osc wrote on Oct 6th, 2009, 8:31am:Hi
I am planning to design an oscillator with Analog amplitude control loop. The problem I face is that this loop by nature is very non-linear and difficult to check for stability. Stability problems lead to a phenomenon called squegging.
Can some one help with the simulation/analysis of such a loop.
Thanks :)
There are some remarks to be made to your posting:
1.) There are several different alternatives for amplitude control - and before analyzing such a loop your choice has to be made. Try to become familiar with these options (literature study).
2.) The loop must NOT be "very" non-linear. In contrary, it should be as linear as possible and as non-linear as necessary to do the job.
3.) Squegging is not a stability problem, but the normal behaviour of each control loop - as the result of the error signal which swings around a certain middle value.
4.) Question: Do you have chosen already the type of oscillator circuit?