A V-band 90-nm CMOS Divide-by-10 Injection-Locked Frequency Divider Using Current-Reused Topology

A V-band 90-nm CMOS divide-by-10 injection-locked frequency divider (ILFD) is proposed using current-reused topology in this letter. The proposed circuit is composed of a divide-by-5 ILFD and a source injection current-mode logic (SICML) divide-by-2 frequency divider. The cascoded topology of SICML and ILFD is employed to reduce dc power consumption and increase frequency division ratio. With an input power of 0 dBm, the measured maximum locking range (LR) is 5 GHz from 60.3 to 65.3 GHz. Compared with the reported CMOS microwave and millimeter-wave ILFDs, the proposed ILFD features wide LR, good sensitivity, and a high division ratio of up to ten.