A Low Voltage Mixer With Improved Noise Figure

Author

Chen, Chih-Hao ; Chiang, Pei-Yuan ; Jou, Christina F.

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu

Volume

19

Issue

2

fYear

2009

Firstpage

92

Lastpage

94

Abstract

A 5.2 GHz low voltage mixer with improved noise figure using TSMC 0.18 mum CMOS technology is presented in this letter. This mixer utilizes current reuse and ac-coupled folded switching to achieve low supply voltage. The noise figure of the mixer is strongly influenced by flicker noise. A resonating inductor is implemented for tuning out the parasitic components, which not only can improve noise figure but also enhance conversion gain. A low voltage mixer without resonating technique has also been fabricated and measured for comparison. Simulated results reveal that flicker corner frequency is lowered. The measured results show 4.5 dB conversion gain enhancement and 4 dB reduction of noise figure. The down-conversion mixer with resonating inductor achieves 5.8 dB conversion gain, -16 dBm P_1dB, -6 dBm IIP₃ at power consumption of 3.8 mW and 1 V supply voltage.

Keywords

CMOS integrated circuits; inductors; low-power electronics; mixers (circuits); CMOS technology; ac-coupled folded switching; current reuse; down-conversion mixer; flicker corner frequency; frequency 5.2 GHz; gain 4.5 dB; gain 5.8 dB; improved noise figure; low supply voltage; low voltage mixer; noise figure; power 3.8 mW; resonating inductor; size 0.18 micron; voltage 1 V; Current reuse; flicker noise; folded switching; low voltage mixer;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.2011329

Filename

4770120