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Working with S, Y, Z Parameters<br />

Instantiating a Block Defined by S, Y, Z Parameters<br />

.model dio D rs=4.68 bv=6.1 cjo=246p<br />

.model Fblock macro lang=c<br />

vin 1 0 dc 5 ac 1 pulse(0 5 1n 1n 1n 5n 10n)<br />

rin 1 2 50<br />

ytline Fblock param:<br />

+ force_passivity=1<br />

+ string: C:\s-parameterdata\lowpassfilter.s2p<br />

+ pin: 2 0 3 0<br />

dout 3 0 dio<br />

.ac dec 10 1 10meg<br />

.tran 10n 100n<br />

.plot ac vdb(2) vdb(3)<br />

.plot tran v(1) v(2) v(3)<br />

.end<br />

In this example, a block y2port refers to an S parameter file sb4.par (defined with idx_f=4).<br />

Here, the S-block is described as a subcircuit. The DSP method is chosen and delay extraction is<br />

prevented.<br />

.subckt sparam_2p p1 p2 grnd<br />

.model Fblock macro lang=c<br />

y2port FBLOCK param:<br />

+ idx_f=4<br />

+ idx_m=1<br />

+ no_delay=1<br />

+ pin: p1 grnd p2 grnd<br />

.ends sparam_2p<br />

Related Topics<br />

Touchstone Data File Format<br />

CITIfile Data File Format<br />

704<br />

Eldo® User's Manual, 15.3

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