This study introduces a new approach for realising a sinusoidal oscillator with three outputs, using an active-resistor-capacitor (RC) approach. Using the proposed approach, a new circuit employing three current feedback operational amplifiers and passive components is further introduced. The circuit employs two grounded capacitors and four resistors, out of which one is grounded. The new circuit based on the proposed generalised approach is relatively insensitive to the parasitic effects of active elements, and easy to design, by way of non-interaction of frequency and condition of oscillations. The proposed approach and the new proposed circuit provide three outputs, two of which are at low impedance nodes. The proposed generalised approach and the new circuit are verified through simulation and experimental results, using commercially available AD-844s integrated circuits and passive components. Thus, the work advances the existing knowledge on the active-RC oscillator design.

中文翻译：

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具有接地电容器的有源RC正交振荡器电路的通用方法

这项研究介绍了一种使用有源电阻电容（RC）方法实现具有三个输出的正弦振荡器的新方法。使用提出的方法，进一步介绍了一种采用三个电流反馈运算放大器和无源元件的新电路。该电路使用两个接地电容器和四个电阻器，其中一个接地。基于提出的通用方法的新电路对有源元件的寄生效应相对不敏感，并且通过频率和振荡条件的不相互作用，易于设计。所提出的方法和新提出的电路提供三个输出，其中两个处于低阻抗节点。通过仿真和实验结果验证了所提出的通用方法和新电路，使用市售的AD-844s集成电路和无源元件。因此，这项工作推动了有关有源RC振荡器设计的现有知识。