A 2.4-to-5.3GHz Dual-Core CMOS VCO with Concentric 8-Shaped Coils

📋 论文概要

该论文提出了一种工作在2.4至5.3GHz的双核CMOS压控振荡器（VCO），采用同心8字形线圈结构，旨在实现低相位噪声、中等功耗和超过一个倍频程的宽调谐范围，满足蜂窝通信对高性能VCO的需求。通过双核耦合和创新的线圈布局，有效提升了相位噪声和调谐范围。

💡 主要创新点

• 采用同心8字形线圈布局，相比传统螺旋电感，具有更好的品质因数和更低的电磁耦合，有利于降低相位噪声。
• 提出双核VCO结构，通过两个VCO内核的耦合进一步增强相位噪声性能，同时保持较宽的调谐范围。

🏷 关键词

📄 原文摘要

now at Marvell, Pavia, Italy, 3 Ericsson Modems, Lund, Sweden 1 2 Despite recent attempts to relax the phase-noise demands on voltage-controlled oscillators (VCOs) for cellular communications [1], mainstream radios require harmonic VCOs capable of a very low phase noise with moderate power consumption, associated to a large tuning range (TR) and a high insensitivity to interfering signals. Ideally, the TR should be in excess of one octave, since this allows the easy synthesis of all frequencies below those directly generated by the VCOs via repeated frequency divisions by 2. At the same time, the oscillation spectrum should be affected as little as possible by spurious (common-mode) magnetic fields impinging on the inductor coil in the VCO tank. This is a crucial requirement in modern radios, where there are more PLLs active at the same time, and particularly when (non-contiguous) carrier aggregation is implemented, since in this case the signal bands may be very close to each other. I

👥 作者与机构

Luca Fanori1,2, Thomas Mattsson3, Pietro Andreani1,3

Lund University, Lund, Sweden,