JSSC 2024第8期Clocking & PLLs65nmVCO

An Enhanced Class-F Dual-Core VCO With Common-Mode-Noise Self-Cancellation and I

提出一种增强型Class-F双核VCO，采用共模噪声自抵消和隔离技术，降低噪声并提升性能。

65nm CMOS, 11.5-14.3 GHz, -119.2 dBc/Hz PN, 192.8 dBc/Hz FoM, 5.6-10 mW

Class-F VCO共模噪声双核结构相位噪声CMOS

▸创新点1：共模噪声自抵消技术（CM-NC）是一种电路创新，通过使漏极线圈和附近源极线圈的共模噪声电流方向相反，产生的磁场相互抵消，从而减少电源和地节点注入的噪声，显著提升VCO的噪声性能。

▸创新点2：共模噪声隔离技术（CM-NI）是一种方法创新，利用两个电感之间的解耦原理，消除共模尾电感对差分模式的影响，进一步优化了VCO的噪声隔离效果。

▸创新点3：双核8字形电感结构是一种系统创新，通过独特的电感布局，在不增加面积的情况下改善了相位噪声（PN），相比传统分离式尾滤波电感方法具有更高的集成度和性能优势。

▸创新点4：双匝栅极线圈结构是一种电路创新，通过将栅极线圈绕制成双匝结构，使漏极电感到栅极的耦合噪声与栅极线圈的感应电流方向相反，从而切断漏极到栅极的噪声耦合路径，进一步提升了VCO的抗噪声能力。

Abstract

In this article, an enhanced class-F voltage- controlled oscillator (VCO) with common-mode-noise self-cancellation (CM-NC) and common-mode-noise isolation (CM-NI) technique is proposed. With the proposed CM-NC technique, the common-mode-noise current of the drain coil and that of the nearby source coil are in the opposite direction. Therefore, the magnetic fields generated by the two coils cancel each other, which reduces the noise injected into the VCO from power supply and the ground node. Mor