A 52-to-67 GHz dual-core push-push VCO in 40-nm CMOS

Vadim Issakov, Johannes Rimmelspacher, Saverio Trotta, Marc Tiebout, Amelie Hagelauer, Robert Weigel

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We present a continuously tunable 52-to-67 GHz push-push dual-core voltage-controlled oscillator (VCO) in a 40 nm bulk complementary metal-oxide-semiconductor (CMOS) technology. The circuit is suitable for 60 GHz frequency-modulated-continuous-wave radar applications requiring a continuously tunable ultra-wide modulation bandwidth. The LC-tank inductor is used to couple the two VCO cores. The fundamental frequency of the VCO can be tuned from 26 to 33.5 GHz, which corresponds to a frequency tuning range of 25%. The second harmonic is extracted in a non-invasive way using a transformer. The primary side acts simultaneously as a second harmonic filter. The VCO achieves in measurement a low phase noise of -91.8 dBc/Hz at 1 MHz offset at 62 GHz and an output power of -20 dBm. The VCO including buffers dissipates in the dual-core operation mode 60 mA from a single 1.1 V supply and consumes a chip area of 0.58 mm2.

Original languageEnglish
Pages (from-to)783-793
Number of pages11
JournalInternational Journal of Microwave and Wireless Technologies
Volume10
Issue number7
DOIs
StatePublished - 1 Sep 2018
Externally publishedYes

Keywords

  • Active circuits
  • Oscillators

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