eldo_user

Optimization
Design Objectives for Multi-Point Simulation
Specifying Design Objectives with Explicit Data Points
This topic describes how to specify design objectives when simulation points are explicitly
specified. It first considers data-driven AC and transient analyses, and then parameter- and listdriven
AC analysis, and transient analysis in HSPICE compatibility mode.
Data-Driven Analysis
Consider data-driven AC and transient analyses where the command matches one of the
following:
.AC DATA=data_name [SWEEP DATA=data_name]
.AC DATA=data_name [SWEEP param_name TYPE nb start stop]
.AC DATA=data_name [SWEEP param_name start stop incr]
.TRAN DATA=data_name [SWEEP DATA=data_name]
.TRAN DATA=data_name [SWEEP param_name TYPE nb start stop]
.TRAN DATA=data_name [SWEEP param_name start stop incr]
In these cases, a GOAL or EQUAL objective statement has the following syntax:
. DATA=OMEGA_DATA(OMEGA)
.DATA OMEGA_DATA
+ OMEGA GOAL_VAL WEIGHT_VAL TYP_VAL
+ OMEGA1 GOAL_VAL1 WEIGHT_VAL1 TYP_VAL1
*... ... ... ...
+ OMEGAP GOAL_VALP WEIGHT_VALP TYP_VALP
.ENDDATA
.OBJECTIVE
+ EXTRACT_INFO [LABEL=NAME]
+ {$MACRO|FUNCTION}
+ OBJECTIVE_INFO
+ [SCALE_INFO]
where the parameter OMEGA is the keyword TIME or FREQ, and:
and:
OBJECTIVE_INFO:=
{GOAL=OMEGA_DATA(GOAL_VAL)|RVALUE} | {EQUAL=OMEGA_DATA(GOAL_VAL)|RVALUE}
[ WEIGHT=OMEGA_DATA(WEIGHT)|RVALUE]
SCALE_INFO:=
TYPVAL=OMEGA_DATA(TYP_VAL) | RVALUE
Using the same .DATA statement in the analysis and the objective statement ensures data
coherency. A scalar value (denoted by RVALUE) can be specified for the GOAL, EQUAL,
WEIGHT and TYPVAL parameters.
Eldo® User's Manual, 15.3 619