Variability and ripple analysis of an on-chip all-digital AVS system
(2011) VARI Workshop on CMOS Variability — Location: Grenoble (France) (30.May.2011)
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- Abstract
- Adaptive voltage scaling (AVS) brings energy savings by dynamic adaptation of the operating conditions to process corners and environmental variations. We investigate here the opportunity to use a switched-capacitor converter and a ring oscillator as parts of the AVS unit. The ring oscillator purposes are both monitoring of the circuit delay and generation of its clock signal. We show that jitter induced by the voltage ripple of a switched-capacitor converter is mitigated by averaging effect if the ripple frequency is at least the circuit operating frequency. Simulations on the AVS unit show an efficiency of 70% for the voltage conversion.
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De Vos, J., Flandre, D., & Bol, D. (2011). Variability and ripple analysis of an on-chip all-digital AVS system. VARI Workshop on CMOS Variability, Grenoble (France). https://hdl.handle.net/2078.5/252718