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Design >> RF Design >> phase noise -30db/decade upto 100M
https://designers-guide.org/forum/YaBB.pl?num=1379565904

Message started by love_analog on Sep 18^th, 2013, 9:45pm

Title: phase noise -30db/decade upto 100M
Post by love_analog on Sep 18^th, 2013, 9:45pm

I have a ring oscillator running at 3G. When I do phase noise plot it shows -30db/decade upto 100Meg. In typical LC oscillators that I designed a while ago, I used to see the transistion from 30db/decade at 1Meg.
Is this normal? What can I do to prevent it going that high.
-80dbc/Hz @1Meg
-110dbc/Hz @10MEg
-140 @ 100Meg
-160 @1G