A simple sinusoidal quadrature oscillator using a single active element

Q3 Engineering
Suphaphorn Panikhom, A. Suksawad, Thitiporn Janda, A. Jantakun
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引用次数: 0

Abstract

This study describes a simple design for a single active element sinusoidal oscillator with a quadrature signal. A current conveyor transconductance amplifier (CCTA), a single resistor, and two grounded capacitors are used in the first circuit. The second circuit is improved by using a current-controlled current conveyor transconductance amplifier (CCCCTA) and two grounded capacitors without a passive resistor, which means the grounded capacitor is suitably implemented for the IC fabrication. The oscillation condition and frequency of both circuits can be controlled using the same method that concurrently adjusts the DC bias current and the resistance as well as the oscillation frequency can be independently adjusted by capacitances. The CCTA is achieved by cascading the integrated circuits (IC) AD844 and LM13700, made by Analog Devices Corporation and Texas Instruments, respectively, which are available for commercial purchase. The sinusoidal quadrature signals in the time-domain and frequency-domain can be shown with computer simulations and the results of experiments. The Monte Carlo Analysis is also utilized to examine the oscillation frequency with the influence of passive element tolerance errors. The predicted oscillation frequency has a standard variation of about 20.04 kHz, with a maximum frequency of approximately 346.89 kHz and a minimum frequency of approximately 259.09 kHz. In addition, the mean and median frequencies are 296.10 and 293.98 kHz, respectively. The results of this study indicate that computer simulation and experiment are similar to a theoretical analysis, making them suiTable for use in the teaching of electrical and electronic engineering
使用单个有源元件的简单正弦正交振荡器
本研究描述了一种具有正交信号的单有源正弦振荡器的简单设计。在第一个电路中使用了一个电流输送跨导放大器(CCTA)、一个电阻和两个接地电容器。第二个电路通过使用一个电流控制的电流输送跨导放大器(CCCCTA)和两个接地电容器而没有无源电阻来改进,这意味着接地电容器适合集成电路制造。采用同时调节直流偏置电流和电阻的方法控制两种电路的振荡条件和频率,通过电容独立调节振荡频率。CCTA是通过级联集成电路(IC) AD844和LM13700实现的,分别由Analog Devices Corporation和Texas Instruments制造,可供商业购买。正弦正交信号的时域和频域可以用计算机模拟和实验结果来表示。利用蒙特卡罗分析方法分析了无源元件公差误差对振动频率的影响。预测振荡频率的标准差约为20.04 kHz,最大频率约为346.89 kHz,最小频率约为259.09 kHz。平均频率为296.10 kHz,中位数频率为293.98 kHz。研究结果表明,计算机模拟和实验结果与理论分析结果相似,适合于电气电子工程教学
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
EUREKA: Physics and Engineering
EUREKA: Physics and Engineering Engineering-Engineering (all)
CiteScore
1.90
自引率
0.00%
发文量
78
审稿时长
12 weeks
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