Improved Biquad Structures Using Double-Output Transconductance Blocks for Tunable Continuous-Time Filters

被引：0
|
作者：
Vladimir I. Prodanov
Michael M. Green
机构：
[1] University at Stony Brook,Department of Electrical Engineering
来源：
Analog Integrated Circuits and Signal Processing | 1997年 / 13卷
关键词：
active filters; biquadratic filters; continous-time filters; tunable filters; analog integrated circuits;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A family of gm-C biquad structures is derived. These biquads require only a pair of grounded capacitors and three transconductors. It is shown that a pair of complex zeros can be realized simply by replicating the output stage of the transconductance block, thereby constructing a second output current that is proportional to the original output current. Although these biquad structures are very compact, they allow independent programming of the filter's center frequency andQ . IC simulations and measurements are presented using a fifth-order tunable filter as an example.
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页码：233 / 240
页数：7
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