Patent ID: 7330080
Filing Date: 2008-02-12
Classification: H03K

Abstract:
1. A system comprising: an output driver of an integrated circuit; a first ring oscillator module, wherein said integrated circuit comprises said first ring oscillator module; a first module coupled to said first ring oscillator module for measuring a first oscillation frequency of said first ring oscillator module; a second ring oscillator module; a second module coupled to said second ring oscillator module for measuring a second oscillation frequency of said second ring oscillator module; and a control module operable to receive a measured oscillation frequency from at least one of said first module and said second module, said control module for determining a process corner of said integrated circuit based on at least one of said first oscillation frequency and said second oscillation frequency, said control module integrated within said output driver and for changing impedance of said output driver based on said process corner of said integrated circuit.