Method and apparatus for measuring and compensating for...

Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By phase

Reexamination Certificate

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C327S003000, C327S007000

Reexamination Certificate

active

07821301

ABSTRACT:
A method and circuit for static phase error measurement includes a reference clock delay chain having a selectable number of delay elements. A number of the delay elements are enabled in accordance with a select length signal to delay a reference clock signal. A feedback signal delay chain also has a selectable number of delay elements. A number of the delay elements are enabled in accordance with a select length signal to delay a feedback signal. A latch tests phase alignment between the delayed reference clock signal and the delayed feedback signal and outputs a measurement of static phase error.

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