A 1.2GHz delayed clock generator for high-speed microprocessors

A 1.2GHz delayed 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 delayed clock generator tile in 0.13 um CMOS technology occupies only 0.004 mm and operates at variable input frequencies ranging from 625 MHz to 1.2GHz.