A 2.4 GHz CMOS Low-IF Receiver Front-End for WLAN Applications |
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| Authors: | Yi Lu Kuang-Hu Huang Chorng-Kuang Wang |
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| Affiliation: | (1) Communication R&D Dept., Winbond Electronic Corp., Hsin-Chu, Taiwan, R.O.C;(2) System Design Center, Winbond Electronic Corp. America, Los Angeles, CA;(3) Department of Electrical Engineering, Institute of Electrical Engineering, National, Taiwan University, Taipei, Taiwan, R.O.C. |
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| Abstract: | A CMOS low-IF receiver front-end applied for Wireless Local Area Networks (WLANs) is presented in this paper. The receiver front-end comprises a low noise amplifier (LNA), a down-converter, a single-to-fully converter, a polyphase filter, and a summator/subtractor. This low-IF architecture achieves 0.46° phase error and 0.7 dB gain mismatch in I–Q channels while the 2.4 GHz RF signal is down-converted into 100 MHz of IF band. The cascaded noise figure (NF) of LNA and polyphase network is 4.89 dB within the WLANs' requirement. The chip realized in a 0.6  m CMOS technology occupys 2.4 mm × 2.1 mm active area. From a single 3.3 V power supply, it consumes 300 mW power. |
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