A Clock and Data Recovery PLL for Variable Bit Rate NRZ Data Using Adaptive Phase Frequency Detector(<Special Section>Analog Circuit and Device Technologies)
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概要
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An adaptive 4-state phase-frequency detector (PFD) for clock and data recovery (CDR) PLL of non return to zero (NRZ) data is presented. The PLL achieves false-lock free operation with rapid frequency-capture and wide bit-rate-capture range. The variable bit rate operationis achieved by adaptive delay control of data delay. Circuitry and overall architecture are described in detail. A z-Domain analysis is also presented.
- 2004-06-01
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