Hi Andrew,
The phase-noise simulation results obtained using pss+pnoise analysis is found to be around 10dB lower at various offsets than that obtained from transient noise analysis. The nominal frequency of the oscillator is around 350kHz. The simulation results are attached. What could be the issue here?
In the below, the green curve shows the pss+pnoise simulation results, while the red one shows the results obtained from transient noise. The PN() function uses a windowSize=32768 for the below results.
The below shows a comparison similar to the above, the only difference being the window size=52488
The settings of the transient analysis are as below:
The function PN() is set up as below:
The simulation is setup to run for a time of 5s so as the large window size can be used.
Thanks.