Hello. Thank you for clicking on my article.

I'm from Korea and a college student.

I'd like to find a solution.

My circuit simulation speed is too slow. So I want to speed up.

I saw what other people did at Google and made it.

I want to speed up the simulation.

I'd appreciate your help.

 

Welcome to AAC!
LTS apparently doesn't like your dual-polarity floating voltage source V2. Try replacing it with respective separate ground-referenced sources for Vcc and Vee.