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The SDD element is a ‘Symbolically Defined Device’ that is used in Agilent ADS simulator. The ADS syntax for the SDD element is definitely not Spice compatible. Ray Anderson

Andy I wrote, "If these are indeed the same elements with the same values in both figures, then it suggests that the "SDD" component represents only these parts of Figure 3: Cr, Rf, Cf, Vo, and the

abid wrote, " I don't know how to implement the SDD component in Figure 5 " This might not answer your question, but a first-look suggests that the "SDD" component might be the circuit in Figure 3.?

Hi Andy, My guess is figure 5 is the spice model and figure 3 is the equivalent circuit of the SRD in the ResearchGate article. I am not sure how to model the SRD based on the figures given on both

John wrote, " it includes a Spice model, but of course I don't know how good it is. " I am looking for that SPICE model, but I'm not sure if I am seeing it.? Are you referring to the schematic

Hello, I saw that paper. This is actually the model I am trying to implement. For the mentioned paper, I don't know how to implement the SDD component in Figure 5. How the equation 2 of that paper can

We do not encourage posting links to 3rd party sites, but Research Gate is reliable, so:

Thank you for your response. I have uploaded the pictures of the figures and equation. /g/LTspice/album?id=295221 Please let me know if you can't access the photos. I will really

Unfortunately, many of us don't have access to ieeexplore without paying $$, so we can't see the figure 2 you are referring to. If you are able to, it would help if you could transcribe it into an

Could someone tell me how can I model a SRD in LTspice and use that as a component in other circuits? I am new in LTspice and don't have much idea. I am attaching a link to a paper.

Thanks everyone, OK, Andy I'll look into it now. thanks.

john23 asked, " But its for PSPICE.What could be done to convert it properly into LTSPICE? " Probably nothing. I might be remembering incorrectly, but I think you were already using that UCC21220

Hello, I want to test also the suggested UCC21220A. But its for PSPICE.What could be done to convert it properly into LTSPICE? Or i just need to treat it like LTSPICE and use the create symbol in the

Yes. you can't use ^ fro exponentiation in LTspice,, except in Laplace expressions. Use **. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

The other problem is that you used the wrong formula for a varying frequency. Yes it seems to be that " sin(pi*20e3*time*time) " would result in a frequency equal to "time".? But that is incorrect,

I guess you forgot that "^" means exclusive-OR, not? exponent (except in Laplace). -- Regards, Tony

I believe I solved it by using V=sin(pi*20e3*time*time) instead.

Hello, I am trying to sweep frequencies to 20K with the behavioral voltage source using V=sin(pi*20e3*time^2). I get no error, yet I don't get the same results as I do using a wav file.

* OPA855 - Rev. A * Created by Sean Cashin; 2020-06-04 * Created with Green-Williams-Lis Current Sense Amp Macro-model Architecture * Copyright 2020 by Texas Instruments Corporation OPA855 does not

* OPA855 - Rev. A * Created by Sean Cashin; 2020-06-04 * Created with Green-Williams-Lis Current Sense Amp Macro-model Architecture * Copyright 2020 by Texas Instruments Corporation