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Can you please include the missing LTspice symbols and SPICE models?? We can't help you without them. LM317A_TRANS ADA4084-2 (The latter might be in newer LTspice versions, but the computer I am

I never pretend or intend for someone else to do the hard work. That is for me to try, because that way I learn. What I did need help on that thread was with adding a HP filter for a specific very low

That is not quite true. The Laplace version has the disadvantage that the Laplace transform from frequency domain to time domain sometimes does not produce the right result - but sometimes it does,

Apologize for the wrong email heading you just received. This is the corrected one. Sent: Sunday, March 30, 2025 9:00 AM To: [email protected] Subject: Re: [LTspice] Model of BF970 ? Hi All, In the

Hi All, In the uploaded file test.asc, I’m having a problem with a simulation getting stuck. Would appreciate a look. Thanks, Chris

I've learned there's two anti-RIAA filters you put at the input of preamp to be simulated: the laplace on and and RC passive one. All my sims with RIAA premps have the passive filter at the input,

Hi, i have been interested in bipolar NDR devices similar to the Lambda-Diode and did some basic simulations which i can share later, if there is interest. I can also recommend the publications by

A constant power load is an example of a circuit with negative resistance. A common example of a constant power load is a switch-mode converter. Quite a few SMPS designers don't appreciate this. Try

The circuit referenced in this note does have the advantage of using only NPN transistors and no zener. However, the I/V curve is less well defined and you have less control over the peak/valley

Along a similar line, this circuit placed in LTspice, provides negative conductance. Generate a single DC source sweep on applied V and monitor source current.

Actually, you can tell quite a lot about even an audio circuit's performance, by looking at its square wave response.? Tilt in the flat tops or ringing on the edges tells you that something is amiss

A negative resistance circuit with brief description has been uploaded to: /g/LTspice/album?id=301539 Have fun Jim

Andy, I saw that.? Am going through advisories and FAQ? - currently the basic beginner's tutorial- and come up to speed with any and all of relevance. Appreciate the leg up! -- William, k6whp

RIAA is intended for audio applications. Why in the world would you even think of square wave input? OK, transient over-load behavior might be one reason, but I think that the OP is a long ways from

I think I have the circuit you need. It is circa-1965 and uses 3-4 bipolar transistors, a zener diode, and a handful of resistors. All components are "garden variety" with nothing special. It works to

Andy, Thank you. I was to have uploaded the .asc file into temp per the group protocol but your answer will suffice. Appreciate the advisory and support. -- William, k6whp -------------------- "Cheer

I uploaded your schematic file.? It is "RF_Filter_Chebyshev.asc" and it is currently in the Temp ( /g/LTspice/files/Temp ) folder, in the group's Files (

Andy, I did so instinctively and THEN read the group webpage. My apologies for the oversight. -- William, k6whp -------------------- "Cheer up, things could get worse. So I cheered up and things got

It's a pretty simple reason, which looks obvious after you realize it. Your signal source has a 1 (volt) amplitude and 50 ohm source impedance.? It is a Thevenin source, so you've got 1 volt behind

Even better:? Why not read the group's guidelines on the main group webpage. You attempted to paste your schematic file into the message.? Never paste or attach any files into a group message. Andy