Avago Technologies International Sales Pte. Limited

Angus Tang

Seong-Ho Lee

Wei Zhang

Hyung-Joon Jeon

Vadim Milirud

SangHye Chung

An apparatus includes control logic coupled to a phase detector circuit and an adjustable delay circuit. The control logic is configured to obtain a state of a first phase of an output signal of a phase interpolator relative to a second phase of a reference signal, and adjust a delay of the reference signal until the second phase matches the first phase. The control logic is further configured to measure a total delay of the reference signal when the second phase matches the first phase, and determine integral non-linearity of the phase interpolator at the first code based on the total delay. The control logic may further calibrate a first code of a phase interpolator based, at least in part, on the integral non-linearity.

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Mission Viejo, CA, United States of America

Angus Tang