A MDLL-based Multi-Phase Clock Multiplier

Abstract

A multiplying delay-locked loop (MDLL)-hased multiphase clock multiplier is presented. The proposed clock multiplier provides 8-phase output clocks and achieves a frequency range of 0.6-1.0 GHz with programmable fractional multiplication ratios of N/M, where N = 4, 5, 8, 10 and M = 1, 2, 3. The proposed clock multiplier is implemented in a 65 nm CMOS process and occupies an active area of 0.01 mm(2). It achieves an effective peak-to-peak jitter of 5 ps and dissipates 3.4 mW from a 1.0 V supply at 1 GHz.