eldo_user

Optimization
Eldo Optimization Methods
• .OPTION OPSELDO_OUTER specifies a reverse behavior of optimization and sweep
simulations.
• .OPTION OPSELDO_OUTPUT specifies the format for optimization results using the
Dichotomy, Secant, and Passfail methods.
• .OPTION PARAMOPT_NOINITIAL enables the .PARAMOPT command to be
specified without an initial value, which is instead taken from the netlist. For example, if
the capacitors CT, CLC and CPASS are specified in the netlist:
.PARAM CT=0.02U CLC=0.001U CPASS=0.3U
with the associated .PARAMOPT statement:
.PARAMOPT
+ CT = (0.001U, 0.05U)
+ CLC = (0.001U, 0.005U)
+ CPASS = ( 0.1U, 1.0U)
.OPTION PARAMOPT_NOINITIAL
The option PARAMOPT_NOINITIAL specifies that the parameter INITIAL_VALUE
is omitted from the .PARAMOPT command and should be taken from the netlist
instead.
Related Topics
Optimization Commands
Eldo Optimization Methods
Design Variables
Design Objectives
Inner and Outer Sweep Parameters
Eldo Optimization Methods
Sometimes you need to be more precise about the underlying method or algorithm used during
the optimization.
The terminology in Table 13-1 enables you to specify the underlying method or algorithm.
Table 13-1. Eldo Optimization Methods
Name Algorithm/Method Terminology
Eldo optimizer/SQP SQP method .OPTIMIZE
Eldo optimizer/Search Dichotomy and inverse
quadratic interpolation
.OPTIMIZE METHOD=SEARCH
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Eldo® User's Manual, 15.3