newmedia
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Amherst
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Re: What is basic assuption?
Reply #1 - Mar 9th, 2004, 6:04am
Hello, everyone.
I checked this forum this morning, and I saw someone, I forgot his username, wrote a reply and then I realized he removed it. He asked me that do I have experience at SpectreRF, and recommend read “Simulating switched-capacitor filters with SpectreRF” paper.
I’m digital circuit guy, so I usually used Spectre not SpectreRF, but I read the paper, “SpectreRF tutorial” from cadence about one month ago.
I also checked “Simulating switched-capacitor filters with SpectreRF”. In that paper, Ken mentioned about back annotation functionality, it can be good solution. During iterative design process, back annotation can be good solution.
Let me summarize my conclusion. 1. Design PLL. At this time, use assumption about parasitic effect. 2. Do pre-layout simulation 3. Layout PLL 4. Back annotation 5. Do post-layout simulation 6. Modify layout 7. Iterate 4,5,6 until you are satisfied with the result.
Am I right?
j.j.
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