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JSSC 2023第10期Clocking & PLLs65nmVCO

A Compact and Low Phase Noise Square-Geometry Quad-Core Class-F VCO Using Parall

提出一种紧凑低相位噪声的19GHz方形几何四核Class-F VCO,采用电感共享技术。
17.6-19.4GHz, -137.2dBc/Hz@10MHz, 46mW, 0.9V, FoM 186.1dBc/Hz
压控振荡器低相位噪声方形几何电感共享Class-F
创新点1:方形几何变压器谐振腔的设计方法创新,通过采用方形几何结构替代传统的星形、双排或圆形几何结构,显著减小了芯片面积(0.3×0.3 mm²),同时保持了低相位噪声性能(-137.2 dBc/Hz @10MHz)。
创新点2:电感共享技术的电路创新,通过合并相邻电感器减少元件数量,进一步优化芯片面积,实现了四核VCO中同类频率下最小的核心面积,且无需额外功耗(46 mW @0.9V)。
创新点3:四核Class-F拓扑结构的系统创新,利用谐波频率阻抗增强和Class-F操作提升相位噪声性能(FoM达186.1 dBc/Hz),同时支持多核协同工作,兼顾能效与高频稳定性(17.6-19.4 GHz调谐范围)。
创新点4:综合性能指标的突破,通过上述技术组合实现FoM A达196.5 dBc/Hz,为同类四核VCO中面积与噪声性能的最佳平衡。
Abstract
This article introduces a compact and low phase noise (PN) 19-GHz quad-core class-F voltage-controlled oscillator (VCO) based on a square-geometry transformer tank using the inductor-sharing technique. The proposed square-geometry transformer tank is inherently more compact than the prevalent topologies such as star geometry, dual-row geometry, and circular geometry. The inductor-sharing technique is introduced to merge neighboring inductors into smaller ones, which further reduces the chip area