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PSoC™ Creator & Designer

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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3 Replies
Anonymous
Not applicable
        This is wave form   
When sweep phase-offset from -120deg to +120deg   
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Bob_Marlowe
Expert II

There are some videos about "Synchronous Detection" in the library, just search for the words and look at parts 1 to 4. Probably that technique can help you with your project. When you send a mail to Chris Keeser or Dave van Ess you can ask for the complete project files.

   

 

   

Bob

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Anonymous
Not applicable
        Bob-san, Thanks for nice follows.   
I didn't see all of cypress video,   
The words, "Synchronous Detection" is first time to heard.   
I will be watch it as soon.   
   
Anyway, I'm not so serious to about this module.   
Because, this too much consume UDBs.   
There is no practical to real use.   
It's just to know what's PSoC can do.   
Thank you   
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