Mixed-mode automatic tuning scheme for high-Q continuous-time filters

被引：0
|
作者：
Karsilayan, AI [1 ]
Schaumann, R
机构：
[1] Texas A&M Univ, Dept Elect Engn, College Stn, TX 77834 USA
[2] Portland State Univ, Dept Elect & Comp Engn, Portland, OR 97207 USA
来源：
IEE PROCEEDINGS-CIRCUITS DEVICES AND SYSTEMS | 2000年 / 147卷 / 01期
关键词：
D O I：
暂无
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：
An automatic tuning scheme using envelope detectors and simple mixed-mode circuitry is discussed. The method is developed especially for filters with large Q values and can be used at very high operating frequencies. The circuit was designed in a 1.2 mu m CMOS process with a 3V single supply voltage. As a demonstration filter, a second-order g(m)-C bandpass section is used, but the method can also be applied to lowpass and highpass sections. The measured frequency tuning error is less than 0.3% for filters with Q > 80 operating in the range of 105MHz-120MHz.
引用
收藏
页码：57 / 64
页数：8
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