时钟与数据恢复电路CDR CDR CDR CDR (CDR)CDR 1 ( CDR b1 b2 b3..bn) n x ft ( (BER) Reed-Solomon EMI 8B10B CDR ) ft n ft CDR (FEC)FR-4 CDR CDR ( )CDR BER / ( CDR SerDes )TRANSMITTERCHANNELRECEIVERbnDESERIALIZERSERIALIZERb1 b2 b3 b4b1 b2 b3 b4bn1.8PD VREFLPFVCO1/n VCO 12 DECPLL1/n2.PLL/) VCO LPF VCO 3 / CDR (PD) (VCO) PD (1/n) VREF PLL (n) VREF VCO / ±50ppm ±50ppm ±50ppm ( VCO ) VCXO CDR LPF (PLL) 2 1 PLL PLL (VCXO)(FR-4-(LPF) VCOSONET ( 3 3E 4) PLL CDR PLL 3 PLL (DEC) / LPF-PLL VCXO)VCO (DECDATAoutCLK/DATAinPDLPFVCOCLKrec3.PLLCDR9/ )CDRCDR ( ( CDR VCXO VCXO 24(LOS) (V REF) ±4.6ppm)/VCO/VCXO 4 VCO/VCXO/ / TCXO 10MHz 10GHz GSM OC- 192 CDRVCO VCOVCXO VCO VCXO / /DECDATAoutCLK/DATAinPDVCOCLKrecLOCK……
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