Timeline for Why is my simulation results are not matching to the theoretical data?
Current License: CC BY-SA 3.0
11 events
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| Sep 16, 2016 at 20:10 | history | edited | cppiscute | CC BY-SA 3.0 |
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| Sep 1, 2016 at 21:15 | vote | accept | cppiscute | ||
| Sep 1, 2016 at 17:50 | answer | added | a concerned citizen | timeline score: 1 | |
| Sep 1, 2016 at 13:37 | comment | added | cppiscute | @aconcernedcitizen...thanks. BTW if you have time then please do share an example for using a E or G source, that will be a huge help to me. Thanks. | |
| Sep 1, 2016 at 12:32 | comment | added | a concerned citizen |
I'm a bit on the run now, but I would say it's safe to trust what LTspice is showing. :-) Given your transfer function, you could try it in LTspice, too, with an E source with the value Laplace=(s^2+10)/(s^2+0.5*s+1) (just an example). Note that this is the only place LTspice accepts ^ as exponentiation, elsewhere is **. One more note: don't run a Laplace function in .TRAN, it's very inefficient and prone to errors; use RLC to create your own transfer function and .TRAN will run blazingly fast (and accurate). That's it, gotta run. Good luck!
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| Sep 1, 2016 at 11:29 | comment | added | cppiscute | @aconcernedcitizen...By doing the ac analysis I got the magnitude and phase response...and which are clearly not matching to what I obtained from transfer function. so there is something wrong in the transfer function ? | |
| Sep 1, 2016 at 11:20 | comment | added | cppiscute | @aconcernedcitizen...Thanks. but if you can, then can you please confirm on above transfer function ? | |
| Sep 1, 2016 at 6:09 | comment | added | a concerned citizen |
Note that the modulator has a default output resistance of 1 Ohm. To change it, add Rout=<value> in its attributes. Also, if you only need a fixed AM amplitude, there's no need for an extra voltage (V1); instead, you can add Vhigh=<value> and Vlow=<value> to the attributes, just like any A-device.
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| Sep 1, 2016 at 6:01 | comment | added | a concerned citizen |
See this: electronics.stackexchange.com/questions/255085/… . In your case, delete A1 and V2, connect V1 to R1 and replace V1's value with AC 1. Then, instead of a Transient analysis, do an AC analysis, by Right-Clicking on the .tran 0.1 and changing to the correct tab. You can choose any type, but here's a start: type = decade, nr. points = 100, start = 1k, stop = 1G.
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| Sep 1, 2016 at 3:14 | history | edited | cppiscute | CC BY-SA 3.0 |
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| Aug 31, 2016 at 23:24 | history | asked | cppiscute | CC BY-SA 3.0 |