This work mainly focused on research of high speed frequency divider and its application. A current mode logic divider with nearly full voltage swing was designed. The divider could be directly connected to CMOS logic without level shifter circuit. 本文主要研究高速分频电路及其应用。完成了一种电流模式逻辑(CML)(CML)分频器设计,电压输出近似为满摆幅,可以直接和CMOS逻辑电路相连而不需要电平移位电路。