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DescriptionQ642
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Q642DesignArchAMDASIC interview problem

Separate CDR Frequency Acquisition from Phase Tracking

TechniquesDesignArchClockingSerDes
DifficultyMedium
TopicTiming
LanguageSystemVerilog
Format4 choices
01

Problem

A binary-NRZ receiver uses a phase detector, loop filter, and phase interpolator. A local reference clock is available during startup, but the recovered sampling phase must follow the incoming serial data. The data can contain short runs without transitions. Which description of lock and tracking is correct?

02

Answer choices (4)