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PLL- Not locking due to dont know the reason

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Ayyanar M

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Hi,

see the attached waveform and tell why its not locking?

(Voltage to the VCO oscillation is more than 1mV )
 

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Hi,

unless this is some kind of exam question. It would preferable if you put up your circuit schematic. Nevertheless, Guidelines should provide you the required information regarding your feedback loop design to debug.
 

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