Patent ID: 7378833
Filing Date: 2008-05-27
Classification: G01R

Abstract:
1. An apparatus comprising: a first delay to receive a generated pulse to produce a first delayed pulse, the first delay to delay the generated pulse for an amount of time at least partially dependent on a supply voltage to produce the first delayed pulse; a second delay to receive the generated pulse when the first delay receives the generated pulse, the second delay to delay the generated pulse for a controllable amount of time to generate a second delayed pulse; a comparator to indicate which of the first and second delayed pulses arrives first at the comparator and to provide an indication thereof; and a counter to count the indication, wherein multiple pulses are to be generated for different controllable amounts of second delay time, the counter to provide a count of the indication for each amount of second delay time to a controller, the controller to determine probabilities that the first delay is in an interval of two second delay values for the different amounts of second delay time.