Team member: Saman Saeedi, Mayank Raj

Data center networks rarely operate at full utilization. Energy proportional data centers can achieve significant power savings by reducing power consumption at lower data-rates or when idle. To illustrate this idea, we present an energy proportional source-synchronous 4-channel WDM-based parallel optical receiver is presented. Adaptive body biasing is incorporated in the same front-end architecture maintain a constant energy-per-bit consumption. Quadrature ILO-based clocking is employed for synchronization and a novel frequency-tracking method that exploits the dynamics of IL in a quadrature ring oscillator to increase the effective locking range. The prototype measurements indicate a record-low power consumption of 153fJ/b at 32Gb/s.

Related Publications

M. Raj, S. Saeedi, A. Emami, “A 4-to-11GHz Injection-Locked Quarter-Rate Clocking for an Adaptive 153fJ/b Optical Receiver in 28nm FDSOI CMOS“, IEEE International Solid-State Circuits Conference (ISSCC), Feb. 2015, DOI: 10.1109/ISSCC.2015.7063097

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M. Raj, S. Saeedi, A. Emami, “A 4-to-11GHz Injection-Locked Quarter-Rate Clocking for an Adaptive 153fJ/b Optical Receiver in 28nm FDSOI CMOS“, IEEE International Solid-State Circuits Conference (ISSCC), Feb. 2015, DOI: 10.1109/ISSCC.2015.7063097

[ PDF ]