Delay Circuit Design for Differential Detection in Intra-Vehicle Optical Networks

For the realization of fully-autonomous driving systems, intra-vehicle optical networks have been proposed and developed eagerly. In this paper, the latest trends of intra-vehicle optical networks are introduced. In SiPhON, which is one of the intra-vehicle optical networks, to improve the stability of a receiver circuit for the phase-modulation-signal transmission, a delay circuit for the differential detection was designed using the 65-nm CMOS process. From the post-layout-simulation results, the appropriate delay operation at 25 Gb/s was obtained over the range from —40° C to 105° C.