A Transformer-Feedback Quadrature Voltage-Controlled Oscillator Using a Transconductance Tuning Technique

Author

Wu, Tsung-Chan ; Yang, Ching-Yuan

Author_Institution

Nat. Chung-Hsing Univ., Taichung

fYear

2007

fDate

20-22 Dec. 2007

Firstpage

449

Lastpage

452

Abstract

This paper presents a transformer-feedback quadrature voltage-controlled oscillator (QVCO) using a transconductance tuning technique in 0.18-um CMOS process. The proposed topology uses integrated transformers to produce quadrature phase and employ a transconductance tuning technique for frequency tuning. The measured phase noise is -101 dBc/Hz _~ -104dBc/Hz at 1-MHz offset. The tuning range is from 5.97 GHz to 6.81 GHz, achieved by the control voltage from -0.9 V to 0.9 V. The measured phase error of the QVCO is below 2.2deg. The power consumption is 8.44 mW _~ 17.88 mW and the figure of merit (FOM) is -167.3_~ -168 dB.

Keywords

CMOS integrated circuits; transformers; voltage-controlled oscillators; CMOS process; integrated transformers; transconductance tuning; transformer-feedback quadrature voltage-controlled oscillator; CMOS process; Frequency; Noise measurement; Phase measurement; Phase noise; Topology; Transconductance; Transformers; Tuning; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices and Solid-State Circuits, 2007. EDSSC 2007. IEEE Conference on

Conference_Location

Tainan

Print_ISBN

978-1-4244-0637-1

Electronic_ISBN

978-1-4244-0637-1

Type

conf

DOI

10.1109/EDSSC.2007.4450159

Filename

4450159