buddypoor
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James, I am really sorry, but I cannot answer your question. The reason is that a circuit will probably oscillate at the designed frequency if (and only if) both conditions (a) and (b) – as mentioned earlier – are fulfilled. More than that, at the beginning of the whole process condition (a) must be “over-fulfilled” in order to safely start oscillations.
Since both conditions are determined by the whole circuit – especially by the frequency dependent part of the circuitry – one cannot specify resp. evaluate one single component (in your case: neg. resistance) without knowing the behaviour of the rest of the circuit. In this context, especially the phase relationships are very important and, therefore, my question if the neg. resistance circuit contributes to the phase of the whole network.
Did you try circuit simulation already ? “Linear” oscillators are probably the most “suspicious/malicious” circuits in analog electronics and many textbooks are in this context afraid of exact explanations. Regards Lutz
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