| A wideband current-commutating passive mixer for multi-standard receivers in a 0.18 μm CMOS |
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| 引用本文： | 包宽,樊祥宁,李伟,王志功.A wideband current-commutating passive mixer for multi-standard receivers in a 0.18 μm CMOS[J].半导体学报,2013(1):74-82. |
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| 作者姓名： | 包宽 樊祥宁 李伟 王志功 |
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| 作者单位： | Institute of RF-&OE-ICs,School of Information Science and Engineering,Southeast University |
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| 基金项目： | Project supported by the National Science and Technology Major Project (No.2010ZX03007-002-01);the State Key Development Program for Basic Research of China (No.2010CB327404) |
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| 摘 要： | This paper reports a wideband passive mixer for direct conversion multi-standard receivers.A brief comparison between current-commutating passive mixers and active mixers is presented.The effect of source and load impedance on the linearity of a mixer is analyzed.Specially,the impact of the input impedance of the transimpedance amplifier(TIA),which acts as the load impedance of a mixer,is investigated in detail.The analysis is verified by a passive mixer implemented with 0.18 m CMOS technology.The circuit is inductorless and can operate over a broad frequency range.On wafer measurements show that,with radio frequency(RF) ranges from 700 MHz to 2.3 GHz,the mixer achieves 21 dB of conversion voltage gain with a-1 dB intermediate frequency(IF) bandwidth of 10 MHz.The measured IIP3 is 9 dBm and the measured double-sideband noise figure(NF) is 10.6 dB at 10 MHz output.The chip occupies an area of 0.19 mm2 and drains a current of 5.5 mA from a 1.8 V supply.
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| 关 键 词： | CMOS current-commutating passive mixer linearity source and load impedance multi-standard receiver wideband |
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