OTAs-Based Current-Mode Quadrature Oscillator

被引：0
|
作者：
Kumngern, Montree [1 ]
Dejhan, Kobchai [1 ]
机构：
[1] King Mongkuts Inst Technol Ladkrabang, Fac Engn, Telecommun Engn Dept, Bangkok 10520, Thailand
来源：
2008 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATIONS SYSTEMS (ISPACS 2008) | 2008年
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：
A current-mode quadrature oscillator using two operational transconductance aTmplifiers (OTAs) and two grounded capacitors is presented. The circuit provides two high output impedance current sources with 90 degrees' phase difference. The oscillation frequency can be controlled electronically by adjusting the bias current/voltage of OTAs. The proposed circuit employs only grounded capacitors and requires no resistors. The use of only grounded capacitors is ideal for IC implementation. The proposed structure is eminently suitable for implementation in both bipolar and CMOS technologies. The theoretical results are verified by PSpice simulation.
引用
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页码：154 / 157
页数：4
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