The circuit, as defined in the original netlist, will cause the simulator complaint, reading something like ' nodes 2 and 5 are floating', since these nodes have no DC path to ground due to C1 and Cs. TRAN 0.1ns 100us 0 25ns for my transient analysis, its result is presented below.
IMHO the transient analysis should be carried out. AC DEC 10 10 5MEG statement (AC Sweep) in the original netlist, since there is no AC source within the circuit.
To initiate the crystal (high Q) oscillations, it is helpful, according to my experience, to ' inject some small current' by setting up the 'crystal inductor' non-zero initial condition (IC=100pA in my example, see below else start of oscillations takes a long time, if it ever starts). milli (the netlist is case insensitive), so the value of R1 is 10 m\$ \Omega \$ instead of the intended 10 M\$ \Omega \$! The 'Mega' prefix of a physical unit is determined by MEG suffix in the Spice value syntax (or meg, Meg, etc.). In Spice simulators both suffixes ' M' and ' m' mean the same - i.e. I haven't checked the behaviour of the OrCAD Capture editor in an analogical case.įurther, I have a few, in my opinion quite important, notes concerning the circuit simulation: I admit the described procedure isn't very comfortable. MODEL item is manually inserted into the netlist again, saved and the simulation run then, it works well (no change may be made within Schematics editor). If any change is made in the circuit within the Schematics editor, then the subsequent simulation run leads to the same error message ( undefined model because of the netlist having been freshly overwritten -> the model placed there deleted), but if after that the. I myself use the editor Schematics (Microsim's) instead of the OrCAD Capture editor to capture schematics. MODEL item inserted in it manually will be lost then). In fact, it is also possible to use " your" way (Millares'), but it is quite complicated since the schematic editor normally overwrites the netlist (so the. Spehro Pefhany is right that you should place the model into a file (a library file or a file that will be included).
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