measured data. Simple extractions can be created by writing an equation directly in the IC-CAP transform window.

More intricate transforms can be created by using PEL.. PEL allows you to interactively develop new extraction routines that can be immediately tested on actual data.

Function Library

The Function Library provides convenient access to routines for trigonometric, complex, statistical, two-port, and matrix computations. For example, the Two-Port function can be used to convert between two-port data types such as S-parameters to Y-parameters.

The Function Library can also be augmented with user-defined functions. These can be written in the C language and linked into IC-CAP. PEL, the Function Library, and the user-defined functions give you the power to develop exactly the device and circuit models you need.

Example of a VBIC built-in function.

Parameter Optimization

After comparing simulated data to measured data, model parameters can be adjusted (optimized) in an iterative manner so that the simulated data more closely matches the measured data.

IC-CAP includes several optimization algorithms. A large number of parameters can be optimized to a large number of weighted data sets. You control optimization settings such as the minimum and maximum parameter values, upper and lower data boundaries, and maximum error limits.

The Sensitivity Analysis Mode shows you which parameters have the greatest effect on a particular optimization. This exposes the dominant parameters that should be accurately extracted before optimizing other interrelated parameters.

IC-CAP also includes a Tuner that allows you to optimize your data in real time. A tuning macro can be written to adjust the values of parameters, allowing you to see the effect on the simulated data instantaneously.

A slider or scale widget appears on the screen along with the plot. The slider is adjusted with the mouse cursor, and the resulting simulated data corresponding to the adjusted parameters is plotted automatically.

Manually tuning parameter for real-time fitting

Plot Optimizer

Simultaneously optimizing a large number of parameters are made easy with the new Plot Optimizer. From every IC-CAP plots, you can quickly open the Plot Optimizer, configure and perform your optimizations with a few mouse clicks.

Click on the following link for more information:

• Plot Optimizer

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