Page 266 - Complete Wireless Design
P. 266
Frequency Synthesizer Design
Frequency Synthesizer Design 265
Figure 5.8 Spectra showing phase noise out of PLL.
Figure 5.9 Spectra showing reference spurs out of PLL.
occur at harmonics of the reference frequency, and can be created by charge
pump leakage and mismatch, PCB cross talk, improper decoupling of DC
power into the PLL, and exterior noise and signal source ingress.
If the PLL circuit will not lock reliably, or has generally all-around inferior
performance:
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