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首页> 外文期刊>Circuits, Devices & Systems, IET >High-frequency log-domain current-mode multiphase sinusoidal oscillator
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High-frequency log-domain current-mode multiphase sinusoidal oscillator

机译：高频对数域电流模式多相正弦振荡器

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摘要

This study describes the design of a multiphase sinusoidal oscillator (MSO) based on log-domain filtering concept. The circuit is a direct realisation of a first-order differential equation for obtaining the inverting and non-inverting low-pass filters. Each low-pass filter comprises only a grounded capacitor and four transistors. The proposed MSO can be instantaneously controlled over a very wide frequency range by controlling the current for the oscillation frequency and oscillation condition which indicates the proposed MSO¿s suitability in high-frequency applications. A validated bipolar junction transistor (BJT) model is used in SPICE simulation operated from a single power supply as low as 2.5 V. The oscillation frequency is controlled over four decades of frequency. The total harmonic distortions for three phase (11.5 MHz) and four phase (7 MHz) are, respectively, obtained around 2.4 and 2.2% which enables them to be fully integrated in telecommunication systems. The power consumption is around 5.5 mW for 100 mA bias current. Moreover, experimental results of three-phase MSO are included.
机译：这项研究描述了基于对数域滤波概念的多相正弦振荡器（MSO）的设计。该电路是用于获得反相和同相低通滤波器的一阶微分方程的直接实现。每个低通滤波器仅包括一个接地电容器和四个晶体管。可以通过为振荡频率和振荡条件控制电流来在很宽的频率范围内瞬时控制拟议的MSO，这表明拟议的MSO在高频应用中的适用性。在经过低至2.5 V的单电源供电的SPICE仿真中，使用了经过验证的双极结型晶体管（BJT）模型。振荡频率可控制四十倍的频率。分别获得了三相（11.5 MHz）和四相（7 MHz）的总谐波失真，分别约为2.4％和2.2％，这使它们可以完全集成到电信系统中。 100 mA偏置电流的功耗约为5.5 mW。此外，还包括三相MSO的实验结果。

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