A 0.004mm/sup 2/ Portable Multiphase Clock Generator Tile for 1.2GHz RISC Microprocessor

A portable multiphase clock generator capable of adjusting its clock phase according to input clock frequencies has been developed. It consists of a full-digital CMOS circuit that leads to a simple, robust, and portable IP. One-cycle lock time enables clock-on-demand circuit structures. The implemented low power clock generator tile occupies only 0.004mm 2 and operates at variable input frequencies ranging from 625MHz to 1.2GHz