An LO phase mismatch compensation technique for noise reduction in active mixers

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• 作者：Sanghyun Woo ; Hyoungsoo Kim ; Joy Laskar
• 关键词：CMOS integrated circuits ; Flicker noise ; Active mixer ; Direct ; conversion architecture
• 刊名：Analog Integrated Circuits and Signal Processing
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：86
• 期：3
• 页码：353-363
• 全文大小：2,032 KB
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• 作者单位：Sanghyun Woo (1)
  Hyoungsoo Kim (2)
  Joy Laskar (3)
  
  1. Qualcomm, San Diego, CA, USA
  2. Cal Poly Pomona, Pomona, CA, USA
  3. Ayana360 and Hong Kong University of Science and Technology, Hong Kong, China
  
• 刊物类别：Engineering
• 刊物主题：Circuits and Systems
  Electronic and Computer Engineering
  Signal,Image and Speech Processing
  
• 出版者：Springer Netherlands
• ISSN：1573-1979

文摘

A detection and compensation technique for LO phase mismatches is presented to reduce noise in the mixer. Based on theoretical analysis and simulation, this work shows that the LO phase mismatch degrades the noise figure, gain, and linearity of the mixer. To compensate the LO phase mismatch, a new concept of the mixer is proposed, and its prototype is fabricated in 0.18-μm CMOS technology. In addition, a current bleeding mixer, which is known for low flicker noise topology, is also fabricated for comparative purposes. From the measured results, the proposed mixer reduces the flicker noise corner frequency by almost half when it is compared to the current bleeding mixer. Moreover, the proposed mixer improves gain and linearity without additional power consumption. Keywords CMOS integrated circuits Flicker noise Active mixer Direct-conversion architecture