Great Tutorial Anurag. Lots of features that I had to learn by searching through the internet you have covered in several tutorials. Please provide more advanced topics such as this one. I really appreciate it.
Thanks for this video, I asked a question in Tutorial6 and you sent me back here. Here I see that you optimize the components (inductance values, capacitances). And I would like to know if I have a verilogA that has mosfet equations will it be possible to optimize the parameter of the VerilogA equation, knowing the I-V curves of the MOSFETs from the B1505 characterization. Thank you for your understanding.
Dear Anuraga, I am trying to create an AM pulsed RF source source in genesys. RF on for a time then RF off. I see fancy modulations in the Multi source but I don't see a simple 100% AM pulse with a time on and a time off. How can I create such a thing? I want it to go into an ADC then analyze the output spectrum from the ADC. Your videos are very helpful. Many thanks. Dave
Hi Dave, From the description it seems you would like to do a Pulse Modulation instead of AM per say? Also, if you would like to analyze the effects of ADC and related distortion etc then I would advice you to use SystemVue instead of Genesys because there you could utilize the power of Mixed Signal Analysis. Process would be to create a Pulse Modulated waveform->pass it thru your RF system->Feed this to ADC block in DataFlow domain and look at the spectrum and other related metric. If you want to do this analysis on System level using Spectrasys then it would be very straightforward as SystemVue has the same Spectrasys engine for you to use.
@@BhargavaAnurag Thank you for the advice. You are correct, I'm looking to see the output of an ADC while applying a pulsed RF signal. I want to see the theoretical effects and compare them to our DAC while having it hooked up to a SpecAn. How could I approach this in ADS? Many Thanks, Dave
Hi Dave, You could use PTolemy in ADS if you wish to do so however I would still recommend you using SystemVue for this purpose as it is more up-to-date with these kind of analysis and very simple to use. Refer to this playlist to learn about SVue more: ua-cam.com/play/PL9OnCetH8TYrdiKM74YXZ8KIxIU1VgK8p.html
Hi, ADS does have Filter Designguide (Filter and Impedance Matching), Passive Circuit Designguide which can help to synthesize different kind of circuits. Look at the Designguide menu in your ADS schematic page.
Hello Anurag, few days back i commented on one of your videos about how to find the equivalent RLC value from the touchstone file imported from CST to ADS. I followed your suggestions and finally i resolved that. I really thank you for that. Can you please tell me on what basis the optimization (while doing reverse engineering) works. Is there any algorithm dedicated for that ? This is one of the question being asked to me when i was presenting the A vs B modelling.
Hi Nilotpal, There is no special optimization algorithm dedicated for this but depending on the situation & how far you are from the goals, number of variables etc some algorithm might work better than the other. Concept here is pretty simple, in a normal optimization your set 1 fixed number as a goal to be achieved within a specific frequency range but if we need to fit the frequency response characteristics between 2 circuits then instead of optimizing S11 or S21 etc, we compute the difference between our reference circuit (fixed) and the circuit to be optimized which obviously will be frequency dependent and then simply optimize this difference to be near 0. Hope this clarifies.
Hi,Could you please give a short tutorial on parasitic network extraction and de-embedding of RF transistors? This will be very helpful for broadband continuous mode PA design.
Hi, I couldn't fully understand your question but below are my initial comments: a. We don't do parasitic extraction in ADS as such because we perform EM analysis which contains all the layout parasitics and this technique is much more accurate than extracting parasitic network which largely RC network, some tools claim to extract RLC extraction but accuracy is always questionable, so I tend to believe on EM results more. b. I couldn't understand what do you mean by de-embedding RF transistors?
Extract the parasitic capacitance and inductance introduced by the package, the output capacitance of the transistor itself(Cds) from the RF Power Transistor model This is very useful for continuous mode PA designs like Class F and inverse Class F.@@BhargavaAnurag
That's great, now I can realise the importance of previous 20 videos I watched. Is there a way to convert this lpf or bpf to a layout using microstrip? Or is there a way to do same kind of optimization on ADS layout, for example, to do optimization on the widths of various stubs' widths and lengths to see the performance variation?? I usually do that in CST/HFSS but it'll be of great help if it is available on ADS layout as well. Thanks for helpful tutorials 👍
Great Tutorial Anurag. Lots of features that I had to learn by searching through the internet you have covered in several tutorials. Please provide more advanced topics such as this one. I really appreciate it.
You are most welcome..!! Keep Learning...👍
Great videos, Thank you
But where to get these reference_SnP files?
You can use your own S2P files that you can create from your own sample schematic or use any vendor provided S2P files.
Thanks for this video,
I asked a question in Tutorial6 and you sent me back here.
