基于SC抽取滤波器的射频采样前端噪声分析与噪声估计

Proceedings of the International Conference Mixed Design of Integrated Circuits and System, 2006. MIXDES 2006. Pub Date : 2006-06-22 DOI:10.1109/MIXDES.2006.1706596

S. Andersson, J. Konopacki, J. Dabrowski, C. Svensson

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引用次数: 6

摘要

本文给出了用于射频采样和下变频的SC滤波器的噪声分析。该滤波器采用0.12 μ m CMOS实现，主要用于2.4 GHz频段和20 MHz信号带宽的WLAN。讨论了开关电容电路的基本噪声特性，并推导了滤波器噪声计算所需的方程。讨论了放大器噪声的影响，提出了一种消除放大器低频噪声和直流偏置的技术。最后，对一个完整的射频采样前端进行了噪声估计。通过Cadence Spectre射频仿真验证了我们的研究结果

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Noise Analysis And Noise Estimation Of An RF Sampling Front-end Using An SC Decimation Filter

In this paper we present the noise analysis of an SC filter for RF sampling and downconversion. The filter implementation is made in 0.12mum CMOS and is primarily intended for WLAN in the 2.4 GHz band and with 20 MHz signal bandwidth. The fundamental noise properties of switched capacitor circuits are discussed while deriving the necessary equations needed for the filter noise calculation. The influence of amplifier noise is also discussed, and a technique to remove low-frequency noise and DC offset from the amplifiers is presented. Finally, a noise estimation of a complete RF sampling front-end is made. Our results are verified by simulations using Cadence Spectre RF simulations

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Proceedings of the International Conference Mixed Design of Integrated Circuits and System, 2006. MIXDES 2006.

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