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Oscillator:  Phase noise Vs Amplitude noise

Question asked by santosh_iitd on Dec 5, 2019

For Electronics Oscillator Among, Phase noise and Amplitude noise, which noise level is greater when measure practically and theoretically for the following conditions:

1) If input signal amplitude is perturbed (by noise) and kept phase constant throughout time

               A(t) * COS(2*pi*f*t+phi)


2) If input signal amplitude is constant throughout time and phase is perturbed (by noise)

               A * COS(2*pi*f*t+phi(t))


Consider any measurement system which is appropriate to measure both amplitude and phase noise


3) when Amplitude is perturbed at any time can phase noise is less compare to amplitude noise ?  or in other words

can Phase be affected by amplitude perturbation?