11 Gb/s 140 GHz OOK modulator with 24.6 dB isolation utilising cascaded switch and amplifier-based stages in 65 nm bulk CMOS

Daisuke Yamazaki, Yoshitaka Otsuki, Takafumi Hara, Nguyen Ngoc Mai Khanh, Tetsuya Iizuka

Research output: Contribution to journalArticle


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 gain and â'0.2 dBm OP1 dB with 8 mW power consumption. Up to 11 Gb/s modulation is verified with the spectrum and demodulated waveform measurements. The proposed OOK modulator occupies the core area of 250×380 μm2.

Original languageEnglish
Pages (from-to)322-326
Number of pages5
JournalIET Circuits, Devices and Systems
Issue number3
Publication statusPublished - May 1 2020


ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this