How about Phase Comparator

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Anonymous
Not applicable

     

            

   

Hello Friends     

   

This time, I am starting the work of Phase Comparator     

   

It is very just an experimental design.     

   

     

            

   

What is use it for?     

   

Phase detector for PLL     

   

Frequency comparator for FLL     

   

Clock synchronization     

   

     

            

   

With my DDS ...     

   

Vector Voltage Measurement     

   

Automatic Universal Bridge     

   

Tuning machine for musical instruments ?      

   

      

   

Theory of operation     

   

     

            

   

              PhDet1.JPG            

   

This logic come from 4046 type TTL, PLL device.     

   

That TTL has 3 type phase detectors.     

   

PC1 is exclucive-or method     

   

PC2 is edge detected method     

   

PC3 is RS-flip-flop method     

   

Each has each characteristic.     

   

     

            

   

PC2 has a feature different with others.     

   

It have wide lock-in range and available to     

   

frequency detection not only phase-range.     

   

     

            

   

              PhDet2.JPG            

   

     

            

   

This is quite getting started now,     

   

Has many unstable behavior still     

   

I'm not certain that can use at actually.     

   

     

            

   

Thank you     

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