標題: | An Ultra-Wideband High-Linearity CMOS Mixer With New Wideband Active Baluns |
作者: | Rao, Pei-Zong Chang, Tang-Yuan Liang, Ching-Piao Chung, Shyh-Jong 電信工程研究所 Institute of Communications Engineering |
關鍵字: | Active baluns;CMOS;mixers;phase splitters;ultra-wideband (UWB) |
公開日期: | 1-九月-2009 |
摘要: | A 2-11-GHz high linearity CMOS down-conversion mixer with wideband active baluns using 0.18-mu m CMOS technology is demonstrated in this paper. The mixer employs a folded cascode Gilbert cell topology and on-chip broadband active baluns. The folded cascode approach is adopted to increase the output swing, and the linearity is enhanced by a harmonic distortion canceling technique derived from the harmonic balance analysis. The proposed configuration shows the highest HP(3) and IP(1 dB), and exhibits more compact size than most published studies. A broadband active balun is used to generate wideband differential signals, together with the derivation of a closed-form expression for the phase imbalance. This single-ended wideband mixer has the conversion gain of 6.9 +/- 1.5 dB, input 1-dB compression point (IP(1 dB)) of - 3.5 dBm, single-sideband noise figure of 15.5 dB, and third-order input intercept point (HP(3)) of 6.5 dBm under the power consumption of 25.7 mW from a 1.8-V power supply. The chip area is 0.85 x 0.57 mm(2). |
URI: | http://dx.doi.org/10.1109/TMTT.2009.2027079 http://hdl.handle.net/11536/6703 |
ISSN: | 0018-9480 |
DOI: | 10.1109/TMTT.2009.2027079 |
期刊: | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES |
Volume: | 57 |
Issue: | 9 |
起始頁: | 2184 |
結束頁: | 2192 |
顯示於類別: | 期刊論文 |