Dual mixer downconversion architecture using complex mixing signals: enabling solutions for software defined radios

Author

Manku, Tajinder ; Snyder, Christopher ; Ting, Michele ; Ling, Yang ; Khajehpour, Javad ; Kung, Bill ; Wong, Lawrence

Author_Institution

SiRiFIC Wireless Corp., Waterloo, Ont., Canada

fYear

2002

fDate

2002

Firstpage

227

Lastpage

234

Abstract

A dual mixer architecture using complex mixing functions to perform RF downconversion is described. This architecture eliminates the need for the image-reject and IF filters present in the heterodyne architecture, while achieving better LO leakage, 1/f noise. and second-order intercept performance than the direct conversion architecture. This architecture, implemented in a 1.8 V, 0.18 μm CMOS process, achieves a maximum IIP2 of 85 dBm, a baseband 1/f noise corner frequency of less than 100 kHz, a LO-RF leakage equaling -138 dBm, and an operating frequency ranging from 400 MHz to 2.5 GHz.

Keywords

1/f noise; CMOS analogue integrated circuits; UHF frequency convertors; UHF integrated circuits; UHF mixers; integrated circuit noise; leakage currents; software radio; 0.18 micron; 1.8 V; 1/f noise; 400 MHz to 2.5 GHz; CMOS process; LO leakage; LO-RF leakage; RF downconversion; baseband 1/f noise corner frequency; complex mixing signals; dual mixer downconversion architecture; heterodyne architecture; maximum IIP2; operating frequency; second-order intercept performance; software defined radio; Baseband; Computer architecture; Filters; Frequency conversion; Image converters; Mixers; RF signals; Radio frequency; Software radio; Tunable circuits and devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 2002. Proceedings of the IEEE 2002

Print_ISBN

0-7803-7250-6

Type

conf

DOI

10.1109/CICC.2002.1012802

Filename

1012802