eldo_user

Post-Processing Library
EZwave Waveform Calculator Functions Usage
EZwave Waveform Calculator Functions Usage
The EZwave Waveform Calculator library can be used from Eldo through Tcl scripts. The wfc
function enables full access to all the calculation operations of the EZwave Waveform
Calculator.
Tip
See “Waveform Calculator” and the “wfc command” in the EZwave User’s and Reference
Manual.
Syntax
wfc expression
Arguments
• expression
Waveform Calculator expression.
Examples
This example shows how to pass parameters from the Eldo Tcl procedure to an EZwave wfc
expression.
* Passing Tcl proc parameters to a wfc expression
r1 net50 0 1
v1 net50 0 am(1 1 100meg 1G)
.tran 20n 20n
.option eps=1e-8
.probe tran all
.extract tran label=initial_rise tcross(v(net50), vth=1.25, occur=1)
.use_tcl eldo_syntax_ko.tcl mode=ezwave
.call_tcl tran where=end_of_run
+ ezwave_p2p_ex(v(net50), meas(initial_rise))
.end
proc ezwave_p2p_ex {wave xstart} {
set pk_to_pk \
[wfc "peaktopeak($wave, x_start=$xstart, x_end=\"20e-9\")"]
puts "The proc computed value is... $pk_to_pk"
}
The expression passed to wfc needs to be enclosed in double quotes if it contains Tcl variables,
otherwise parentheses { } can be used. If arguments of wfc functions are strings, they need to be
enclosed in single quotes (‘) or escaped double quotes (\”).
Related Topics
General Usage
Eldo® User's Manual, 15.3 1149