An ultra-wideband distributed active mixer MMIC in 0.18-mu m CMOS technology

作者：Wu Chung Ru^*; Hsieh Hsieh Hung; Lu Liang Hung

来源：IEEE Transactions on Microwave Theory and Techniques, 2007, 55(4): 625-632.

DOI：10.1109/TMTT.2007.892799

• complementary transconductance stages
• conversion gain (CG)
• current-bleeding technique
• distributed active mixers
• Gilbert cells
• nonuniform artificial transmission lines
• ultra-wideband operations

In this paper, a distributed circuit topology for active mixers suitable for ultra-wideband operations is presented. By employing nonuniform artificial transmission lines with the complementary transconductance stages in the Gilbert-cell multiplier, the proposed mixer demonstrates broadband characteristics at microwave frequencies while maintaining a high conversion gain (CG) with improved gain flatness. Using a 0.18-mu m CMOS process, the proposed circuit is implemented, exhibiting a -3-dB bandwidth of 28 GHz. With a local-oscillator power of 3 dBm and an IF frequency of 10 MHz, the fabricated circuit has a CG of 12.5 +/- 1 dB and an average input third-order intercept point (IIP3) of 0 dBm within the entire frequency range. The fully integrated wideband mixer occupies a chip area of 0.87 x 0.82 mm(2) and consumes a dc power of 20 mW from a 2-V supply voltage.

• 出版日期2007-4
• 单位中国科学院电工研究所