topic Re: Logic gates spice simulation in EAGLE Forum

Logic gates spice simulation

marcusrmo — Fri, 21 Apr 2023 15:13:08 GMT

Hello, I'm recently starting to learn Eagle as one of my assignments and I'm having issues simulating a simple AND gate.

I've tried emulating the examples in the spice digital folder but the circuits I try to simulate take over the 5 mins to run and was looking for a point in the right direction. This is the circuit I have right now.

Help would be greatly appreciated.

Re: Logic gates spice simulation

bidrohini — Tue, 30 May 2023 11:57:30 GMT

Here is a thread about a similar problem. You can check this out: https://forums.autodesk.com/t5/eagle-forum/simulation-never-finishing/td-p/10616774

Re: Logic gates spice simulation

jorge_garcia — Tue, 30 May 2023 20:45:12 GMT

Hi @marcusrmo,

I hope you're doing well. Couple of things to check, 1) How long do you have the simulation running for? Best practice is to setup your start and stop times in transient sims to get 4 or 5 cycles of the waveform. If you are waiting for 100s of cycles to simulate that might explain the problem. 2) Instead of using an analog source just to get a series of ones, you could just use another digital source and avoid that initial analog to digital conversion.

Let me know if any of these apply in your case. If they don't then we can continue to investigate further.

Best Regards,