A CMOS 300-GHz Injection-Locked Frequency Tripler With a Tri-Layer Dual Coupled Line for Improved Locking Range

Sooyeon Kim, Daekeun Yoon, Jungsoo Kim, Junghwan Yoo, Kiryong Song, Jae Sung Rieh

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A triple-push sub-harmonic injection-locked ring tripler is presented in this brief. The circuit converts a 100-GHz injection signal to an output signal of around 300 GHz. The circuit employs a tri-layer dual coupled line, which is composed of three layers of metal stack. The signal injection through the tri-layer dual coupled line structure disturbs the symmetry in the injection-locked ring tripler, leading to a locking range enhancement. The circuit, fabricated in a 65-nm CMOS process, achieved a locking range of up to 24 GHz with a 3-dBm injection power. A measured output power larger than -18 dBm was obtained at the free-running frequency of 302 GHz. The measured phase noise was -105 dBc/Hz at 1-MHz offset.

Original languageEnglish
Pages (from-to)309-313
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume69
Issue number2
DOIs
Publication statusPublished - 2022 Feb 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government under Grant NRF-2021R1A2C3009096.

Publisher Copyright:
© 2021 IEEE.

Keywords

  • Couplings
  • Harmonic analysis
  • Impedance
  • Metals
  • Oscillators
  • Power generation
  • Ring oscillators

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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