udushu
Newbie level 2
Hi all,
I have a design of the Op-Amp based Hartely oscillator that I can't get working. The design is attached to this post.
I have made the simulation as of the oscillator, I believe it should oscillate, since the gain of the Op Amp negative feedback loop is greater than L1/L2 ratio and I estimated the Q as ≈7800. But the oscillations start and die. I can see that the frequency of the decaying oscillations is correct, but they would not sustain.
I event tried to boost the gain up to some unreasonable number, but this doesn't help at all.
Can anyone advise me, what I'm overlooking and how to make this circuit oscillate?
Thanks.
I have a design of the Op-Amp based Hartely oscillator that I can't get working. The design is attached to this post.
I have made the simulation as of the oscillator, I believe it should oscillate, since the gain of the Op Amp negative feedback loop is greater than L1/L2 ratio and I estimated the Q as ≈7800. But the oscillations start and die. I can see that the frequency of the decaying oscillations is correct, but they would not sustain.
I event tried to boost the gain up to some unreasonable number, but this doesn't help at all.
Can anyone advise me, what I'm overlooking and how to make this circuit oscillate?
Thanks.