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From: Klaus Vestergaard Kragelund <klauskvik@hotmail.com>
Newsgroups: sci.electronics.design
Subject: Re: DDS, again
Date: Wed, 11 Dec 2024 14:07:45 +0100
Organization: A noiseless patient Spider
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On 11-12-2024 03:38, john larkin wrote:
> I have been unsuccessful in getting LT Spice to simulate a DDS
> frequency generator. It's bad enough trying to make the NCO part, but
> whenever I get close it stalls or throws convergence errors.
> 

I think you have the funds to buy Cadence Pspice. It has auto 
convergence build in. It's seldom I see problems with convergence after 
they added that feature.