Synchronization of Ring-based Resonant Standing Wave Oscillators for 3D Clocking Applications
- Additional Document Info
- View All
© 2018 IEEE. Ring-based Resonant Standing Wave Oscillators (RRSWOs) have been shown to be a powerful technique to perform low power clock generation and distribution for high-speed clocks. The resulting clock signals can achieve very high frequencies and exhibit low skew. Utilizing through-silicon-vias (TSVs), a RRSWO can form a 3D ring that distributes this high speed clock to all the die in a 3D IC stack. In this paper, in addition to presenting a RRSWO-based technique to generate and distribute a high frequency, low skew signal in a 3D IC, we also present a scheme to synchronize two such 3D ring-based resonant oscillators without the use of a Phase Locked Loop (PLL). This reduces cost, provides effective synchronization between the 3D ICs, and creates scalable systems with a low clock skew. Finally, we present the design of a robust bootstrap circuit for 3D RRSWOs. We validate out ideas using circuit simulations, including Monte Carlo simulations to quantify the resilience of our approach to variations.
author list (cited authors)
Douglass, A. J., & Khatri, S. P.