US 7,120,838 B2 · Method and unit for deskewing signals

Abstract

A clock deskew method includes receiving a data signal and a clock signal, processing the data signal to generate a jitter characterization parameter, shifting the clock signal by about 90° from the jitter characterization parameter to generate a sampling clock signal, and sampling the data signal with the sampling clock signal to generate a deskewed data signal. A clock deskew unit includes a clock unit, a sampling unit, and a deskew unit. The deskew unit includes a jitter characterization unit that generates a jitter characterization parameter. The jitter characterization parameter establishes a phase location for aligning a clock signal. Shifting the clock signal by about 90° from the phase location of the jitter characterization parameter provides a location for sampling a data signal to generate a deskewed data signal.

Claims20

Dependent claims

A clock deskew unit comprising:

a clock unit to receive a clock signal and a phase control signal and generate a sampling clock signal;
a sampling unit coupled to the clock unit, the sampling unit to receive a data signal and the sampling clock signal and generate a sampled data signal;
a deskew control unit including a jitter characterization unit and a phase control unit, the deskew control unit coupled to the sampling unit and to the clock unit, the deskew control unit to receive the sampled data signal and generate the phase control signal;
and
wherein the phase control signal includes a jitter characterization parameter and a calculated delay parameter to adjust the sampling clock.

2 more elements

Dependencies are inferred from the claim text.

Method and unit for deskewing signals

Life of this patent

Method and unit for deskewing signals

Life of this patent

Abstract

Claims20