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AD808

Part Number	AD808
Manufacturer	Analog Devices
Description	Fiber Optic Receiver with Quantizer and Clock Recovery and Data Retiming
Published	Mar 23, 2005
Detailed Description	a Fiber Optic Receiver with Quantizer and Clock Recovery and Data Retiming AD808 frequency acquisition without false lo...
Datasheet	AD808 PDF File

Overview

a Fiber Optic Receiver with Quantizer and Clock Recovery and Data Retiming AD808 frequency acquisition without false lock.
This eliminates a reliance on external components such as a crystal or a SAW filter, to aid frequency acquisition.
The AD808 acquires frequency and phase lock on input data using two control loops that work without requiring external control.
The frequency acquisition control loop initially acquires the frequency of the input data, acquiring frequency lock on random or scrambled data without the need for a preamble.
At frequency lock, the frequency error is zero and the frequency detector has no further effect.
The phase acquisition control loop then works to ensure tha...

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