PLL L1:NTF
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2011-6-26 12:32
Knowing NTF is the fund. thing of designing plls.
It's a lowpass system. The input is high qulity XO/DCXO/TCXO clock source with very lower noise property. Pll tends to do clock multiplier by a number of N.
For ex, Vref=40M, fout=5G, the N=125.