A 0.6-V 30 GHz CMOS Quadrature VCO Using Microwave 1:1:1 Trifilar Transformer

Author

Syu, Jin-Siang ; Lu, Hsi-Liang ; Meng, Chinchun

Author_Institution

Dept. of Electr. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

22

Issue

2

fYear

2012

Firstpage

88

Lastpage

90

Abstract

A 30 GHz trifilar-transformer-coupled quadrature voltage-controlled oscillator (QVCO) is proposed in this letter using 0.13 μm CMOS technology. The trifilar transformer provides dc decoupling as well as ac mutual coupling from drain, gate, and source nodes. The mutual coupling increases the overall quality factor while the gate/drain-to-source coupling provides quadrature coupling. The proposed 1:1:1 trifilar transformer realization has lower ohmic loss than the conventional trifilar transformer realization and is especially suitable for high-frequency applications. As a result, the proposed 30 GHz QVCO has a -195 dBc/Hz figure of merit (FOM) and a maximum 41.6 dB sideband rejection (SBR) at a 0.6 V supply.

Keywords

CMOS integrated circuits; MMIC oscillators; Q-factor; field effect MMIC; transformers; voltage-controlled oscillators; CMOS quadrature VCO; MMIC oscillators; ac mutual coupling; dc decoupling; figure of merit; frequency 30 GHz; gate/drain-to-source coupling; microwave 1:1:1 trifilar transformer; quadrature coupling; quality factor; sideband rejection; size 0.13 mum; source nodes; voltage 0.6 V; CMOS integrated circuits; Couplings; Layout; Logic gates; Microwave oscillators; Phase noise; Voltage-controlled oscillators; Quadrature voltage-controlled oscillator (QVCO); sideband rejection (SBR); trifilar transformer;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2011.2180369

Filename

6138878