Analysis and Optimization of SFDR in Differential Active-RC Filters

被引：5
|
作者：
Meghdadi, Masoud [1 ]
Bakhtiar, M. Sharif [1 ]
机构：
[1] Sharif Univ Technol, Dept Elect Engn, Tehran 1458889694, Iran
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2012年 / 59卷 / 06期
关键词：
Active-RC filters; channel selection; IIP3; low power; Miller-compensated op amps; noise; phase margin; scaling; SFDR optimization; third-order intermodulation (IM3); DYNAMIC-RANGE OPTIMIZATION; DISTORTION ANALYSIS; C FILTERS; CIRCUITS; RECEIVER; CMOS;
D O I：
10.1109/TCSI.2011.2173388
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents a method for optimizing SFDR in differential active-RC filters. Simple analytical expressions for noise and third-order intermodulation (IM3) distortion in active-RC filters are derived. The nonlinear behavior of two-stage Miller-compensated op amps, which are extensively used in active-RC implementations, is also modeled. These expressions and models are used to maximize SFDR in active-RC filters by means of proper admittance scaling and optimizing the share of each op amp in the total power consumption. It is shown that both the power consumption of the filter and its area can be significantly reduced, for a given SFDR, by exploiting the presented method.
引用
收藏
页码：1168 / 1177
页数：10
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