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Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexxim Component Models >
Independent Sources >
Current Source, AM (Netlist Only)

Current Source, AM (Netlist Only)

AM Current Source Netlist Format

The format to include an amplitude-modulated, time-varying (AM) current source is:

Ixxxx n+ n- AM (sa oc fm fc [td])

n+ is the positive node and n- is the negative node of the current source. Parameters in parentheses are positional. The first four parameters must be present in the order given.

Note

The AM current source is available for use in netlists, but is not supported in the Components window of the Designer Schematic Editor.

**AM Current Source Parameters**
Parameter	Description	Unit	Default
fc	Carrier frequency	Hertz	0.0
fm	Modulation frequency	Hertz	1/TSTOP
oc	Offset constant applied to the modulation amplitude	None	0.0
sa	Signal amplitude	Amp	0.0
td	Propagation delay before the start of the signal	Second	0.0

AM Current Source Netlist Example

* AM Current Source netlist example
* To visualize the interaction of sa (signal amplitude)
* and oc (offset constant)
* swap the next two lines by moving the comment mark (*),
* analyze, create reports

* I1 1 0 AM (80 0 5e6 1e9 0)

I1 1 0 AM (20 4 5e6 1e9 0)

R1 1 0 1

.TRAN 1e-10 1e-6

.PRINT tran V(1)

.END

Notes

1. The AM current source output is calculated as follows:

output = sa ´ {oc + sin[2p ´ fm ´ (time - td)]} ´ sin[2p ´ fc ´ (time - td)]

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