An open-loop fractional divider based on direct phase synthesis

Abstract

This work presents an open-loop fractional divider based on direct phase synthesis. The proposed fractional divider is pure digital circuit and with low cost. It also has fast switching speed within 2 clock cycles. The fractional part can range from 2-1 ~ 2-24 with fine resolution. An example by using FPGA of proposed fractional frequency divider has been successfully developed.