rfmems wrote on May 13th, 2009, 7:49am:I guess lots of people in this forum disagree with you.
Actually, I think nowadays most of the industries and academies using spectreRF for analog/rf designs.
Are you student or any relation with Cadence ?
I think almost all people except for a few people in this forum are students.
I think you just started to use SpectreRF since two or three years ago.
Did you resolve the following ?
http://www.designers-guide.org/Forum/YaBB.pl?num=1207830622rfmems wrote on May 13th, 2009, 7:49am:And most of the designers measure their critical block (if not the whole chip) themselves!
No.
In old days, designers, especially RF designers were engaged in all tasks.
But
nowadays, in most companies, works required for making IC are divided into small tasks.
architectual design, circuit simulation, physical layout design, verification, building block measurements, system evaluation, etc.
Nowadays, designers are engaged in limited tasks in most companies.
Indeed there is no stage for measurement/evaluation and even no feedback path from measurement in design flow of Cadence Top Down Methodology.
rfmems wrote on May 13th, 2009, 7:54am:I did not say "Lorentzian Power Spectrum" including f^-3 region, I said you can see both Lorentzian and f^-3 region.
Maybe you just mean some spectrum which have flat top in very small offset region.
Such flat top spectrum is natural result of actual non-linear effects.