Do you get to see the menu bar? If so, you may just need to click on View --> Toolbar to make the tools appear.
There's no probe button as such, though. Double click on any node to plot the voltage at that point, or single click to add the voltage plot to any axes which already exist. If you hover over a pin of a component, then the pointer changes to a different symbol which is used to plot current.
Do you get to see the menu bar? If so, you may just need to click on View --> Toolbar to make the tools appear.I thank you so much for your honest reply, but for some reason, my version of LTSPICE does not have this. I think I will download a new LTSPICE version.There's no probe button as such, though. Double click on any node to plot the voltage at that point, or single click to add the voltage plot to any axes which already exist. If you hover over a pin of a component, then the pointer changes to a different symbol which is used to plot current.Hmm, doesn't do that either! I will download another LTSPICE. Thanks a lot!
The mac version of LTSPICE is really just a joke, I don't think it is even the full program what is found in the windows version. This is really sad, I don't use Mac out of preference; it is really all I have available to me.
The mac version of LTSPICE is really just a joke, I don't think it is even the full program what is found in the windows version. This is really sad, I don't use Mac out of preference; it is really all I have available to me.
Oh, all the SPICE stuff is there in the native Mac version - it just doesn't have the menus for the simulation parameters, etc., so you have to be able to do it old-school
Someone has taken a slightly older Windows version of LTSPICE, wrapped it up in the Wine (not an) emulator, and released it for OS X. Last I tried it updated to the current version without problem, though manually adding components was a bit of a pain (due to the Windows directory structure being buried in the OS X appbundle). Googling "LTSPICE Wineskin" should find it.
edit: Here's a link to the Wineskinned version - http://irust.in/2011/07/ltspice-for-mac-osx/ - but it's not responding for me at the moment...
Oh, well that's a suprising reply. I see. Well then how the heck to I use the probe to run the program??
So, excuse the german language, the given info is:
fo= 2kHz
D = 0,2
Hi intercomposed,
as a supplement to the prgram related answers which were given already I like to mention some filter related points:
1.) At first, "Überschwingweite" is a filter property to be observed in the time domain (step response). In english it is "overshoot" and can be measured/simulated using an input step. This is a result of the designed filter (depends on the given D value).
2.) Your filter topolgy is known as "Tow-Thomas" structure (in case you want to google some additional information).
3.) Question: Do you know the meaning of the given data (fo and D) ? These are quantities that appear in the transfer function and are related to the pole position in the complex frequency domain. If necessary, I can give you some more explanations.
4.) In any case, you need the transfer function for proper dimensioning of the filter. Do you know how it is derived?
Run the simulation (by clicking on the little running man icon at the top of the window), then hover the cursor over the node you want to measure. Watch the cursor turn into a probe...
(But if you haven't set up your simulation parameters / SPICE directives e.g. ".tran 2m startup" or whatever, it won't run. Either read a few of the many fine articles on how to use a command-line SPICE, or see if you can find another source for that Wineskin-ed Windows version I mentioned - the Windows version of LTspice almost walks you through building the SPICE directives with a point-&-click menu...)
General questions:
Where are the values coming from?
Did you calculate the rest of the parts values? Without the transfer function?
By the way - I have simulated your design. It seems to be OK.
Do you know the meaning of fo and D?
Answering your question regarding opamp: No - it does not matter which opamp you are going to use. For the frequency range under discussion, each type will be OK.
Most of the values were already given (R and C). I am not sure about my Voltage source.
Most of the values were already given (R and C). I am not sure about my Voltage source.
I have realized that some values were given. But what about the rest?
More than that - what is your problem now?
You have a circuit which looks good - what else?
(But if you haven't set up your simulation parameters / SPICE directives e.g. ".tran 2m startup" or whatever, it won't run. Either read a few of the many fine articles on how to use a command-line SPICE, or see if you can find another source for that Wineskin-ed Windows version I mentioned - the Windows version of LTspice almost walks you through building the SPICE directives with a point-&-click menu...)
OK - so I am out of the game because your present problem is more related to the program and not to filter theory, OK?