Here I see that you optimize the components (inductance values, capacitances). And I would like to know if I have a verilogA that has mosfet equations will it be possible to optimize the parameter of the VerilogA equation, knowing the I-V curves of the MOSFETs from the B1505 characterization.
Thank you for your understanding.
Difficult to comment and I would recommend you contacting your local/regional Keysight tech support team to get help on this.
@@BhargavaAnurag Ok thanks for replying
I searched IC_CAP as you recommend and found some solution to my questions.
@@BhargavaAnurag Ok thanks for your answer, I'll see with Keysight support team
Dear Anuraga, I am trying to create an AM pulsed RF source source in genesys. RF on for a time then RF off. I see fancy modulations in the Multi source but I don't see a simple 100% AM pulse with a time on and a time off. How can I create such a thing? I want it to go into an ADC then analyze the output spectrum from the ADC. Your videos are very helpful. Many thanks. Dave
Hi Dave,
From the description it seems you would like to do a Pulse Modulation instead of AM per say? Also, if you would like to analyze the effects of ADC and related distortion etc then I would advice you to use SystemVue instead of Genesys because there you could utilize the power of Mixed Signal Analysis. Process would be to create a Pulse Modulated waveform->pass it thru your RF system->Feed this to ADC block in DataFlow domain and look at the spectrum and other related metric. If you want to do this analysis on System level using Spectrasys then it would be very straightforward as SystemVue has the same Spectrasys engine for you to use.
@@BhargavaAnurag Thank you for the advice. You are correct, I'm looking to see the output of an ADC while applying a pulsed RF signal. I want to see the theoretical effects and compare them to our DAC while having it hooked up to a SpecAn. How could I approach this in ADS? Many Thanks, Dave
Hi Dave,
You could use PTolemy in ADS if you wish to do so however I would still recommend you using SystemVue for this purpose as it is more up-to-date with these kind of analysis and very simple to use.
Refer to this playlist to learn about SVue more: ua-cam.com/play/PL9OnCetH8TYrdiKM74YXZ8KIxIU1VgK8p.html
Wow! So much fun. Does ADS have an automatic tool for such circuit synthesis? MatLab has Matching Network Designer which is not as intuitive.
Hi,
ADS does have Filter Designguide (Filter and Impedance Matching), Passive Circuit Designguide which can help to synthesize different kind of circuits. Look at the Designguide menu in your ADS schematic page.
This hack is extremely helpful for multi-variable multi-goal optimization. More such tricks are reqd. to ease our design and make it efficient.
Hello Anurag, few days back i commented on one of your videos about how to find the equivalent RLC value from the touchstone file imported from CST to ADS. I followed your suggestions and finally i resolved that. I really thank you for that. Can you please tell me on what basis the optimization (while doing reverse engineering) works. Is there any algorithm dedicated for that ? This is one of the question being asked to me when i was presenting the A vs B modelling.
Hi Nilotpal,
There is no special optimization algorithm dedicated for this but depending on the situation & how far you are from the goals, number of variables etc some algorithm might work better than the other.
Concept here is pretty simple, in a normal optimization your set 1 fixed number as a goal to be achieved within a specific frequency range but if we need to fit the frequency response characteristics between 2 circuits then instead of optimizing S11 or S21 etc, we compute the difference between our reference circuit (fixed) and the circuit to be optimized which obviously will be frequency dependent and then simply optimize this difference to be near 0.
Hope this clarifies.
Awesome thanks
an amazing explanation is very helpful thanks brother
Glad you liked it...😊
Hi,Could you please give a short tutorial on parasitic network extraction and de-embedding of RF transistors? This will be very helpful for broadband continuous mode PA design.
Hi,
I couldn't fully understand your question but below are my initial comments:
a. We don't do parasitic extraction in ADS as such because we perform EM analysis which contains all the layout parasitics and this technique is much more accurate than extracting parasitic network which largely RC network, some tools claim to extract RLC extraction but accuracy is always questionable, so I tend to believe on EM results more.
b. I couldn't understand what do you mean by de-embedding RF transistors?
Extract the parasitic capacitance and inductance introduced by the package, the output capacitance of the transistor itself(Cds) from the RF Power Transistor model
This is very useful for continuous mode PA designs like Class F and inverse Class F.@@BhargavaAnurag
That's great, now I can realise the importance of previous 20 videos I watched.
Is there a way to convert this lpf or bpf to a layout using microstrip?
Or is there a way to do same kind of optimization on ADS layout, for example, to do optimization on the widths of various stubs' widths and lengths to see the performance variation??
I usually do that in CST/HFSS but it'll be of great help if it is available on ADS layout as well.
Thanks for helpful tutorials 👍
Hi Hamza,
I created a video on Parametric EM simulation and you can follow the same.
@@BhargavaAnurag thanks for the help 😊