[sdiy] LTSpice macromodell help

[Tim Stinchcombe]

As well as tanh already suggested, I think the 'arctan' expression used in
this nice little article does the job tolerably well too:

<http://www.edn.com/article/493732-Modular_macromodeling_techniques_for_Spic
e_simulators.php>

PDF version:

http://www.edn.com/contents/images/198891.pdf

Tim
__________________________________________________________
Tim Stinchcombe 

Cheltenham, Glos, UK
email: tim102 at tstinchcombe.freeserve.co.uk
www.timstinchcombe.co.uk


> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl 
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of 
> Harry Bissell
> Sent: 13 April 2011 16:48
> To: synthdiy
> Subject: [sdiy] LTSpice macromodell help
> 
> 
> 
> Hi all... yes its synth-related
> 
> I'm trying to come up with a macromodel of a voltage limiter 
> circuit. Electronic Workbench includes such a device, LTspice 
> does not.
> 
> The object would be to limit input voltages to a range 
> between Vpos and Vneg that I would set. Using a series 
> resistor, two diodes, and two voltage sources is a crude way 
> to do it. I'm looking for something much more elegant.
> 
> Any takers ???
> 
> H^) harry
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