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Through theoretical deduction, two new explanations of Leeson model are presented: the corner frequency of high Q oscillators in the phase noise curve should be the frequency at the intersection of the f 0 curve segment after adding 3 dB and the f −1 curve segment; f0/2QL of low Q oscillators in the phase noise curve should also be the frequency at the intersection of the f 0 curve segment after adding...
A general pierce circuit and an 80 MHz 5th SC-cut Um-1 resistance welding crystal resonator are chosen to accomplish the 80 MHz low phase noise crystal oscillator in this paper. In the process, the software-Serenade8.7 is used to guide the design and optimization. Agilent 5052B is also used to measure the phase noise of this experimental sample. The measured phase noise of the prototype 80 MHz crystal...
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