Sub-picosecond jitter SiGeBiCMOS transmit and receive PLLs for 12.5Gbaud serial data communication

Fully integrated SiGe BiCMOS transmit and receive PLLs for 8B/10B coded 10Gb/s serial links operate with excellent jitter characteristics. The transmit PLL (TxPLL) provides a 12.5GHz clock with 0.4ps rms jitter synthesized from a similar to 195.3MHz reference. The receive PLL (RxPLL), which exhibits <0.56ps rms jitter generation, extracts a full rate clock and recovers data from a 12.5Gb/s input bit stream. The RxPLL operates error-free when tested with a 14km optical link test bench. The power consumption of the TxPLL and RxPLL cores at 3.3V are 270mW and 330mW, respectively.