Hi,
I have a query wrt the probing currents in cadence.
To probe the current i click on the pin (device or Instance symbol) , which shows a circle around it. The problem that i am facing is that this works perfectly when my simulator is Spectre.
But when my simulator is hspice probing a device pin gives a warning :
Element xpm1 in print, plot, probe or measure statements is invalid. Output is ignored.
And the currents are not plotted.
I am trying to probe the drain currents of PMOS in a simple current mirror circuit.
When i check the netlist created for hspice, there exists a definition for xpm1 and the probe statement for it is I1(xpm1). For the same simulation i am able to plot the transient node voltages as well current at the plus terminal of an ideal current source or a instance symbol pin.
Another difference that i noticed between the two input files (.scs and .ckt) is that:
In input.ckt (hspice) : the devices are defined as XPM or XNM instead of MPM or MNM
In input.scs (spectre) : the devices are defined as PM or NM.
The model files for both spectre and hspice contain the definition of mosfets as subckt..
Could anyone please suggest what could be the reason for this?