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Ah. Got it. It was "Edit->Edit Attributes..." I was missing. Thanks again.

<snip> However, some clever contributor to this group has provided a means to

In message <j4t6tu+4c59@...>, dated Thu, 15 Sep 2011, Tony Casey <tony@...> writes: Naive question. Why would you want to do that? If you have s-parameter files, presumably they came

So, here it is: .model 1N6628 D(Is=20.73u N=2.871 Rs=11.4m Ikf=.269 Xti=3 Eg=1.11 Cjo=97p + Isr=49.6E-30 Bv=660 Ibv=50u Tt=74n Iave=2.3 Vpk=600 mfg=Microsemi type=Silicon) Best regards, Gerhard

--- In LTspice@..., Philip Bellingham <rmhc78a@...> wrote: > > Tony, > > While LTspice may not be the ideal tool for RF design, it can still be quite > useful. > > You are correct that it

Oh, I just noticed that you wrote in the subject line 1N6628 and in the text 1N6618. Which one is your favourite? If you need 1N6628, I will try to create a model, too. Gerhard

Hello Dan, these are approximate models for the requested diodes, newly created from the datasheets' curves/values: .model 1N5811 D(Is=850n N=1.938 Rs=4.235m Ikf=2.584 Xti=3 Eg=1.11 Cjo=146p +

Hello STM, You can see my attributes in the text file above. It's different from what you had in your your symbol. Normally you don't look with a text editor. You should open my symbol with LTspice

Hello Dan, If you can't find models for your diodes, it's not the end of the world, but it will involve more work. (But think of the satisfaction.) Firstly, for a tutorial, start here:

Hello Again, Just to finish this topic out, today I generated the "Skip" file successfully. Since this is an SMPS circuit whose inductor currents are not zero, I edited the "Skip" file to change its

Tony, You are right about the path - I messed up, sorry. I will follow the check box suggestion from now on. Thanks again, STM

I opened the AD8336.asy you had in the zip file with FILE OPEN in LTspice but I don't find any attributes. When I open it in notepad the only attributes are pin references. Version 4 SymbolType BLOCK

Hello STM, I made a specific symbol which isn't editable. All symbol of the LTC-opamps are made this way. Please open the symbol(.asy) with LTspice to see which attributes I have set. Best regards,

Tony, While LTspice may not be the ideal tool for RF design, it can still be quite useful. You are correct that it does not have native support for producing a Smith chart. However, some clever

Hello, I don't know which web you checked, but there are thousands of links relating to class D amplifiers, many of them on the semiconductor manufacturers' websites, check there first. In general,

Helmut, Thank you very much for your time and help. So much for me to learn. I integrated all your schematic changes into mine and it works great. I put the changes in one at a time to observe the

Hello Keantoken, If you're doing RF design, on oscillators, for example, it is essential to be able to see both real and imaginary parts clearly and separately without having to do mental arithmetic

Indeed, and that is the reason why I just use the datasheet and the universalopamp symbol to get rid of the problems. Most times the universalopamp makes a better job. - Henry -- ehydra.dyndns.info

Tony, Thanks for answering. I thought FILES&#92;AD8336 in my help request would indicate where all the files were. Is there another way I should have done it? STM