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Simulator Compatibility<br />

Sources in Compat Mode<br />

Node GROUND/GND/GND!<br />

Node GROUND, GND and GND! are assumed to be the global node 0.<br />

Value “x”<br />

“x” is equivalent to “meg”, that is, in compat mode:<br />

R1 1 0 1x<br />

is equivalent to:<br />

R1 1 0 1meg<br />

Otherwise, 1x corresponds to 1.0.<br />

S Parameter (SP) Model<br />

In compat mode, a subset of the small-signal parameter data frequency table model (SP model)<br />

is supported. The options and parameters supported are: S param data directly written in netlist,<br />

FBASE, FMAX, TYPE=Y, VALTYPE, DATA. The VALTYPE parameter is optional; if not<br />

specified, the default value is cartesian. Resistance is 50 Ω by default.<br />

See “Lossy Transmission Line W Sampled Matrix Model” in the Eldo Reference Manual.<br />

Related Topics<br />

HSPICE Compatibility<br />

Sources in Compat Mode<br />

The LFSR source syntax is different in compat mode:<br />

LFSR [(] vlow vhigh tdelay trise tfall rate seed<br />

+ [taps] [rout=val] [ENCODE=DW8b10b] [RD_INIT=1|2] [)]<br />

Related Topics<br />

HSPICE Compatibility<br />

Commands in Compat Mode<br />

Some commands have different behavior in HSPICE compatibility mode.<br />

• .ALTER<br />

This command is cumulative. For example:<br />

168<br />

Eldo® User's Manual, 15.3

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