Differential-mode/common-mode feedforward transconductor for low-voltage Gm-C filters

被引：2
|
作者：
Khumsat, Phanumas [1 ]
Worapishet, Apisak [2 ]
Noulkaew, Klanarong [1 ]
Soorapanth, Theerachet [3 ]
机构：
[1] Prince Songkla Univ, Fac Engn, Dept Elect Engn, Hat Yai, Thailand
[2] Mahanakorn Univ Technol, Mahanakorn Microelect Res Ctr, Bangkok, Thailand
[3] Natl Sci & Technol Dev Agcy, Thailand IC Design Incubator, Bangkok, Thailand
来源：
2006 13TH IEEE INTERNATIONAL CONFERENCE ON ELECTRONICS, CIRCUITS AND SYSTEMS, VOLS 1-3 | 2006年
关键词：
D O I：
10.1109/ICECS.2006.379706
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：
Low-voltage transconductor circuits suitable for G.-C filter are proposed. The proposed structures were developed from a well-known Nauta's inverter-type class-AB transconductor to improve common-mode rejection without sacrificing extra power consumption. The improvement relies on feed-forwarding both common-mode and differential mode signals, making it power efficient because additionally power has not be wasted only for suppressing common-mode signal. The concept has been confirmed by comparison with simulation on 1-V 5(th)-order Chebyshev lowpass filters constructed from the proposed transconductors in 0.18 mu m CMOS process. The proposed transconductors offer improvement on common-mode rejection by 50dB with 20% less current consumption while still preserving dynamic range.
引用
收藏
页码：82 / +
页数：2
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