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A multifunctional bridge function unit (BRG) and buffer function unit were developed for the OLT LSI for the coexistence of 10G-EPON and GE-PON and implemented in 40-nm CMOS. The units comply with the 10G-EPON standard. The BRG features a high-speed search engine, dual-rate data processing, a low-latency datapath architecture, and a VLAN function. The MAC address search engine enables 22-Gb/s and...