A 24-GHz LC-QVCO in 130-nm CMOS using 4-bit switched tuning

Author

Törmanen, Markus ; Sjoland, Henrik

Author_Institution

Dept. of Electr. & Inf. Technol., Lund Univ., Lund, Sweden

fYear

2008

fDate

14-17 Dec. 2008

Firstpage

421

Lastpage

424

Abstract

A 24 GHz 130-nm CMOS quadrature voltage controlled oscillator using 4-bit switched frequency tuning is presented. It consists of two differential oscillators coupled to oscillate in quadrature through transistors and mutual inductance between the source nodes. The frequency tuning is accomplished by 4 bits controlling an array of MOS varactors in each resonance tank, combined with a small continuously tuned varactor. The oscillator measures a frequency tuning range of 4.3%, and a worst case phase noise over the tuning range of -111.6 dBc/Hz at 1 MHz offset, with a 1.35 V supply and a power consumption of 24 mW.

Keywords

CMOS analogue integrated circuits; MMIC oscillators; circuit tuning; field effect MMIC; inductance; phase noise; varactors; voltage-controlled oscillators; 4-bit switched frequency tuning; CMOS quadrature voltage controlled oscillator; LC-QVCO; MOS varactors; differential oscillators; frequency 24 GHz; mutual inductance; phase noise; power 24 mW; resonance tank; size 130 nm; small continuously tuned varactor; transistors; voltage 1.35 V; Frequency measurement; Inductance; Mutual coupling; Noise measurement; Phase measurement; Power measurement; Resonance; Tuning; Varactors; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics, 2008. ICM 2008. International Conference on

Conference_Location

Sharjah

Print_ISBN

978-1-4244-2369-9

Electronic_ISBN

978-1-4244-2370-5

Type

conf

DOI

10.1109/ICM.2008.5393773

Filename

5393773