eldo_user

Simulator Compatibility
Arithmetic Functions and Operators in Compat Mode
Warning 1484: AC analysis will not be performed during transient
because of the commands ordering.
• .tran followed by .ac followed by another .tran
The first transient is performed, then AC + transient as in the first case
Related Topics
HSPICE Compatibility
Arithmetic Functions and Operators in Compat
Mode
Some arithmetic functions/operators have different behavior in HSPICE compatibility mode.
The following rules apply:
log(x) = sign(x) * log(abs(x))
log10(x) = sign(x) * log10(abs(x))
db(x) = sign(x) * 20.0*log10*abs(x))
sqrt(x) is -sqrt(abs(x)) if x is negative.
x**n is computed as x**n if x is positive, x**(INT(n)) if x is negative, and 0 if x is 0.
The power operator (^) has highest precedence (same as standard Eldo).
Note
In Eldo standard mode:
sqrt(x) returns an error if x is negative.
x**n is computed as exp(n*log(x)) if x is strictly positive, 0 otherwise.
EVAL Keyword
When the -compat argument is active, the function keyword EVAL is not required in
conditional expressions. For example:
r1 1 2 '(p1 > p2 ? p2: p1)'
Will be the equivalent of:
r1 1 2 'eval(p1 > p2 ? p2: p1)'
Related Topics
Arithmetic Functions
Eldo® User's Manual, 15.3 177