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pll_explanation

pll_explanation - BULDING THE SYSTEM The first step is to...

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Unformatted text preview: BULDING THE SYSTEM The first step is to build the VCO block by itself and verify its operation: 45V VCTL VCO WCLK FER: = fl. + («CO Van d W W n “ mm a F HITH Val-TO W Van Next build the PFD: mwrurm were guess: 23m! I m ITS CUTPUT ASSERTED MORE FINALLY: THE LOOP FILTER Build the loop filter: LOOP FILTER mmvz w ‘u’ 2-5" PLL This is the most complicated of the three optional labs - but is definitely the coolest system and if you can get it working, you should be able to learn a lot. The top level block diagram of the PLL is shown below: BASIC VCo \bLTfiGE-m PHASE-l FREQ” EN“ gnaw DETECTOR L000 PFD Fuse VCO l FM TRANSMISSION SAME AS v'“ ° Page Divlmsn D Q VIN E's—t PLL This is the most complicated of the three optional labs - but is definitely the molest system and if you can get it working, you should be able to learn a lot. \ The top level block diagram of the PLL is shown below: BASIC VCO PFD 9‘:sz W0 vcoaK/n VCOCLK mm ...
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