A balanced output CMOS OTA with wide linear current tunable range

被引：5
|
作者：
Kaewdang, Khanittha [1 ]
Surakampontorn, Wanlop [2 ]
机构：
[1] Ubon Ratchathani Univ, Fac Engn, Dept Elect & Elect Engn, Warinchamrap 34190, Ubon Ratchathan, Thailand
[2] King Mongkuts Inst Technol Ladkrabang, Fac Engn, Dept Elect, Bangkok 10520, Thailand
来源：
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS | 2011年 / 65卷 / 09期
关键词：
Balanced output operational; transconductance amplifier (BOTA); CMOS transconductor; Electronically tunable OTA; Linearly tuned; TRANSCONDUCTOR; FILTERS;
D O I：
10.1016/j.aeue.2010.10.005
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 new CMOS-based balanced output operational transconductance amplifier (BOTA) with very wide linear current tunable range is proposed in this paper. The design technique is achieved by the combination of a fully differential transconductor and an electronically variable current gain stage. The transconductance gain of the proposed BOTA can be linearly tuned by an external bias current for more than 4 decades, with less than 4% nonlinearity for the linear input-voltage range of about 0.2 V-peak. The OTA is designed in 0.5 mu m AMIS technology. The performance of the proposed circuit is discussed and confirmed through application example and PSPICE simulation results. (C) 2010 Elsevier GmbH. All rights reserved.
引用
收藏
页码：728 / 733
页数：6
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