Accurate PLL Characterization Using Virtuoso Spectre RF Noise ...

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Experimental Results using Cadence RFkit database
The test circuit used was a N-Integer 2.4 GHz PLL including a PFD,
charge pump, VCO and divider available in Cadence RFKit ([8], [9]).
Using Cadence SpectreRF PLL flow (versions IC5141/MMSIM611),
the phase noise was extracted for the PFD and VCO blocks to
generate a phase-domain model for the entire PLL.
The closed-loop PLL behavior is then simulated using Spectre
TRAN analysis and compared with transistor level simulation.
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September 17, 2007
Results generated on an IBM MPRO Linux 64 bits OS.
Additional metrics (Injection Pulling, power supply rejection) are
directly evaluated