双环路电流模式正弦振荡器的CCⅡ实现  

Current mode sinusoidal oscillator with double loops implemented with CCⅡ

作　　者：李永安[1] 

机构地区：[1]咸阳师范学院物理学系,陕西咸阳712000

出　　处：《兰州理工大学学报》2008年第6期90-92,共3页Journal of Lanzhou University of Technology

摘　　要：为获得高频率、高精度、高稳定度和易集成的电流模式正弦振荡器,以基本RC网络的带通、低通特性为基础,利用3个CCⅡ设计双环路电流模式正弦振荡器,该电路的振荡频率大于2 MHz.振荡幅度与振荡频率可独立调节,振荡频率取决于电阻比,因而输出频率的精度高、稳定度高.一电容接地,另一电容"虚地",电路易集成.电路的频谱选择性较好.计算机仿真结果证明该滤波器正确有效.To get current-mode sinusoidal oscillator with high frequency, high accuracy, high stability and easy to be integrated, three CC Ⅱ s were employed to design the oscillator with double loops on the basis of bandpass and lowpass feature of the basic RC network. The frequency of the oscillator was greater than 2 MHz. The amplitude and frequency of the oscillator could be tuned independently. Since the frequency of oscillation is dependent on the resistance ratio, the oscillator exhibited high accuracy and high stability. Since one capacitor was earthed and another one was with virtual ground, the oscillator was easy to be in- tegrated. The oscillator had good selectivity. It was proved by computer simulation that the presented circuit was valid and effective.

关 键 词：正弦振荡器 双环路 电流模式 CCⅡ 

分 类 号：TN752[电子电信—电路与系统]