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Those 0 and N003 node names could be IN- and IN+, but I don't think that matters - they just transfer the connections

@John Woodgate John does your OpAmp.sub look like this? .SUBCKT OpAmp 0 N003 V+ V- OUT X1 0 N003 V+ V- OUT level1 Avol=1Meg GBW=10Meg Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg .lib UniversalOpAmp1.lib

It won't run. ERROR: C:\Users\User\Downloads\Pease MFB BP filter (2)\Pease MFB BP filter (2)\OpAmp.sub(7): This sub-circuit name is not defined. X1 3 2 8 4 1 UniversalOpAmp ???????????

It's 'Solder pads for test leads'. It buzzes if R10 is low enough, so it's a continuity tester. I suppose the PTC in the picture is protection against the test leads being connected to a significant

Add "startup" to the .TRAN directive. -- Regards, Tony

The circuit does require quite a high GBW. With the 4562, it begins to lose gain above 50 kHz peak frequency. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

I don't know what a testofon (or testafon) is, but I think it is a buzzer?? Does it make an audible buzzing sound when the leads connect? From the looks of the schematic, it seems like there should

Hi, I try to simulate a testofon, but it doesn't work. Has anyone an idea, why? /g/LTspice/files/Temp/Testofon.zip -- Klaus

I forgot to mention - I also uploaded "Pease MFB BP filter with UnivOpAmp2.zip" to the Temp folder.? It substitutes the UniversalOpAmp2 in place of the LM4562, and it moves the "OUT" node to the

That actually does work too, except for these two things: * You must remember to also add a ".lib" command to the schematic to load the necessary library file. * The actual subcircuit names of the

That's what I have now done, but I had strange difficulty in getting rid of the .ASC with the wrong OUT flag.

I agree, a fixed schematic is best.? It would be even better if John had moved the "OUT" node name to the right place.? Oh well. But it really was trivial to delete the ".inc" command and the op-amp

I've updated to include the 4562 model file. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

I was suggesting that,as in this case a device include is missing (happens often), if I could comment out the ".inc LM4562_NS.sub", and supposing I had many opamps that use that model, It would be

Well, you would have already known that it was not possible to simply do that because you already had to point to the LM4562_NS.sub (or whatever) model file. The universalopamp is no different to any

Hi John,? I was really only intereseted in advising that your Pease zip was missing the LM4562_NS.sub ifile needed for simulation of the actual circuit you posted. The UniversalOpAmp thing was just

I made a ZIP with UniversalOpamp, but Tony seems to have made it superfluous.? I will upload it, if it still has value. -- This email has been checked for viruses by AVG antivirus software.

LOL! Not the same as 'simply change the name'.? T

Actually, you can already do exactly that. 1. Place opamp2 symbol (if not already present) 2. Change the Value to level2 3. Add: .lib universalopamp2.lib as a SPICE directive You're done! Of course,

Hi John, Could you update your zip of the circuit to .inc LM4562_NS.sub?Btw, it occurs to me because of this that a nice feature for LTspice would be to be able to simply change the opamp name on the