Patent ID: 8022684
Filing Date: 2011-09-20
Classification: G05F

Abstract:
1. A method of controlling a supply voltage that is applied to core logic in an integrated circuit comprising: providing an external voltage regulator that generates said supply voltage in response to a regulator reference voltage that is applied to a reference voltage input on said external voltage regulator; generating a bandgap reference current; applying said bandgap reference current to a variable resistor to produce said regulator reference voltage; applying said regulator reference voltage to said reference voltage input on said external voltage regulator; generating said supply voltage in said external regulator; applying said supply voltage to said core logic; determining operating parameters of said core logic using an adaptive voltage scaling and optimization circuit; generating a voltage control signal in said adaptive voltage scaling and optimization circuit based upon said operating parameters of said core logic; applying said voltage control signal to said variable resistor to adjust resistance of said variable resistor to adjust said regulator reference voltage.