Multi-Technology Simulation Mode (mts)

Description

Multi-Technology Simulation (MTS) mode enables the simulation of a system consisting of blocks designed with different processes. Under this mode, models and modelgroups referenced using include or ahdl_include statements in a subcircuit are locally scoped to that subcircuit only. In addition, selected process options parameters (temp, tnom, scale, scalem, reltol, cmin, and postlpreset), when specified in a subcircuit, are locally scoped to that subcircuit only.

MTS mode is enabled by default across all Spectre simulators. To turn the MTS mode off, use the -mts command-line option.

Here is an example of a system consisting of blocks designed with different processes:

subckt chip1 ( in out )

 scopedOptions options tnom=27 scale=0.1

 .......

ends chip1

subckt chip2 ( in out )

 scopedOptions options tnom=25 scale=0.2

 ......

ends chip2

In the log file, you will see the following user options:

Scoped user options:

 tnom = 27    subckt=chip1

 scale = 0.1   subckt=chip1

 tnom = 25   subckt=chip2

 scale = 0.2   subckt=chip2m

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