Aug 3, 2007 #1 C chang830 Full Member level 5 Joined Feb 11, 2006 Messages 267 Helped 14 Reputation 28 Reaction score 3 Trophy points 1,298 Activity points 3,424 Hi, We know, in RF IC design,as a rule of thumb in rf circuit design, we need the Fmax value to be at least 10 times as high as the circuit operating frequency. Would anyone pls. tell me why? Thanks
Hi, We know, in RF IC design,as a rule of thumb in rf circuit design, we need the Fmax value to be at least 10 times as high as the circuit operating frequency. Would anyone pls. tell me why? Thanks
Aug 3, 2007 #2 R renwl Advanced Member level 1 Joined Apr 26, 2004 Messages 452 Helped 27 Reputation 54 Reaction score 5 Trophy points 1,298 Location shanghai,china Activity points 1,805 the larger fmax, the better Q
Aug 6, 2007 #3 rfsystem Advanced Member level 3 Joined Feb 25, 2002 Messages 908 Helped 149 Reputation 294 Reaction score 38 Trophy points 1,308 Location Germany Activity points 9,548 For nontuned circuits x10 is a good estimate. For tuned circuits with inductors you can approach x2 but with loss of performance.
For nontuned circuits x10 is a good estimate. For tuned circuits with inductors you can approach x2 but with loss of performance.
Aug 7, 2007 #4 C cswang Junior Member level 3 Joined May 31, 2001 Messages 31 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,286 Activity points 158 maximum avalible gain is more important than ft in really high frequency RF design(such as 60GHz)