User talk:Paul B isle of wight

There seems to be much confusion about the Leeson eq. It is very common to see Ps stated as being osc. output power as it has been on wikipedia. There is no question to someone who has worked with such circuits that what Leeson originally said Ps = amplifier input power is correct. This is known in the technical literature but it is not always shown in engineering terms. Professor Enrico Rubiola shows that phase noise depends on the added noise of the sustaining amplifier, what he shows in a different form corresponds with the Leeson Equation where Ps is available power at amplifier input, and F is the amplifier noise Factor measured at operating power level.

If you think intuitively about a feedback oscillator where the output power is unconnected with the power fed back through the resonator the the input, it can be seen that there is no reason why the phase noise should depend on the output power.

I have shown a link to my derivation of the Leeson equation so people can see proof that this is correct. And also see experimental evidence.

The oscillator out put power is only significant in relation to the second stage noise figure. --Paul B isle of wight (talk) 21:46, 20 March 2019 (UTC)