Performance Adaptive Voltage Scaling with Performance Tracking Sensor

摘要

Power consumption is reduced by the use of a plurality of parameter reference targets, optimized for a subset of the complete temperature range. The prediction accuracy of the performance tracking sensor is optimized by using small segments of the operating temperature range.

主权项

1. A method of adaptive voltage scaling comprising the steps of:
calibrating performance sensor at a given operating frequency; calibrating the performance sensor at a given die temperature; repeating the calibration steps at a range of temperatures; creating a lookup table containing performance sensor calibration data at the measured temperature ranges; reading die temperature; calibrating performance sensor with calibration data from the lookup table applicable to the measured temperature; reading the performance sensor and adjusting the voltage source if there is a performance error.