A WIDEBAND CMOS CURRENT-MODE DOWN-CONVERSION MIXER FOR MULTI-STANDARD RECEIVERS

Qiuzhen Wan, Chunhua Wang
2012 Electromagnetic Waves  
This paper presents a low voltage wideband downconversion mixer using current-mode approach for multi-standard receivers. The proposed mixer uses a current mirror amplifier with an embedded passive switching core to achieve mixing function, which can combine the advantages of active and passive mixers simultaneously. The mixer is implemented using a 0.18 µm CMOS technology and covers frequency band from 0.5 GHz to 4.0 GHz. A comparison with conventional CMOS down-conversion mixer shows that
more » ... currentmode mixer has advantages of large conversion gain, low noise figure and high linearity. Over the entire bandwidth, the mixer features a measured power conversion gain of 8.9 ∼ 9.6 dB, a double-sideband (DSB) noise figure of 6.9 ∼ 9.3 dB and an input third-order intercept point (IIP3) of 2.0 ∼ 5.8 dBm, while consuming 8 mA from a 1.2 V supply voltage. The mixer occupies the active area of 0.43 × 0.46 mm 2 including testing pads.
doi:10.2528/pier12032001 fatcat:zb3bjppuy5hurnyv3htjfqqvxu