开云体育

Very helpful. It would be good to add a .ZIP of all the files to the folder.

All LTspice users should be familiar with UniversalOpamps. There are 7 different UniversalOpAmp models of increasing complexity capable of modelling almost any proprietary opamp to reasonable levels of accuracy in most regards, typically with superior convergence and speed within LTspice.

I see quite a few people using opamps to model comparators, despite the requirements being quite different. It occurred to me this might be because there isn't an equivalent universal comparator. So I set out to change that.

The UniversalComp is the simplest solution I could think of with just one B-source, and it features:

• Programmable Propagation Delay (trapped to prevent values <0)
• Programmable Hysteresis (trapped to prevent values <0)
• Rail-to-Rail Output
• Excellent convergence
• Blistering speed
• Infinite Common-mode Input Range

I have also made two symbols, with the inputs reversed for drafting convenience, that are otherwise pin-wise compatible with the opamp2 and UniversalOpAmp symbols. The model and a test schematic is also available in Universal Comparator.

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Regards,
Tony