11-Gb/s 140-GHz OOK Modulator with 24.6 dB Isolation utilizing Cascaded Switch and Amplifier Based Stages in 65-nm Bulk CMOS

This study presents a complementary metal-oxide-semiconductor (CMOS) 140 GHz on-off-keying (OOK) modulator with high isolation and low ON-state insertion loss based on a cascaded architecture of a switch-based and amplifier-based modulators. A prototype implemented in a 65 nm bulk CMOS process operates at 140 GHz carrier input and realises 24.6 dB isolation, whereas in ON-state it achieves 0.3 dB ...