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AD808,pdf datasheet (Clock Rec
消耗积分:3 |
格式:rar |
大小:504 |
2009-09-15
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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 that the output phase tracks the input
phase. A patented phase detector has virtually eliminated pattern
jitter throughout the AD808.
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 that the output phase tracks the input
phase. A patented phase detector has virtually eliminated pattern
jitter throughout the AD808.
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