Good tutorial. Therefore, when you are setting the mag between 0 and 1, the sweep must not be step size to 40, because the reflection coefficient is maximum 1. I think it is linear sweep with number of step set to 40. For the angle theta, between 0 and 360, a number of step can be 40 as well.
Thanks a lot for posting this. It's very useful. I have a few questions: I saw in the select design variable form that you selected the magnitude variable and swept it from 0 to 1. I think you meant to choose 40 steps, but you didn't select the "number of steps" radio button. The form still said step size. Should it have been number of steps? Also, it seems 40 magnitude and 40 phase steps would run 40x40 harmonic balance simulations, is that right? It seems like it would take much longer than you show in your video. How long does it take?
Michael Mack Michael Mack You are welcome. I ran this simulation in dedicated linux server in our lab. HB doesn't take more than 2/3 seconds in server. At 12.52 and 13.06, I meant to select 'number of steps' instead of 'step size' which was mentioned in the video's description :-) TH-cam no longer supports in-video text banner, so I placed that info in the description. And nope, step size doesn't determine 40x40 simulation. HB's run length and problem size are primarily determined by no of harmonics. Please like and subscribe for more new videos. Thank you
@@tensorbundle For me when I do HB simulations it takes so many minutes. what do you think could be the reasons?. It doesn't converge sometimes and sometimes it shows that simulation run at some particular mag or theta is failed
Thank you for this wonderful tutorial on load-pull for power amplifiers. you used PSS analysis, what about hb? and you have done it for single-ended output, what about differential output. If it is possible do you have personal contact, I want to discuss some issues related to this Topic in RF amplifiers. Waiting for your kind response. 🌹🌹🌹 best regards.
thank you very much for this useful video. can you provide a demo about how to build a matching circuit using smith chart, i.e load-pull/source-pull analysis.
thank you . but i have a question when i run load pull there is a warning that in some theta the r in the portadapter is negative. do you know whats happening?
Hello, Many thanks for this informative video. I want to run source pull and I put port adaptor in gate of transistor, but my contours are very strange can you please help me with that? Thanks in advance
jagadeesh I Clearly you have not participated in IC tapeout fab. Defining Vdc=0 as VSS in that test bench allows resuablity in cell. Leave it. It is beyond your concept. Use ground if that suits you.
@@jagadeesh103 i think you need to use the port adapter at the source series with the source and do the same or design ur PA in cadence and take the circuit to ads using goldengate.
Could you please tell us how to calculate or which analysis to be Done to find the output power of amplifier in dBm?? (my amplifier has a gain of 25dBm)
Good tutorial. Therefore, when you are setting the mag between 0 and 1, the sweep must not be step size to 40, because the reflection coefficient is maximum 1. I think it is linear sweep with number of step set to 40. For the angle theta, between 0 and 360, a number of step can be 40 as well.
Thank you for the excellent tutorial to help me get familiar with Cadence Virtuoso!
You're very welcome!
Load pull at 300 GHz?
hi bro I am unable to find rfExapme library in my cadence software.can you help me in getting that library bro.it will be a great help
i can send it to you. if you still need that
@@chuyu1107 I need it if you have still. Would be very helpful
Thanks a lot for posting this. It's very useful. I have a few questions:
I saw in the select design variable form that you selected the magnitude variable and swept it from 0 to 1. I think you meant to choose 40 steps, but you didn't select the "number of steps" radio button. The form still said step size. Should it have been number of steps?
Also, it seems 40 magnitude and 40 phase steps would run 40x40 harmonic balance simulations, is that right? It seems like it would take much longer than you show in your video. How long does it take?
Michael Mack Michael Mack You are welcome. I ran this simulation in dedicated linux server in our lab. HB doesn't take more than 2/3 seconds in server. At 12.52 and 13.06, I meant to select 'number of steps' instead of 'step size' which was mentioned in the video's description :-) TH-cam no longer supports in-video text banner, so I placed that info in the description. And nope, step size doesn't determine 40x40 simulation. HB's run length and problem size are primarily determined by no of harmonics. Please like and subscribe for more new videos. Thank you
@@tensorbundle For me when I do HB simulations it takes so many minutes. what do you think could be the reasons?. It doesn't converge sometimes and sometimes it shows that simulation run at some particular mag or theta is failed
Thank you for this wonderful tutorial on load-pull for power amplifiers. you used PSS analysis, what about hb? and you have done it for single-ended output, what about differential output.
If it is possible do you have personal contact, I want to discuss some issues related to this Topic in RF amplifiers.
Waiting for your kind response. 🌹🌹🌹
best regards.
Where is the library rfexamples that you are using? could you specify.
Actual relevant instructions: 4:23 to 5:09, 9:28 to 9:58, and 11:39 to 15:25
thank you very much for this useful video.
can you provide a demo about how to build a matching circuit using smith chart, i.e load-pull/source-pull analysis.
You are welcome. I will consider it in one of the future videos.
I need that too please upload one of these videos
Thanks for this amazing video. Could you please explain how we can get the efficiency contours also.
where can i get the portAdapter? i dnt have the rfExamples library
thank you . but i have a question when i run load pull there is a warning that in some theta the r in the portadapter is negative. do you know whats happening?
Hello, Many thanks for this informative video. I want to run source pull and I put port adaptor in gate of transistor, but my contours are very strange can you please help me with that? Thanks in advance
fabulous videos sir....extremely helpful....thanks a lot...
kaushik mandal Thanks for your appreciation.
can you make video to do load pull and source pull with using portadaptor but using Harmonic balance simulation
Why did you use Vdc=0 7:54 . You can connect everything to ground right
jagadeesh I Clearly you have not participated in IC tapeout fab. Defining Vdc=0 as VSS in that test bench allows resuablity in cell. Leave it. It is beyond your concept. Use ground if that suits you.
@@tensorbundle Well, now that you mentioned its benefits, I will use VSS. I would like to know how to do source pull in cadence
@@jagadeesh103 i think you need to use the port adapter at the source series with the source and do the same or design ur PA in cadence and take the circuit to ads using goldengate.
Could you please tell us how to calculate or which analysis to be Done to find the output power of amplifier in dBm?? (my amplifier has a gain of 25dBm)
hi,
First of all your video was helpful but I have query related to 28 nm technology what we can use in place of port adapter if it is unavailable.
is there any paid course for full set of cadence training?
no sorry
Thank you, it's very helpful.
Glad it was helpful!