JSSC 2013第8期Clocking & PLLs65nmVCO

A 57.5–90.1-GHz Magnetically Tuned Multimode CMOS VCO Jun Yin and Howard C. Luong , Senior Member , IEEE

采用磁调谐多模CMOS VCO实现57.5-90.1GHz超宽频率调谐范围

65nm CMOS, 1.2V, 7-9mA, 41.1%调谐范围(57.5-90.1GHz), 相位噪声105.1-111.8dBc/Hz@10MHz

磁调谐VCO多模振荡器CMOS毫米波相位噪声

▸创新点1：磁调谐(MT)技术 - 该方法创新通过磁耦合系数调节实现频率调谐，避免了传统变容管调谐的非线性问题，显著提升了调谐线性度和相位噪声性能，在58-90.1GHz范围内实现41.1%的连续调谐。

▸创新点2：开关三重屏蔽变压器 - 该电路创新采用可重构屏蔽层结构动态改变初级/次级线圈磁耦合系数，通过模式切换实现双频段覆盖，芯片面积仅0.03mm²，在65nm CMOS工艺下达成184.2-192.2dBc/Hz的优异FoM。

▸创新点3：超宽频率调谐范围 - 该系统级创新整合MT技术与多模谐振，在毫米波频段(57.5-90.1GHz)实现41.1%的相对带宽，同时保持7-9mA@1.2V的低功耗，突破传统VCO带宽-相位噪声折衷限制。

▸创新点4：多模式协同优化 - 通过精确控制三重屏蔽层的开关状态，实现四种工作模式(58/72.2/80.5/90.1GHz)的无缝切换，各模式相位噪声均优于-105dBc/Hz@10MHz，展现卓越的频率适应性。

Abstract

This paper presents a magnetically tuned (MT) multimode VCO featuring an ultra wide frequency tuning range. A switched-triple-shielded tra nsformer is proposed to change the magnetic coupling coef ﬁcient between the primary and secondary coils in the transformer tank to greatly increase the frequency tuning range of the d ual-band VCO to cover the whole -band continuously. Fabricated in a 65-nm CMOS process, the MT-VCO measures a frequency tuning range of 41.1% from 57.5 t o9 0 . 1G H zw h i l ec o n s u m i n g7t o9m Aa t1 . 2 - Vs u p p l yw i t h chip area of 0.03 mm . The measured phase noises at 10-MHz offset from carrier frequencies of 58, 72.2, 80.5, and 90.1 GHz, are 107.4, 111.8, 107.8, and 105.1 dBc/Hz, respectively, which correspond to between 184.2 and 192.2 dBc/Hz.