Hello again,
Steve:
I agree that a way to make sure the Barkhausen criterion is met first is desired.
ALL:
The new circuit is almost the same as the old circuit with different values so the pole pair criterion can still be calculated the same way just with different resistor numbers:
z=C1*R5*R1-C2*R6*R1+C2*R5*R2
and again z shows us where the pole pair is relatively:
z=0, on the jw axis,
z<0, in the RHP and so will saturate eventually,
z>0, in the LHP and so will damp to zero eventually.
For this new circuit, z=0.03975 so the pole pair is in the LHP which means the oscillations get damped out. We can calculate how long it takes to damp them out if needed.
Steve:
I agree that a way to make sure the Barkhausen criterion is met first is desired.
ALL:
The new circuit is almost the same as the old circuit with different values so the pole pair criterion can still be calculated the same way just with different resistor numbers:
z=C1*R5*R1-C2*R6*R1+C2*R5*R2
and again z shows us where the pole pair is relatively:
z=0, on the jw axis,
z<0, in the RHP and so will saturate eventually,
z>0, in the LHP and so will damp to zero eventually.
For this new circuit, z=0.03975 so the pole pair is in the LHP which means the oscillations get damped out. We can calculate how long it takes to damp them out if needed.
Last edited: