A quadrature relaxation oscillator-mixer in CMOS

Author

Oliveira, Luis Bica ; Fernandes, Jorge R. ; Kouwenhoven, Michel H L ; van den Bos, C. ; Verhoeven, C.J.M.

Author_Institution

INESC, Lisboa, Portugal

Volume

1

fYear

2003

fDate

25-28 May 2003

Abstract

This paper describes the design of a quadrature cross-coupled oscillator circuit integrated which also realizes the mixer function in a phase lock loop (PLL). This should be able to provide a very accurate phase relation (<1°). This combined oscillator/mixer is first evaluated using a high-level model, in up and downconverter configurations. A circuit implementation is then carried out, in which all the variables are kept independent at circuit level, ensuring a practical implementation close to that of the high-level model. The circuit is designed in a standard 0.35 μm CMOS technology with an oscillation frequency of 900 MHz, it has an overall area of 521 × 515 μm² (157 × 119 μm² for the IQ oscillator/mixer circuit) and a power consumption of 70 mW with a 3 V power supply. The circuit performance is evaluated by simulation.

Keywords

CMOS analogue integrated circuits; UHF integrated circuits; UHF mixers; UHF oscillators; integrated circuit design; phase locked loops; relaxation oscillators; 0.35 micron; 3 V; 70 mW; 900 MHz; CMOS technology; PLL; downconverter configuration; high-level model; phase lock loop; quadrature cross-coupled oscillator circuit; quadrature relaxation oscillator-mixer; upconverter configuration; CMOS technology; Circuit optimization; Demodulation; Oscillators; Phase locked loops; Phase noise; RF signals; Radio frequency; Semiconductor device modeling; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on

Print_ISBN

0-7803-7761-3

Type

conf

DOI

10.1109/ISCAS.2003.1205657

Filename

1205657