Active GHz clock network using distributed PLLs

Abstract
A novel clock network composed of multiple synchronized phase-locked loops is analyzed, implemented, and tested. Undesirable large-signal stable (mode-locked) states dictate the transfer characteristic of the phase detectors; a matrix formulation of the linearized system allows direct calculation of system poles for any desired oscillator configuration. A 16-oscillator 1.3-GHz distributed clock network in 0.35-/spl mu/m CMOS is presented here.

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