在DCO中振荡频率随振荡幅度的变化

2010 IEEE International Conference of Electron Devices and Solid-State Circuits (EDSSC) Pub Date : 2010-12-01 DOI:10.1109/EDSSC.2010.5713724

Sang-Sun Yoo, Jeong-Ho Park, Hong-Joo Song, Hyung-Joun Yoo

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引用次数: 1

摘要

在DCO中，振荡频率可以通过大的振荡幅度连续改变。振荡幅度的影响对任何具有陡峭的C-V特性的振荡器都有效。该效应在DCO中是至关重要的，因为它需要非常小的电容控制。为了验证振荡效果，分别测量了具有振荡幅值的DCO中的对耦合对和分离的对耦合对。因此，在较大的振荡幅度下，单元调谐频率的极性甚至可以反转。虽然分离对的控制电压增加了电容，但DCO的振荡频率增加了，这与预期不同。这意味着DCO的有效电容随振荡幅度的减小而减小。本文对这一效应进行了分析，并用有效电容对其进行了解释。

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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The variations of osillation freqeuncy according to the oscillation amplitudes in DCO

In DCO, oscillation frequency can be continuously changed by large oscillation amplitudes. The effect of oscillation amplitude is valid for any oscillator with steep C-V characteristic. The effect is critical in DCO because it needs very small capacitance control. For verifying the oscillation effect, an opposite-coupled pair in DCO with oscillation amplitude and a separated opposite-coupled pair are measured, respectively. As the result, the polarity of unit tuning frequency can be even inverted at large oscillation amplitude. Although capacitance is increased by control voltage in the separated pair, the oscillation frequency of DCO is increased, which differs from an expectation. This means that the effective capacitance of DCO is decreased by oscillation amplitude. This paper analyzes this effect and explains it with the effective capacitance.

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2010 IEEE International Conference of Electron Devices and Solid-State Circuits (EDSSC)

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