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From: al davis
Subject: Re: Spice Modeling
Date: Tue, 21 Jan 2003 12:04:14 -0700
> In article , "Jason"
>> I don't know if these are the right newsgroups for this, but here it goes
>> anyway. How would you describe/model a rapid single flux quantum based
>> superconductor logic that uses Josephson Junctions using spice? I'm new
>> to spice and would like to learn how to model RSFQ circuits in spice. Any
>> help would be appreciated.
Charles DH Williams wrote:
> There are two approaches deopending on how serious you are.
> (i) build up a subcircuit containing an equivalent circuit using the
> standard entities like resistors capacitors mutual inductors and use
> behavioural sources to model the Josephson equations for the junctions
> (ii) implement a true spice model (in C) and compile your own verision
You left out one ....
(iii) Use a simulator that has a model compiler.
> (i) is relatively trivial (a couple of hours work) (ii) is relatively hard
> (several weeks, possibly months, work)
(iii) gives you the performance and flexibility of (ii) with effort
comparable to (i) .
Actually, I think you are underestimating the effort for both, especially
for someone who is new to Spice.
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