Signal-alignment circuitry and methods

摘要

Signal-alignment circuitry, comprising: phase-rotation circuitry connected to receive one or more input clock signals and operable to generate therefrom one or more output clock signals; and control circuitry operable to control the amount of phase rotation applied by the phase-rotation circuitry to carry out a plurality of alignment operations, the alignment operations comprising: one or more first operations each comprising rotating one or more of said output clock signals relative to one or more of the other said output clock signals, so as to bring a phase relationship between said output clock signals, or derived clock signals derived therefrom, towards or into a given phase relationship; and one or more second operations each comprising rotating all of said output clock signals together, so as to bring a phase relationship between said output or derived clock signals and said input clock signals or an external-reference signal towards or into a given phase relationship.