A 2.5 Gb/s CMOS optical transceiver with 10 : 1 serializer using clock generation and delayed data topology

摘要

We propose the optical transceiver having reference clock generator and CDR with delayed data topology in this paper. The 125MHz reference clock of optical transmitter have been extracted from 10 ? 250 Mb/s data arrays. The clock extraction of reference clock generator is achieved by summing the edge information of the each data. Moreover, our optical transmitter includes 2-stacks NMOS serializer scheme rather than 3-stacks conventional scheme to achieve high speed operation. In optical receiver design, we employ a novel CDR with delayed data topology to overcome the problems in conventional CDR such as instability in locking state, nonlinearity output proportional to phase difference, false locking at harmonic frequency. The optical transceiver is designed by using of 0.35μm CMOS technology.