A 120 GHz voltage controlled oscillator integrated with 1/128 frequency divider chain in 65 nm CMOS technology

Namhyung Kim, Jongwon Yun, Jae-Sung Rieh

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3 Citations (Scopus)


A 120 GHz voltage controlled oscillator (VCO) with a divider chain including an injection locked frequency divider (ILFD) and six static frequency dividers is demonstrated using 65-nm CMOS technology. The VCO is designed based on the LC cross-coupled push-push structure and operates around 120 GHz. The 60 GHz ILFD at the first stage of the frequency divider chain is based on a similar topology as the core of the VCO to ensure the frequency alignment between the two circuit blocks. The static divider chain is composed of D-flip flops, providing a 64 division ratio. The entire circuit consumes a DC power of 68.5 mW with the chip size of 1385 × 835 μm2.

Original languageEnglish
Pages (from-to)131-137
Number of pages7
JournalJournal of Semiconductor Technology and Science
Issue number1
Publication statusPublished - 2014 Feb 1



  • Injection locked frequency divider
  • Phase noise
  • Voltage controlled oscillator

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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