neoflash
Advanced Member level 1
In document from designer's guide, it is stated that there is a relationship between
SΦ(f) and L(f): SΦ(f)=2*L(f):
L(f) is Leeson function;
SΦ(f) is phase noise spectrum;
However, Hajimiri's paper on Phase noise in Ring Oscillator stated that SΦ(f)=L(f). Which one is real?
How we get L(f) function? Direct measuring from PLL output by spectrum analyzer?
Added after 29 minutes:
Here is the doc from that website.
SΦ(f) and L(f): SΦ(f)=2*L(f):
L(f) is Leeson function;
SΦ(f) is phase noise spectrum;
However, Hajimiri's paper on Phase noise in Ring Oscillator stated that SΦ(f)=L(f). Which one is real?
How we get L(f) function? Direct measuring from PLL output by spectrum analyzer?
Added after 29 minutes:
Here is the doc from that website.