采用vdta和接地电容的电流型三阶正交振荡器

The 4th Joint International Conference on Information and Communication Technology, Electronic and Electrical Engineering (JICTEE) Pub Date : 2014-03-05 DOI:10.1109/JICTEE.2014.6804103

P. Phatsornsiri, P. Lamun, M. Kumngern, U. Torteanchai

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引用次数: 22

摘要

提出了一种基于电压差跨导放大器(VDTA)的电子可调谐电流型三阶正交振荡器。该振荡器采用两个vdta和三个接地电容构成，有利于集成电路的实现。该电路从高输出阻抗端子提供两个相位差为90°的电流输出。通过调节vdta的偏置电流，可以实现振荡条件和振荡频率的电子调谐。对该电路进行了灵敏度研究。采用0.35 μm TSMC CMOS工艺参数进行了PSPICE仿真，验证了理论分析。

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Current-mode third-order quadrature oscillator using VDTAs and grounded capacitors

This paper presents a novel electronically tunable current-mode third-order quadrature oscillator based on voltage differencing transconductance amplifier (VDTA). The proposed oscillator is constructed using two VDTAs and three grounded capacitors, which is advantageous for integrated circuit implementation. The circuit provides two current outputs with 90° phase difference from high output impedance terminals. The condition of oscillation and the frequency of oscillation can be electronically tuned by adjusting the bias current of the VDTAs. The sensitivity studies of the circuit have been carried out. PSPICE simulations with 0.35 μm TSMC CMOS process parameters are given to confirm the theoretical analysis.

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The 4th Joint International Conference on Information and Communication Technology, Electronic and Electrical Engineering (JICTEE)

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