Phase interpolator having a phase jump

Details Phase interpolator having a phase jump Phase interpolator having a phase jump

2004-12-22

2010-12-07

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

C375S371000, C375S226000, C375S375000, C708S290000, C708S313000, C327S158000, C327S161000, C327S156000, C327S159000, C327S160000, C327S162000, C327S149000, C327S150000, C327S153000

Reexamination Certificate

active

07848473

ABSTRACT:
A method and apparatus are disclosed for generating phase controlled data, based on a roaming tap interpolator. The present invention recognizes that roaming tap interpolators have inherent nonlinearities and discontinuities at the boundaries of each interpolation region. A roaming tap interpolator is disclosed that shifts the interpolation curve in time in order to avoid the undesired artifacts in the interpolation curve. A roaming tap interpolator generally comprises a plurality of delay elements that delays a first signal to generate a plurality of interpolation regions each having an associated phase; a multiplexer to select one or more of the interpolation regions; and an interpolator to process the selected one or more of the interpolation regions to generate a second signal. In addition, according to the present invention, the roaming tap interpolator includes a delay unit that selectively delays one or more of the first signal and the second signal to generate an interpolation signal, the interpolation signal selectively having a first phase or a second phase.

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