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A Wideband LO Generator for 5G FR1 Bands Using a Single LC-VCO-Based Subsampling
一种基于单LC-VCO的5G FR1宽带LO生成器，采用子采样架构和数字校准技术实现低相位噪声。
65nm CMOS, 超低抖动, 覆盖5G FR1全频段
5G FR1LO生成器LC-VCO子采样PLL相位噪声
▸使用相位旋转分频器（PRD）降低PLL频率调谐范围至21%
▸采用个体延迟单元可控数字环路滤波器（IDC-DLF）校准失配并保证精确正交关系
▸结合子采样架构、DAC量化误差消除和数字预失真技术实现超低相位噪声
Abstract
In this work, an ultra-low -jitter wideband cascaded
local oscillation (LO) generator for 5G frequency range 1 (FR1)
is presented. Using the phase-rotating divider (PRD) of the
2nd-stage ring-oscillator-based frequency multiplier (RO-FM)
that can generate fractional multiplication factors ( Ms), the
required frequency-tuning range (FTR) of the 1st-stage phase-
locked loop (PLL) dramatically decreased to 21%, which can be
covered easily by a single low-phase-noise LC-voltage-controlled
oscillator