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Hello RL, Please try my example to see and understand my point. Files > Temp > z_from_FFT_with_noise.asc Run the TRAN simulation. Plot V(z2) and I(V2) FFT of V(z2) and I(V2) with 1048576 points ->

Hello Helmut, Thank you very much! It works!

Hello, I think you missed my point. 1. If you have your designs under C:\Program Files\anywhere, then move it out of this system directory to e.g. C:\mycircuits\.... 2. The symbol of a

Exactly! Thanks. I red a tutorial about the analysis modes and understand your point now. My knowledge about this was, if you have to analyse the frequency response do a AC and if you have to analyse

In message <kt9nnr+k9tf@...>, dated Wed, 31 Jul 2013, sawreyrw <sawreyrw@...> writes: What is wrong with the statement? Do you find practical applications where a fixed DC voltage is

Thanks Helmut, I'm working with LTSPICE IV; so it isn't possible to change the top directory at "select component" to an arbitrary one - the only options are C:&#92;Program Files&#92;LTC&#92;LTSPICE

In message <kt9dt1+fgsc@...>, dated Tue, 30 Jul 2013, sawreyrw <sawreyrw@...> writes: Of course; didn't I write: 'The base current is exponentially dependent on the base voltage and the

It may be that the OP simply wants to determine what that current is (compute it). If that is the case, just run the simulation. When it is done, move the cursor over (almost) any component and you

LTspice takes the "brute force" approach. It has all the network equations for the entire circuit, and it solves for every branch current, using iteration. That is, in effect, it makes a guess, then

I think maybe he meant to write "the only thing I knew about antennas was that they are resonant circuit." If the circuit really is oscillating, the output voltage will go crazy In an AC analysis, the

Hello, You have to save

Why do you say you have to do an AC analysis? An AC analysis tells you nothing about what the oscillator is doing. It won't tell you the frequency where it oscillates. It won't tell you even IF it is

I'm trying to work hierarchically, so I created a low level schematic (myblock.asc), created a symbol (myblock.asy) for that schematic, and saved both of them at C:&#92;Program

Hello RL, It will only work when you filter the FFT-output, but the the FFT-results can't be filtered in LTspice. Thus you have to export the FFT-data and process them in an external program. This

Hello, Unfortunately I don't have a PC with a touch-screen. I would be happy if somebody having a PC with touch screen will answer this question. Best regards, Helmut Moderator

Hello Diane, If you think THE relay symbol looks to small, you could redraw the original symbol with the symbol editor. I recommend to use another filename in this case, e.g. originalname_big.asy.

Hello, Let's assume an ideal transistor with base resistance Rb=0, current gain B=BF=constant, Early voltage VAF=infinity and the ideality factor NF=1. Ib = (Is/B)*exp(Vbe/(NF*VT) VT = k*T/q