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March 26, 2013 at 7:53 pm #16301paulopcaGuest
I’m trying to run a simulation of a power amplifier in MultiSim 11 but I’m not getting. Could someone please help me?
Attached is the file MultSim 11.
I am very grateful to anyone who can help me.March 28, 2013 at 8:41 am #164084soBRutk12Guest
cool project. Are you sure that all wirings are ok? is there a reference document for this project?March 28, 2013 at 2:32 pm #164094soBRutk12Guest
anyway I think to know what’s wrong with your project, you ‘ve connected the MJE340 and MJE350 emitters with pin 4 and pin 7 of TL071CP, but the SPICE model of TL071CP models only pin 1 2 3 4 5. Try to connect the emitters with pin 1 and 5.March 30, 2013 at 9:45 am #16410paulopcaGuest
Thanks for your reply.
As a reference document see the attached file.March 30, 2013 at 10:40 am #16411paulopcaGuest
In fact, pinout TL071CP the datasheet does not match the pinout on the spice model.
However, if you build some simple circuits to test will confirm that the circuits work when mounted according to the datasheet and not as spice model.
See the attached file.April 1, 2013 at 7:22 am #164124soBRutk12Guest
you’re right about the pins. A question, the schematic you’ve uploaded is based on a working project or it’s simply a your test?April 1, 2013 at 10:50 am #16413paulopcaGuest
It is basede on a working project.
It’s amazing that I’m having difficulty to solve this problem. I posted on various vanilla2s and so far not managed to solve this problem. I’m thinking of changing simulator, even in the official vanilla2 of the Multisim (National Instruments) got no answer.April 1, 2013 at 1:30 pm #164144soBRutk12Guest
upload the original schematic of the working project pleaseApril 2, 2013 at 6:40 am #16415paulopcaGuest
The schematic that I uploaded is the working projectApril 6, 2013 at 6:36 pm #164184soBRutk12Guest
your schematic looks more like a Kuroda amplifier than an Alexander amplifier and it seems that there’s nothing wrong. I’ve simulated with LTspice , with reliable spice models of MJL1302A, MJL3281A, MJE340, MJE350, BD139, BD140, TIP41C and TIP42C, and it works fine. Try to test the same models into Multisim.April 8, 2013 at 9:29 pm #16419paulopcaGuest
I thank you for your help.
I’m trying to learn how to use the OrCAD and now I will also try to learn to use LTspice.
The models that you used already part of LTspice or I have to download them from the Internet? If I have to download them where you found them?April 9, 2013 at 6:26 am #164204soBRutk12Guest
No you don’t have to download, I’ve added them with SPICE directivesApril 9, 2013 at 2:20 pm #16421paulopcaGuest
I did the simulation in Multisim with the TL071 model fitted with discrete components you posted.
The simulation work and the values measured in the actual circuit are quite close to the values provided by the simulation.
Attached is an image of the simulation.April 10, 2013 at 5:37 am #164224soBRutk12Guest
excellent, the file seems to be a multisim12 file, can you convert it to a multisim 11?April 11, 2013 at 6:41 am #16424paulopcaGuest
I could not convert to version 11.
Attached is the complete circuit in pdf.
I posted the amplifier circuit in version 11, you only need to add the part of the TL071.
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