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Ansoft Designer / Ansys Designer 在线帮助文档：

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   Current Source, Single-Frequency FM (Netlist Only)       

Current Source, Single-Frequency FM (Netlist Only)

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Single-Frequency FM Current Source Netlist Format

The format for a single-frequency-modulated current source is:

Ixxxx n+ n- SFFM ( vo va [fc [mdi [fs] ] ] )

n+ and n- are the positive and negative nodes, as for the DC current source. The unlabeled parameters in parentheses are positional. Parameters vo and va are required. Parameters fc, mdi, and fs can be omitted, but the parameters must be entered in the order shown. To guarantee that a given parameter is interpreted correctly, all parameters to the left of it must be present.

 

Note 

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

 


SFFM Current Source Parameters

Entry

Description

Unit

Default

vo

Output current offset from zero Amps

Amp

0.0

va

RMS output current amplitude

Amp

0.0

fc

Carrier frequency

Hertz

1/TSTOP entry from the .TRAN statement

mdi

Modulation index

Second

0.0

fs

Source frequency

Hertz

1/TSTOP entry from the .TRAN statement

SFFM Current Source Equation

The shape of the SFFM current waveform is given by the equation:

output = vo + va ´ sin[(2p ´ fc ´ time) + mdi ´ sin(2p ´ fs ´ time)]

SFFM Current Source Netlist Example

I1 15 21 SFFM (0 1e-6 20K 5 1K)

 



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