eldo_user

Netlist Explanation
Examples
Example 1—AC Analysis of a Parallel LCR Circuit
The first line is the circuit title. It must always be the first line of a simulation.
LCR Parallel Network
The first part of the Eldo netlist is a description of the circuit components.
The line below defines an AC voltage source vin connected between the nodes 1 and 0 of value
1V and 0º phase.
vin 1 0 ac 1 0
The lines below define the devices present in the circuit to be simulated. Each device
instantiation gives the component name, the nodes to which the component is connected and the
value of the component.
r2 1 2 50
r3 2 3 50k
r5 3 0 50
l1 2 3 100u
c4 2 3 10n
The next part of the netlist specifies the simulation control directives indicating the type of
simulation Eldo will perform on the circuit.
The line below indicates that Eldo will perform an AC analysis on the circuit within the
frequency range 100Hz to 1 GHz with 1000 steps per decade.
.ac dec 1000 100 1g
The line below specifies a dB/frequency plot of the nodes 2 and 3 on the same graph.
.plot ac vdb(2) vdb(3)
The netlist is terminated with the command below. This is not mandatory, but recommended.
.end
Simulation Results
The results are stored in the ac_basic.wdb file and can be displayed using the EZwave graphical
results post-processor. Figure 21-2 shows the results using the EZwave waveform viewer.
Eldo® User's Manual, 15.3 1273