Re: TC1025 comparator spice model

From: Jim Thompson (thegreatone_at_example.com)
Date: 12/31/04 

Date: Fri, 31 Dec 2004 09:44:07 -0700

On Fri, 31 Dec 2004 06:24:41 GMT, "Mike Engelhardt" <nospam@spam.org>
wrote:

>Johan,
>
>> Hi Great One Jim,
>>
>> Looks fine. Now add power supply CURRENTS ;-)
>>
>> Thank you.
>> Could you show me how to do that please?
>
>You might just use the LTspice device "1pole".
>It's a behavioral opamp with a tanh() xfer
>function. Using the rail-to-rail opamp without
>feedback approximates a comparator. The 1pole
>does steer current from the supplies to the
>output. Also, the 1pole uses the tanh() xfer
>function that's part of an intrinsic SPICE
>device that knows how to help the solver find
>the solution with higher than just the 1st
>order information that's usually available to
>the solver's Newton iteration. The behavioral
>modeling like Jim's is using can't do that.
>
>--Mike
>

Tanh works just ducky in PSpice, or anywhere else for that matter...
it allows bounding without discontinuities.

                                        ...Jim Thompson 

-- 
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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