Presentation
PASCAL: ML-Based Predictive Skew Compensation for Asymmetric Clock Tree Aging
DescriptionAsymmetric transistor aging is becoming increasingly significant in advanced process nodes due to rising thermal density and spatial workload variations. Clock distribution networks are particularly susceptible, as non-uniform aging across clock branches can distort clock skew and lead to setup or hold timing violations. This paper presents PASCAL, a Predictive Aging Skew Compensation Architecture for cLock trees. PASCAL integrates programmable delay lines within clock branches and an ML-based predictive maintenance controller that monitors temperature gradients and clock-gate activity to estimate aging-induced skew degradation. The controller dynamically tunes programmable skew to compensate asymmetric aging. Aging-aware simulations in a 16 nm FinFET process show that PASCAL eliminates over 95% of timing violations while maintaining timing margins over a 10-year lifetime.
Event Type
Work in Progress
TimeMonday, July 275:49pm - 5:50pm PDT
LocationExhibit Hall