A novel Q-tuning scheme for continuous time filters

被引：2
|
作者：
Salmeh, R [1 ]
Maundy, B [1 ]
机构：
[1] Univ Calgary, Dept Elect & Comp Engn, Calgary, AB T2N 1N4, Canada
来源：
INTERNATIONAL JOURNAL OF ELECTRONICS | 2002年 / 89卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
The ahus wooultdrlike to acknowledge the support of the NtaulaSciernces and Enineeringg Research Council (NSERC) of Cana aand dthe Canaan Networdkiof Centers of Excellence in Microelectronics (MICRONET);
D O I：
10.1080/00207210210160945
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 quality-factor-tuning scheme for analogue lowpass or highpass continuous time filters is presented. The proposed method uses the LMS algorithm to simultaneously adapt the quality factor of a desired filter and the phase shift of an allpass filter. Simulation results confirm the validity of the technique for both Q and phase shift tuning. An experimental setup of a circuit using discrete components shows that an error in Q of 1.7% at a desired Q of 0.68 is possible and that the scheme is adaptive to changes in input amplitude and frequency.
引用
收藏
页码：477 / 491
页数：15
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