Patent ID: 8013646
Filing Date: 2011-09-06
Classification: G01R,H03K,H03L

Abstract:
1. An apparatus comprising: first delay circuitry configured to delay an input signal by a first duration and a second duration concurrently where the first duration and the second duration are adjustable by a first control signal, to provide a pulsed signal having a duration corresponding to a difference between the first duration and the second duration; a comparator configured to compare the duration of the pulsed signal to a reference pulse signal duration to produce a comparison output signal, in response to the comparison output signal, the first delay circuitry changing the duration of the pulsed signal to substantially correspond to the reference pulse signal duration; and second delay circuitry configured to delay the input signal to provide a delayed input signal in response to a second control signal, the first control signal and the second control signal electrically corresponding to each other.