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Subject: Re: How to recover clock from Manchester Encoded Data?

Date: 07/25/03 at 11:34 PM
Posted by: Peter Keh
E-mail: peterkeh151@yahoo.com
Message Posted:

In Reply to: Re: How to recover clock from Manchester Encoded Data? posted by Russ Kincaid on 07/04/03 at 1:14 PM:

Hi,
I managed to get the digital-PLL(MM74HC4046) working using phase comparator 2 of the chip. However, I noticed that the VCO output frequency is not "fixed". When I feed the Manchester encoded data into the input pin, the VCO frequency slows down at some point and start picking up speed again later. Like this:

_|_|_|__|__|__|_|_|_|_
If I use this to drive a D-latch, I can't recover the the NRZ waveform. Any suggestions?
Thanks a lot.


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