基于四OTA正弦振荡器的系统综合法  

Systematic synthesis of four OTA-based sinusoidal oscillators

作　　者：李永安[1] 

机构地区：[1]咸阳师范学院物理与电子工程学院,陕西咸阳712000

出　　处：《兰州理工大学学报》2013年第1期72-75,共4页Journal of Lanzhou University of Technology

基　　金：陕西省自然科学基金(2012JM8017);陕西省教育厅科研计划项目(12JK0496)

摘　　要：根据OTA和零-镜元件的端口约束关系,给出SISO-OTA的4个零-镜描述.以此为基础,利用导纳矩阵扩展法实现了OTA正弦振荡器,它使用4个SISO-OTA,共有16种不同形式.由于使用了规范数目的元件,所有电路容易被集成;电路的振荡条件和振荡频率能独立地电控调节.计算机仿真结果与理论一致.Four nullor-mirror representations for SISO-OTA were given according to the constraint relation of terminals in OTA and nullor-mirror elements.Taking it as a basis,the OTA sinusoidal oscillator was realized by means of admittance matrix extension.The oscillator employs four SISO-OTAs with 16 different forms in all.Because canonical number was used for component quantity,the circuits were easy to be integrated and the condition for oscillation and the frequency of oscillation could separately be tuned electronically through tuning bias currents of the OTA.The result of computer simulation was in agreement with that of its theoretical analysis.

关 键 词：正弦振荡器 运算跨导放大器 零-镜元件 系统综合法 

分 类 号：TN751[电子电信—电路与系统]