Manuals >Nonlinear Device Models Volume 2 >Agilent Root Diode Model Generator
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Getting Started in IC-CAP

This example procedure assumes the following:

    • The system has been set up and switched on according to the instructions under:
     • Agilent 8510-based system—Configuring the System Hardware in Appendix B, "Using IC-CAP with an Agilent 85122A Precision Modeling System."
     • Agilent 8753-based system—Configuring the System Hardware in Appendix C, "Using IC-CAP with an Agilent 85123A Device Modeling System."
     • Wiltron 360-based system—Refer to your Wiltron documentation
    • The calibration standards have been removed from their containers to allow them to reach ambient room temperature.
    • The IC-CAP software has been properly installed on the computer.
    • IC-CAP has been configured to recognize the system hardware, and the SMUs have been renamed as follows, based on the instructions in the appropriate chapter:
     • Performing Hardware Setup in IC-CAP in Appendix B, "Using IC-CAP with an Agilent 85122A Precision Modeling System"
     • Performing Hardware Setup in IC-CAP in Appendix C, "Using IC-CAP with an Agilent 85123A Device Modeling System"
Rename the SMUs to correspond with the diode terminals

Rename a medium-power SMU such as MPSMU1 as VA (anode supply)

Rename a high-power SMU such as HPSMU3 as VC (cathode supply)

Refer to Appendix A, "Agilent 85190A IC-CAP" for instructions on opening the IC-CAP software and accessing the model file you need. The default pathname and filename for the Agilent Root diode model file you will use as a first starting point is:

/examples/model_files/diode/HPDiode.mdl

Then return to this chapter and continue with the procedure.

Note


Do not install the device yet. The procedure will instruct you to install it after extracting the measurement port resistances.

Before you continue with the IC-CAP procedure, make a new directory in an appropriate location in the UNIX structure, using the mkdir command, to store the data and model files that will be generated. Give the directory a name that will associate it with the device you are going to model. Use the cd command to change to the new directory in UNIX.

MNS Link

The model includes a link to the MNS microwave nonlinear simulator, to allow verification of the model in IC-CAP. The link is set up for MDS version B.07.00, and will need to be modified when MDS is updated. For the link to work, the path and environment variables need to be set correctly: this is done at the factory for the path and environment of a typical MDS B.07.00 system. Only minor changes to reflect unusual MDS paths or updated MDS versions are likely to be required. If you do need to modify your UNIX files to reset the MNS link, follow these steps to set the root MDS directory on your system and add $MDSROOT/mdsbin to the path:

For shell or kshell

  1   Add the following lines to .profile (or .vueprofile if you are using HP VUE) in your home directory to automatically set the environment variables:

MDSROOT=/mds_b.07.00 (depending on the version and location of MDS)
export MDSROOT
PATH=$MDSROOT/mdsbin: "$PATH"
export PATH

  2   Also add a line similar to the following to the usersimulators file in /usr/iccap/lib, so that IC-CAP recognizes the MNS simulator:

mns mns /mds_b.07.00/hp 85150/lib/mns800 "" CANNOT_PIPE

For cshell

  1   Add the following lines to .profile (or .vueprofile if you are using HP VUE) in your home directory:

#Setup for mns simulator:

setenv MDSROOT /mds_b.07.00
setenv PATH $MDSROOT/mdsbin: "$PATH"

  2   Add a line similar to the following to the usersimulators file in /usr/iccap/lib, so that IC-CAP recognizes the MNS simulator:

mns mns /mds_b.07.00/hp 85150/lib/mns800 "" CANNOT_PIPE

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