开云体育

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

In message <kt8hbj+5vsb@...>, dated Tue, 30 Jul 2013, jean_claudeabeille <jean_claudeabeille@...> writes: You can't find a formula on the Web, even though there is one, because it's not a

Hi Is anyboby here who can explain me how to calculate Ib in this circuit : Draft2.asc. I found no formula(s) on the web while LTSpice knows. Thanks.

I don't know what I awaited, but I see a clear maximum. And it gets closer to 900MHz. Nice. I simulated it with .TRAN and it worked well. The simulation through the first transisitor was congruant to

In message <kt7o77+jld6@...>, dated Tue, 30 Jul 2013, christianvierck <christianvierck@...> writes: No, they MAY be resonant circuits but, being passive, they cannot be oscillating

Okay thank you. I have found one. http://pdf.datasheetcatalog.com/datasheets/166/501408_DS.pdf I have searched on a website which sells devices linked with datasheets and didn't found a hint. After

Hello, The MV2105 is too different from the BB105. You should search for a datasheet of the BB105. Best regards, Helmut

Oh thanks a lot. I will try MV2105 first and try to build an own model with your link afterwards.

It sounds like I have to focus on the silver wire in the first case to get a presentable result. I can't give a feedback to this point. But it is very hard to discover how to get a result with such a