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Also, the parameter name in the top-level schematic should be "VDD", not "VDD1".? And the parameter "Speed1" on the top-level schematic should have been named "Speed", but it was set to the default

Your voltage source V2 drives node VDD1.? ?That? should be node VDD.? ?These CD4000 models require a power node named "VDD". Andy

OK, found the proper lib as well. Had to sort by date. We should get rid of the old stuff so that others do not download items in error. As for the circuit, I played some more but cannot get the

This precise error came up here recently.The fact that you got an error shows you must be running LTspice V24.1.x. This "error" has been in the library since the beginning, but previous versions of

Derek, Those errors depend on which version of LTspice you are using. On older versions, there are no errors in the Error Log file.? It simulates "correctly" and produces the right waveforms - though

Found it!!! It actually was an error in the .lib file. There are a few instances of "(vdd1" which should have a different bracket: "{vdd1". Now it runs. And this was from the recent download

At the end of the log file I get the following and cannot probe the circuit. I know it is a short run-time circuit. It is a portion of a larger one, and I have not played with the digital stuff

You uploaded the .LIB file twice, instead of the .LOG file, but there was no need anyway, we can run the sim to get the .LOG file. The sim runs OK (but does it do what you want? It seems to be a short

Andy, I updated the symbol from the suggested source. Deleted the old symbol and placed the new one. Restarted LTSpice. Still getting errors. I re-uploaded the CD_test.zip file. This time I included

You circuit is completely messed up. If you wanted to reproduce Andy's plot, why didn't you use his circuit? To get the characteristic in a datasheet, you need to exactly use the conditions quoted in

This might help answer your question: The slope is greater because of V1 and R2.? ?As the voltage from V1 increases, Vc increases almost the same because the transistor is in saturation.? Ohm's law

Why do you want to modify the circuit? What is the purpose of adding resistors, and changing the base drive from a stepped current source to a voltage that also depends on Vce? I think you need to

Hello Andy,I have taken your circuit and changed the current source into voltage source ,also Imade the voltage potential the same way put the voltage source in the collector. I got a very close plot

Here is your problem.? You either obtained a bad copy of your symbol file CD4013B.asy, or you (or someone in your group) modified it, and that's causing that error. Download this file: then either

The error I get is: That happens because the symbol cd4013b.asy attempts to load the library file CD4000.lib, whereas your simulation only has CD4000_v.lib. Where exactly did that symbol file come

I am trying to work with the CD4000_v.lib and am getting errors when trying to run. Would someone provide me some guidance as to what is set up in error? File uploaded to temp: CD_test.zip This is

Got it. Thank you Andy.

Do you wish to sweep the curves of this one unique circuit?? Or do you wish to sweep the curves of a PNP transistor? If you want to plot curves of this one unique circuit, then first you need to know

Your message is confused, your.ASC is unsuitable. Looking at currents will not tell you about saturation, which is when Vce drops to a very low value, like 0.4 V or less. It never does that in your

Hello,I would like to try and implement the caracteristics with the circuit I made (attached) By sweeping V1 (emitter source I see 0 current increases after Vbe>0.7) Hopwever I cant see if the PNP is