Hi all,
Could someone explain the attached circuit for me? This is what I know or believe to know: It is an LC oscillator, which gets excited by noise and creates a sine wave at the output of the op-amp. The op-amp gives positive feedback and amplifies the oscillations, making sure they won't die out. Also the diode part is to counter clipping of the signal. But how does this positive feedback exactly work? What is the gain of this circuit and how do I calculate it. Why does the clipping happen and how does this diode bridge exactly prevent this? And what is the exact function of the resistances R1 to R3?
Could someone explain the attached circuit for me? This is what I know or believe to know: It is an LC oscillator, which gets excited by noise and creates a sine wave at the output of the op-amp. The op-amp gives positive feedback and amplifies the oscillations, making sure they won't die out. Also the diode part is to counter clipping of the signal. But how does this positive feedback exactly work? What is the gain of this circuit and how do I calculate it. Why does the clipping happen and how does this diode bridge exactly prevent this? And what is the exact function of the resistances R1 to R3?
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