In this paper

based on an analysis of the effects of static phase errors on delay-locked loop (DLL)

a novel high-resolution phase detector (PD) in use for a 30-phase 500MHz DLL

is proposed.It incorporates the feature of the Hogge PD with the feature of the Alexander PD.Compared with conventional linear and binary PDs

the proposed PD not only has advantages of a perfect linear PD

but also solves the problem of dead zone in course of charge pump’s switch transition

which exists in linear PDs

and eliminates static phase errors caused by current mismatch in the charge pump.Furthermore

the layout of the proposed PD in a 1.2-V 0.13μm CMOS process is implemented.Finally

the HSPICE post-layout simulation is performed.The simulation results show that the proposed PD can detect the delay difference between two phases no less than 1ps

and achieve the resolution of 0.18 degree.