Patent ID: 8125252

Claim:
A signal generator comprising: a delay line configured to delay a first signal applied to an input of the delay line to generate a second signal, and further configured to delay the second signal to generate a third signal; a first tap coupled to the delay line and configured to receive the first signal, the first tap further configured to generate a first to signal based, at least in part, on the first signal; a second tap coupled to the delay line and configured to receive the third signal, the second tap further configured to generate a second tapped signal based, at least in part, on the third signal; a duty cycle distortion tolerance delay element configured to receive the first tapped signal and the second tapped signal, the duty cycle distortion tolerance delay element configured to delay the first and second tapped signals and output delayed first and second tapped signals; and a phase detector configured to receive the delayed first tapped signal, the second signal, and the delayed second tapped signal, the phase detector configured to be enabled responsive to the second signal and when enabled to provide a signal indicative of a phase difference between the delayed first tapped and delayed second tapped signals.