Virtuoso AMS Environment User Guide

6

Using External Text Designs

AMS Designer provides an efficient environment for developing and simulating designs. In addition, AMS Designer facilitates using existing and new designs developed outside of the

AMS environment. This chapter describes how you can use these external designs in the AMS environment.

This chapter contains the following sections:

■Overview of Steps for Using External Text Designs on page 180

■Bringing Modules into a Cadence Library on page 180

■Using Text Blocks in Schematics on page 184

■Using Modules Located in a Cadence Library on page 186

Note: There are a few differences between using HDL modules and design units standalone and using them in the AMS environment.

■To avoid problems reading and writing a file, always use a full path when opening files inside a module using $fopen. The AMS environment might use a run directory that is in a different location than what you expect.

■When you are using the AMS environment, editing HDL files directly might cause problems. For more information, see “Editing erilogV-AMS and VHDL-AMS Cellviews

Outside of the AMS Environment” on page 160.