SIMPLORER User Manual V6.0 - FER-a

13
404 Simulator
Solver Parameters
ITERATMAX (50) Maximum number of iterations.
EMAXDC (1m) Maximum error [A].
RELAXMAX (10) Maximum number of relaxations.
13.2 VHDL-AMS Simulation
The VHDL-AMS simulator is a sub-simulator of the SIMPLORER system. It calculates simulation
models described in VHDL-AMS (Very high speed integrated circuit Hardware Description
Language - Analog Mixed Signal). The SML compiler starts the VHDL-AMS simulator if
VHDL-AMS models are used in the simulation model.
Components for VHDL-AMS Simulation
• Components in the «AMS» tab.
• Components in the «Digital» tab.
• Components with implementation of VHDL-AMS description.
If a macro models has both, SML and VHDL-AMS description, you can define the used modelling
language in the component dialog. Double-click the component and click the «Library»
tab. Open the drop-down list «Select modelling language» and select either SML or VHDL-
AMS. If VHDL-AMS is selected, you can also choose an architecture in the drop-down list «Select
Architecture/Modelling Level». See also “Creating a Model from Existing .vhd File” on
page 490 and “Creating Models in VHDL-AMS in the Model Agent” on page 492. See also
VHDL-AMS model description in the SMPLORER online help.
Parameters of VHDL-AMS Simulator
In the Schematic, choose SIMULATION>PARAMETER and click the «TR» tab to set the parameters
for the VHDL-AMS simulator. See also 13.6 “Simulator Backplane” on page 418.
General Simulation Parameters
THETA (23) Global ambient temperature for temperature dependent components
[°C].
TEND (40m) Simulation end time in seconds.
HMIN (10µ) Minimum time step in seconds.
HMAX (1m) Maximum time step in seconds.
Circuit Simulator Parameters
SECM.SOLVER Used integration method. 0=Euler, 1=Trapez
Trapez
Used for oscillating LC systems or analog oscillators, especially useful
for investigating energy problems .
Euler Integration
Used for all other simulation problems. Damping effects may cause
false results for energy relationships.