About analysis the Bode plot

Thread Starter

Rohit156

Joined May 18, 2018
8
What can be implications of bode plot in the perspective of oscillator design,
For transfer function s^3/ (s^3+6s^2+5s+1)
As this is reverse gain of 3 stage RC HPF , In bode plot , In the region of very low frequencies ,can certain frequency dominate in oscillation if it working mechanism controlled by non linear system or pole shifting or so ? if not how it can be managed to do so?
Also , in the region of low frequencies , i expected to be act as amplifier ,but it won't happen? why?

for ref.
https://www.wolframalpha.com/input/?i=transfer+function+s^3/+(s^3+6s^2+5s+1)
 

LvW

Joined Jun 13, 2013
1,056
As far as the oscillator is concerned, the most interesting and most important BODE plot is the loop gain (magnitude and phase).
Normally the oscillator (closed loop) has no input - however, if you want, you can use each grounded part of the circuit as an "artificial" input node.
 
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