holddreams said:
Simulating a crystal oscillator can be a frustrating task.
The higher the Q(originally the quality factor),the longer it takes for the oscillation to build up.
If you want to measure the frequency accurately,you need to do this in very fine steps.
The time need to build up oscillation equals Q*T,where Q is the quality factor=2*pi*f*L1/R1, and T is the period of the XTAL,f is the frequency of the XTAL.
The parameters R1 and L1 are given in crystal model.
So before simulating the XTAL,you can calculte the time for oscillation.
Hi, holddreams,
Do you means,startup time=Q*T=2*pi*(f*T)*L1/R1=2*pi*L1/R1?
that is the startup time only related to crystal?
Does the startup time depend on Gm of amplifier?
It seems startup time strongly depends on amplifier!