A higher-order Quadrature Sinusoidal Oscillator (QSO) topology using Current Differencing Buffered Amplifier (CDBA) as an active device is investigated. The proposed oscillator produces two sinusoidal variable frequency waveforms with 90° of phase shift and suitable for signal processing applications. An unambiguous electronic control in terms of a performance parameter of oscillator such as the condition of oscillation and frequency of oscillation can be successfully achieved by using grounded and virtually grounded passive components in our proposed quadrature oscillator design. To demonstrate the feasibility of the proposed quadrature circuit, both transient and frequency response outputs are well observed through PSPICE in which CDBA is integrated with 0.18 ​μm CMOS technology parameter. In addition, hardware verification is also executed using commercially accessible Current Feedback Operational Amplifier (CFOA) as IC AD844AN and standard passive components. The other performance analysis such as sensitivity, non-ideality effect, frequency stability, phase noise, temperature analysis and Monte-Carlo analysis are also discussed for the proposed structure. The layout of the proposed configurations is also observed using the Analog Design Environment (ADE) spectra tool provided by Cadence Virtuoso.

研究了使用电流差动缓冲放大器（CDBA）作为有源器件的高阶正交正弦振荡器（QSO）拓扑。拟议的振荡器产生两个具有90°相移的正弦可变频率波形，适用于信号处理应用。通过在我们提出的正交振荡器设计中使用接地的和实际上接地的无源元件，可以成功实现针对振荡器性能参数（如振荡条件和振荡频率）的明确电子控制。为了证明提出的正交电路的可行性，通过PSPICE可以很好地观察到瞬态和频率响应输出，其中CDBA与0.18μmCMOS技术参数集成在一起。此外，还可以使用市售的电流反馈运算放大器（CFOA）作为IC AD844AN和标准无源组件来执行硬件验证。对于所提出的结构，还讨论了其他性能分析，例如灵敏度，非理想效果，频率稳定性，相位噪声，温度分析和蒙特卡洛分析。使用Cadence Virtuoso提供的模拟设计环境（ADE）频谱工具也可以观察到建议配置的布局。