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JSSC 2019第12期Power Management28nmPLL

A Self-Calibrated 16-GHz Subsampling-PLL-Based Fast-Chirp FMCW Modulator With 15

一种基于自校准16GHz子采样PLL的快速啁啾FMCW调制器，用于雷达应用。
28nm CMOS, 1.5GHz带宽, 10µs啁啾时间, 230kHz RMS频率误差
FMCW调制器子采样PLL两点调制DTC自校准
▸采用两点调制技术实现快速啁啾操作
▸基于DTC的子采样PLL消除分频器功耗和噪声
▸FM调制器具有更精细的环路时间分辨率，降低量化噪声并提高啁啾FM精度
Abstract
This article presents a 16-GHz frequency- modulated continuous-waveform (FMCW) modulator for radar applications in 28-nm CMOS. A two-point modulation technique is applied to reach a fast-chirp operation. A digital-to-time converter (DTC)-based subsampling phase-locked loop (PLL) is implemented to eliminate the power and noise from the frequency divider. Compared with the conventional delta–sigma division ratio-modulated PLL, this article presents an FM modulator with a finer loop-time resolution