eldo_user

Eldo Control Language
Testbench Definition
Note
The Eldo Control Language is case-sensitive.
Examples
Here is an example of a simple testbench:
.define_testbench tran_options
.option eps=1e-8 hmax=10p reltol=1e-7 gear
.end_define_testbench
This testbench definition creates a user-defined simulator command named .tran_options that
can be used (instantiated) in the base netlist. This testbench has no parameters; instantiating it in
the base netlist or in a simulation run from a task would be equivalent to using the following in
the netlist:
.option eps=1e-8 hmax=10p reltol=1e-7 gear
Note
It is forbidden to use the names of existing simulator commands (such as .ALTER, .STEP,
and so on) as testbench names. Note also that a testbench definition can be added anywhere
in the base netlist, or in files included by the base netlist.
Here is another example of a testbench:
.define_testbench measure_tprop
+ (cload_val=1p, trise=10n, signal="out")
.tran 0 10n
cload signal gnd cload_val
VD D gnd PULSE 0V 1.8V 0n trise trise 50n 100n
.extract tran label=tp xup(V(signal),1.8/2)-xup(V(D),1.8/2)
.extract tran label=avgivdd average(i(vdd))
.end_define_testbench
This example shows a (partially) parameterized testbench. The load capacitance on the
specified node and the rise time of the input signal are parameterized, and may be defined at
instantiation time. The measured propagation time (tp) and the average current consumption
(avgivdd) are .EXTRACT results; their computed values can be returned to the calling task (in
the case that this testbench was instantiated in a simulation run from a task; see “Defining and
Running Simulations” on page 841).
Note
All parameters have a default value, which is mandatory.
810
Eldo® User's Manual, 15.3