Title :
Supply-noise resilient adaptive clocking for battery-powered aerial microrobotic System-on-Chip in 40nm CMOS
Author :
Xuan Zhang ; Tao Tong ; Brooks, David ; Gu-Yeon Wei
Author_Institution :
Harvard Univ., Cambridge, MA, USA
Abstract :
A battery-powered aerial microrobotic System-on-Chip (SoC) has stringent weight and power budgets, which requires fully-integrated solutions for both clock generation and voltage regulation. Supply-noise resilience is important yet challenging for such SoC systems due to a non-constant battery discharge profile and load current variability. This paper proposes an adaptive-frequency clocking scheme that can tolerate supply noise and improve performance when implemented with an integrated voltage regulator (IVR). Measurements from a `brain´ SoC, implemented in 40nm CMOS, demonstrate 2× performance improvement with adaptive-frequency clocking over conventional fixed-frequency clocking. Combining adaptive-frequency clocking with open-loop IVR extends error-free operation to a wider battery voltage range (2.8 to 3.8V) with higher average performance.
Keywords :
CMOS integrated circuits; integrated circuit noise; microrobots; switched capacitor networks; system-on-chip; voltage regulators; CMOS technology; SoC systems; adaptive-frequency clocking scheme; battery-powered aerial microrobotic system-on-chip; integrated voltage regulator; open-loop IVR; size 40 nm; supply-noise resilient adaptive clocking; system-on-chip; voltage 2.8 V to 3.8 V; Batteries; Clocks; Delays; Frequency measurement; System-on-chip; Voltage control; Voltage measurement;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2013 IEEE
Conference_Location :
San Jose, CA
DOI :
10.1109/CICC.2013.6658436
