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LTspice - how to simulate real TTL gates?

I am trying to make simpler more general questions that might have more generally useful answers. If you build a mixed analog digital circuit then you need to have models of real TTL or CMOS gates ...
Gunther Schadow's user avatar
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LTspice and TTL logic gate parameters, my edge triggered ramp generator is current starved? How to correctly estimate TTL gate impedances?

Continuing with my edge triggered ramp generator and its simulation, thanks to all your help I have the LTspice simulation set up that I can see a theoretical circuit work that uses the rising edge of ...
Gunther Schadow's user avatar
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1 answer
5k views

Can't type on Virtual Terminal Proteus

I've connected my SIM900a module with PC via a USB to TTL converter. I'm using Proteus Virtual Terminal for check the AT commands. The problem is I can't type anything on the Virtual Terminal. Copy ...
opu 웃's user avatar
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