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I am using general averaged switch model, which is in the book " Fundamental of power electronics" , and write veriloga model to substitute the buck switch network, and do AC analysis, but found it is difficult to establish the DC operating point. I am still researching.
I want to plot the open loop gain dB20 and phase curve of a DC/DC converter using PAC analysis, but how to break the circuit and add PAC source?
You cannot insert a L-C filter to isolate AC signal and pass DC signal, because the PSS analysis need to do transient analysis first, if you insert...
If you are designing a DC/DC converter, you must have a clock frequency more than 1MHz, so the simulation time becomes very long.
Is there any good ways to shorten the simulation time?
What kind of guard ring do you mean? If it is only used to avoid latch up, i think there is no special rule for the width, because it is just a pick up function. If it is also used as the current path of ESD, it should be as wide as possible.
I also think IC system engineer is a valuable job, just like the commander in a battle, he needs to analyze the situation of both enemy and our own and make decision. 孙子兵法里有句话“知己知彼，百战不殆”
Can i use Miller effect to generate a very big effective capacitor, so that i can use it form a low pass filter with very low cut off frequency? See the attached pic.
thanks.
dedalus:
yes, i also worked out this expression, but the problem is when design a compensation network, you should know the effect induced by R2 and C2, that is to say, estimate the position of p1 and p2. However, from the expression , we can hardly find the relationship between R1,R2, C1 C2 and...
Please see attached picture, I know the expression of z1, but what is the expression of p1 and p2? I found it's complicated, any one know how to estimate the position of p1 and p2?
Thanks.
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Re: an interview question
The left one can generate a very long trise or tfall by setting Vbp or Vbn to limit the current.
For the right one, if Vbp is very high or Vbn is very low, it will act the same as the left one, however, if Vbp is low enough or Vbn is high enough , it can generate a...
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