2 GHz Q-enhanced active filter with low passband distortion and high dynamic range

被引：56
作者：
Georgescu, Bogdan [1 ]
Finvers, Ivars G. [1 ]
Ghannouchi, Fadhel [1 ]
机构：
[1] Univ Calgary, Dept Elect & Comp Engn, Calgary, AB T2N 1N4, Canada
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2006年 / 41卷 / 09期
基金：
加拿大自然科学与工程研究理事会;
关键词：
dynamic range; passband distortion; Q-enhanced; RF active filter;
D O I：
10.1109/JSSC.2006.880618
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：
A tunable Q-enhanced filter with low passband distortion is presented. The Q of the on-chip spiral inductors that form the filter resonators is enhanced by using a cross-coupled differential pair which is degenerated by a second LC tank. This technique allows for frequency dependent compensation of inductor losses and ensures that the Q-enhanced LC resonators have a frequency behaviour close to the ideal in the passband of the filter. The circuit allows DC voltage control of Q-enhancement. The filter centered at 2.0 GHz with a 130 MHz bandwidth is tunable in frequency by 3%, exhibits a -6.6 dBm 1-dB compression point and a 15 dB noise figure while consuming 17 mW of DC power. The circuit was fabricated in 0.18-mu m CMOS and the performance was verified experimentally.
引用
收藏
页码：2029 / 2039
页数：11
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