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Hi, Batman
I think both your methods are not very intuitive since you are a freshman. Try to simulate AC gain first and then you can try DC gain and transient response.
1. Make sure you have biased the circuit correctly.
2. Put one ac signal superpositioned at your input with a ac magnitude...
Measure the inputrefered voltage¤t noise in CDN without destroying the DC bias?
Hi,
I try to measure conventional noise in CDN, but something strange happened.
At first, I just put two no value voltage sources @input and output respectively and do the noise simulation. Then I find it...
Re: plot log of y axis in cadence
Hi JoannersPaulus,
I plotted my gm/id vs. |vds| and id vs. |vds| using parasitic sweeping. But why I cannot use what you said to YvsY them? The scroll down menu only contained its own x and y value rather than the proposed 'z' value. If I put two curves...
Dear friends,
I simulated a simple RF circuit and do the pss and save all. As everything is all right except the power. Why the power plot displayed to me is much smaller than I estimated? Which one should I trust?
Enclosure is the plot and my circuit is specified by a supple voltage of 1.2V...
Thank you for your help.
Actually, I made a very stupid mistake as I shouldn't add any res value to the port because the parasitic res of the spiral ind is about 1e3~1e4 order of magnitude. So if I add a 50 ohm in the output port, 50 ohm paralleling with what I actually desired R_ind will with...
You may misunderstand what I encountered. I mean no matter how I change the value of ind and cap, S11/S21 always kept the same.
I set L1,2=2.5nH, C1,2=400fF, it is just as the photo I send to you.
I then set L1,2 another value, it is still the same curve.
I am confused now. What do you think...
Dear all,
I schematized a LC tank and connected it with an input PORT0 and output PORT1 and then I do a sp analysis. But no matter how I change the value of L or C, always plots the same S11 and S21 curve.
What's wrong? I just want to extract the sparam of the tank.
Hope someone can help...
Hi, everybody
I read a lecture note saying that, ring oscillators are rarely used in RF system but they are quite oftn in high speed data links. I really don't think RF system and data link can put together to compare with each other.
Could anyone explain the meaning of that for me? What is...
Dear all,
I am a freshman in CDN simulation. When I follow a workshop of Hartley VCO simulation, I didn't get the same result as what the material PPT shows to me. I only convert the model to tsmc.18 as I don't have the example's original model.
I just do as the workshop asks me to. I don't...
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