pinhead
Newbie level 3
My work on CMOS LC-VCO design has problem, with its phase noise measurement.
Using Agilent E5052A signal source analyzer, I observe the unknwon noise source about 1/f^3, 1/f^2 frequency range.
The curve has never found (30dB, 20dB decrease), and phase noise trace is almost flat until 1MHz offset.
The measurement results are quite different from simulation results.
Did I mistake the measurement?
Do you give me any advice for this mistake?
Using Agilent E5052A signal source analyzer, I observe the unknwon noise source about 1/f^3, 1/f^2 frequency range.
The curve has never found (30dB, 20dB decrease), and phase noise trace is almost flat until 1MHz offset.
The measurement results are quite different from simulation results.
Did I mistake the measurement?
Do you give me any advice for this mistake?