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Hi, : Thank you for the opinions replied. I found another method, to record all recursive paths into single line for every recursion path in old LTspice V.17. It's using the 'dos command window' app,

abid asked, " what's the difference between *hierarchical sub-schematic and subcircuit? Are they the same?* " Yes and no.? Mostly no. A schematic is a diagram that you can draw. A subcircuit is a

Lser and Cpar are the the internal bond wire and package capacitance, respectively. They are actually present in all packaged semiconductor devices but cannot be incorporate

what's the difference between *hierarchical sub-schematic and subcircuit? Are they the same?* In the schematic that Tony uploaded, is it necessary to write the following lines? Won't just using the

It's most likely a typo. "C" and "D" are adjacent on a UK keyboard. Having not noticed initially, it proliferated and I have loads of files prefixed with "SRC" in that work folder. ? -- Regards,

abid, In many SPICE programs (which might include LTspice), the built-in diode model's diode capacitance follows these formulas: C = Cj*area + Ct Cj = Cjo*(1-Vd/Vj)^-M for Vd ≤ Fc*Vj =

abid, The circuit that is shown in 4.png represents a circuit of a diode and the package parasitics, and maybe a bit more. The basic diode (and transistor) models in SPICE are good for on-chip

Thanks Andy for the clarification. I think I have started to get things. I am confused about the circuit model of the SRD. Different papers have used different circuits. I have uploaded a circuit

abid wrote, " What does Lser, Cpar, D1 mean? " Those are SPICE Netlist elements.? Any element beginning with an 'L' is an inductor.? 'C' is for capacitor.? 'D' is for diode.? The names Lser, Cpar,

Thanks. I had some questions. How do I create the SRD subcircuit? * .subckt SMMD805 1 2 Lser 1 11 1n Cpar 11 2 2p D1 11 2 D_805 * What does Lser, Cpar, D1 mean? Also what does the numbers beside these

Tony wrote, "... I have uploaded one of my old schematics ( /g/LTspice/files/Temp/SRC_PulseGen.zip )... " Tony, I am wondering, what does the "SRC" stand for, in the filenames?

John Woodgate wrote, referring to the SDD model: Could it be 'translated', if it's not too big? If one had a copy of the SDD model in question, I am sure it could be translated to Spice syntax with

The Master of Science Thesis uploaded here (/g/LTspice/files/Temp/Electrical%20Pulsing%20of%20a%20Laser%20Diode%20for%20Usage%20in%20Fluorescence%20Microscopy.pdf) contains the

I have found out following detail regarding setting local and global temperatures, read LTspice code below. Main point is, that you cannot pass the temperature variable in a function to the subcircuit

I have just uploaded the SPICE model of the MA44769-287T Step Recovery Diode as found in MACOM's website. It is here: /g/LTspice/files/Temp/MA44769-287T_SPICE_MODEL.zip

Tony's schematics have the opposite problem of Helmut's from 2006.? Whereas the fonts in Helmut's are tiny, Tony makes his schematics with text that overlaps other text, making many of his schematics

Oops. Yeah, I do that too. ? Fixed. -- Regards, Tony

Tony, you forgot to include your symbol file "diode-steprecovery.asy". Andy

abid wrote, " Is the whole circuit SRD? It's a bit confusing, " referring to step_recovery_diode.asc from 2006. No, I don't think so.? Only about half of it is. Also, the text is rather small, but

It's just the diode itself that's the SRD. I have uploaded one of my old schematics </g/LTspice/files/Temp/SRC_PulseGen.zip> that uses the SRD in shunt mode, which is often more