NDLI: Implementation of an improved active CMOS mixer with high linearity for wideband wireless systems

Content Provider	IEEE Xplore Digital Library
Author	Fan Xiangning Zhang Lei Zhu Chisheng Wu Rui
Copyright Year	2010
Description	Author affiliation: Institute of RF- & OE-ICs, School of Information Science and Engineering, Southeast University Nanjing 210096, China (Fan Xiangning; Zhang Lei; Zhu Chisheng; Wu Rui)
Abstract	This paper designs and implements an direct up-conversion mixer based on RF CMOS process, which can be used in the up-link radio frequency (RF) front-end of a 2.4GHz wideband wireless system such as multimedia wireless sensor network (WSN). Firstly, Gilbert cell-based double-balanced structure is adopted in this design, which can effectively suppress the feed-through of the local oscillator (LO) signal to the RF port, and as well as that of the intermediate frequency (IF) signal to the RF port. Then, an improved Gilbert cell structure-based circuit is proposed by introducing source degeneration technique to improve the linearity of the up-mixer. LC resonant network is used as load of the mixer to select the first-order mixing items. Finally, the mixer is fabricated in TSMC 0.18μm 1P6M RF CMOS process. Measured results show that the mixer performs well and has better linearity, the input 1dB compression point is −1dBm, and the conversion gain is −0.5dB with the total current (including the mixer core and the buffer) of 16mA. The entire chip area (including the pads) is 780μm×560μm.
Starting Page	1
Ending Page	4
File Size	554786
Page Count	4
File Format	PDF
ISBN	9781424463527
e-ISBN	9781424463558
DOI	10.1109/ISSSE.2010.5606937
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mixers Radio frequency Baseband Linearity Gain CMOS integrated circuits Transistors wireless sensor network up-conversion mixer Gilbert cell structure source degeneration technique linearity
Content Type	Text
Resource Type	Article

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