CataM
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I am trying to re-draw this Wien Bridge Oscillator to find out the open loop gain and the feedback "β" but I do not see how. I am unable to see which is the open loop gain "A" and the feedback network.
How would it be drawn regarding the general feedback scheme:
A Wien bridge oscillator usually uses capacitors, not inductors.
Open loop gain is not used for any of the calculations because at low frequencies the gain of an opamp is almost infinity, the closed loop gain is slightly more than 3.
I forgot to mention that my last post (β=1/3) applies to the oscillation frequency only.
In general, the feedback factor is frequency-dependent (RC-bandpass function).
"ol" refers to open loop?Of course ß and ß*Aol can be calculated for the original RL circuit as well, using elementary AC network theory.
Using a Wien Bridge Oscillator, it is possible to set a oscillating frequency more than 300 kHz ? Or in what range of oscillating frequencies could be used a Wien Bridge ?
To get big oscillating frequencies should I use another type of capacitors (MICA for example ? ) or it just works with simple ceramic cap's ?