Patent ID: 7809999
Filing Date: 2010-10-05
Classification: G01R

Abstract:
1. An apparatus for use in obtaining a value from a device, comprising: a first comparator to receive a reference high signal and a device signal, the first comparator providing a first output signal to indicate whether the device signal is above or below the reference high signal; a second comparator to receive a reference low signal and the device signal, the second comparator providing a second output signal to indicate whether the device signal is above or below the reference low signal; and circuitry (i) to adjust at least one of the reference high signal and the reference low signal based on the first output signal and the second output signal, wherein the at least one of the reference high signal and the reference low signal are adjusted to make the reference high signal and the reference low signal converge relative to prior values of the reference high signal and the reference low signal, and (ii) to output the value if a difference between the reference high signal and the reference low signal meets a predetermined criterion, the value being based on the difference.