Compact 141-GHz Differential Amplifier with 20-dB Peak Gain and 22-GHz 3-dB Bandwidth

Shinsuke HARA  Kosuke KATAYAMA  Kyoya TAKANO  Issei WATANABE  Norihiko SEKINE  Akifumi KASAMATSU  Takeshi YOSHIDA  Shuhei AMAKAWA  Minoru FUJISHIMA  

IEICE TRANSACTIONS on Electronics   Vol.E99-C    No.10    pp.1156-1163
Publication Date: 2016/10/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E99.C.1156
Type of Manuscript: Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
millimeter wave circuits,  CMOS process,  amplifiers,  frequency estimation,  

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This paper presents a wideband differential amplifier operating at 141GHz in 40-nm CMOS. It is composed of five differential common source stages with cross-coupled capacitors. A small-signal gain of 20dB and a 3-dB bandwidth of 22GHz are achieved. It consumes 75mW from a 0.94-V voltage supply. The die area with balun and pads is 945×842µm2 and the size of the core not including input/output matching networks is 201×284µm2. The small core area is made possible by using a refined “fishbone” layout technique.