用于WLAN 802.11a应用的CMOS正交调制器设计

2005 IEEE International Wkshp on Radio-Frequency Integration Technology: Integrated Circuits for Wideband Comm & Wireless Sensor Networks Pub Date : 1900-01-01 DOI:10.1109/RFIT.2005.1598904

Zhiqun Li, J. Su, Zhigong Wang

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引用次数: 0

摘要

本文介绍了采用台积电0.18-/spl mu/m CMOS技术设计用于802.11a无线局域网系统的1 ghz正交调制器。采用改进型双平衡混频器、双平衡混频器、共模反馈电路和改进型跨导放大器相结合的方法，提高了调制器的线性度。实验结果表明，该调制器在P/sub 1 dB/下可实现-5 dBm，在LO-IF隔离时可实现-42 dB，增益为1.2 dB。功耗为49mw，电源为1.8 v。

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Design of CMOS quadrature modulator for WLAN 802.11a application

This paper describes the design of a 1-GHz quadrature modulator for 802.11a WLAN systems with TSMC 0.18-/spl mu/m CMOS technology. By using an improved double-balanced mixer combined with a double-balanced mixer, a common-mode feedback circuit and an improved transconductance amplifier, the linearity of the modulator is improved. The experimental results show the modulator achieves -5 dBm for P/sub 1 dB/, -42 dB for LO-IF isolation, and a gain of 1.2 dB. The power consumption is 49 mW with a 1.8-V power supply.

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2005 IEEE International Wkshp on Radio-Frequency Integration Technology: Integrated Circuits for Wideband Comm & Wireless Sensor Networks

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