A 102-129-GHz 39-dB Gain 8.4-dB Noise Figure I/Q Receiver Frontend in 28-nm CMOS

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An F-band in-phase/quadrature-phase (I/Q) receiver front-end in 28-nm CMOS for chip-to-chip communication is presented. The receiver consists of a capacitively neutralized differential low-noise amplifier (LNA) chain, a passive ring mixer, zero-IF drivers, and a novel tunable transformer-based quadrature splitter. This paper discusses the effect of capacitive neutralization on common-mode stability, matching losses, and the noise performance of a differential pair. A technique for gain and noise-figure optimization by core sizing and partial neutralization is presented. The receiver exhibits a gain of 39 dB, a 3-dB RF bandwidth of 27 GHz, a noise figure between 8.4 and 10.4 dB, and a P1 dB of 3.2 dBm. The receiver front-end consumes 18 mW from a 1.0-V supply and the baseband I and Q buffers consume a total of 33 mW from a 1.5-V supply. A breakout of the LNA shows a measured gain of 21 dB, a noise figure of 8.0-9.4 dB, with a gain power efficiency of 1.2 dB/mW around 125 GHz.

Original languageEnglish
Article number7452667
Pages (from-to)1535-1543
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number5
StatePublished - May 2016


  • 28 nm
  • Chip-to-chip
  • F-band
  • common-mode stability
  • low-noise amplifier (LNA)
  • millimeter-wave
  • neutralization
  • noise figure
  • passive mixer
  • transformer-based phase shifter

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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