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Documentation update (ac and u2)

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pnenzi 2000-05-23 19:53:35 +00:00
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commit be5cf2643c
2 changed files with 9 additions and 6 deletions
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doc/ChangeLog
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@ -1,7 +1,7 @@
2000-05-21 Paolo Nenzi <p.nenzi@ieee.org>
2000-05-22 Paolo Nenzi <p.nenzi@ieee.org>
* ngspice.texi: Added text for u2 function and for resistance ac
paramter.
* ngspice.texi: documentation update. AC parameter for resistor
added.
1999-09-06 Arno Peters <A.W.Peters@ieee.org>
* ngspice.texi: Added TeX equivalents for some formula.

9
doc/ngspice.texi
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@ -1803,10 +1803,13 @@ The function "u" is the unit step function, with a value of one for
arguments greater than one and a value of zero for arguments less than
zero. The function "uramp" is the integral of the unit step: for an
input x, the value is zero if x is less than zero, or if x is greater
than zero the value is x. These two functions are useful in sythesizing
piece-wise non-linear functions, though convergence may be adversely
affected.
than zero the value is x. The function "u2" returns a value of zero for
arguments less than zero, one for arguments greater than one and assumes
the value of the argument between these limits .These three functions are
useful in sythesizing piece-wise non-linear functions, though convergence
may be adversely affected.
Note: "u2" function has been introduced in rework-11.
The following standard operators are defined: