eldo_user

Optimization
Fourband Filter Optimization
.PARAM
+ R2=10K CL=0.01U R2B=8K
+ CTB=0.01U CLB=0.01U R2C=12K CTC=0.002U
+ R2D=12K CTD=800P CLD=150P
+ CACT1=0.02U CACT2=0.02U
+ RPASS=4K RACT1=50K RACT2=180K
.PARAM CT=0.02U CLC=0.001U CPASS=0.3U
with the associated .PARAMOPT statements:
.PARAMOPT
+ R2 = ( 5K, 20K)
+ CT = (0.001U, 0.05U)
+ CL = (0.001U, 0.05U)
+ R2B = ( 3K, 10K)
+ CTB = (0.001U, 0.05U)
+ CLB = (0.001U, 0.05U)
+ R2C = ( 5K, 20K)
+ CTC = (0.001U, 0.01U)
+ CLC = (0.001U, 0.005U)
+ R2D = ( 5K, 20K)
+ CTD = ( 100P, 1000P)
+ CLD = ( 10P, 500P)
+ CPASS = ( 0.1U, 1.0U)
+ CACT1 = (0.001U, 0.05U)
+ CACT2 = (0.001U, 0.05U)
+ RPASS = ( 1K, 5K)
+ RACT1 = ( 20K, 100K)
.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.
Design Objectives
The optimization will be performed on a single design objective which aims to improve the
match of the constructed model (or the target curve) with the actual measurements. The
differences between the model and the measured values are combined in a global error function
(using the least squares approach).
The objective statement is:
.OBJECTIVE AC LABEL=RESPVDB12
+ VDB(12) GOAL=DATA_FOURBAND(VDB12)
Former releases of the Eldo optimizer used the equivalent (but less explicit) FITTING
construct:
.EXTRACT AC LABEL=RESPVDB12 FITTING
+ DATA_FOURBAND(VDB12) VDB(12)
Eldo® User's Manual, 15.3 673