INTEGRATED CIRCUIT DYNAMIC DE-AGING

摘要

An integrated circuit dynamically compensates for circuit aging by measuring the aging with an aging sensor. The aging sensor uses the same circuit to measure circuit speeds in both aged and un-aged conditions. An example aging sensor includes two delay lines. The delay lines are controlled to be in a static aging state or the delay lines are coupled to form a ring oscillator that can operate in an aged state where the frequency is slowed by aging or in an un-aged state where the frequency is not slowed by aging. The integrated circuit uses the aging measurements for dynamic voltage and frequency scaling. The dynamic voltage and frequency scaling uses a table of operating frequencies and corresponding voltage that is periodically updated based on the aging measurements. The integrated circuit use information about the relationship between the aging measurements and circuit performance to update the table.