TitleA 12-GHz Calibration-Free All-Digital PLL for FMCW Signal Generation With 78 MHz/mu s Chirp Slope and High Chirp Linearity
AuthorsShen, Zhengkun
Jiang, Haoyun
Li, Heyi
Zhang, Zherui
Yang, Fan
Liu, Junhua
Liao, Huailin
AffiliationPeking Univ, Inst Microelect, Beijing 100871, Peoples R China
KeywordsFRACTIONAL-N PLL
RADAR TRANSCEIVER
NONLINEARITY
OSCILLATOR
MODULATOR
LOOP
TDC
Issue DateDec-2020
PublisherIEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
AbstractA novel all-digital phase-locked loop (ADPLL) for fast and high-linear FMCW signal generation is presented in this paper. Fast chirp slope is enabled by two-point modulation (TPM) technique and ramp linearity distortion induced by digitally- controlled oscillator (DCO) is suppressed by wide loop bandwidth. A calibration-free retiming fractional frequency dividing (FFD) scheme based on digital phase interpolator (DPI) is proposed to suppress the Delta Sigma quantization noise and break the loop bandwidth limitation. A parasitic insensitive DPI is utilized in the retiming FFD scheme to achieve high-linear phase interpolation. A high frequency resolution DCO with 9.8-kHz/bit least significant bit (LSB) and a vernier time-to-digital convertor (TDC) with 2.3-ps time resolution are employed to further minimize the quantization noise. Implemented in 40-nm CMOS, the ADPLL prototype consumes 33.8 mW power and 0.32 mm(2) chip area. Measurement results show that 78 MHz/mu s maximum chirp slope is achieved with 167 kHz root-mean-square (RMS) frequency error. The minimum RMS frequency error is only 5.6 kHz when 300 MHz frequency is swept in 1 ms. The phase noise from 12.15 GHz carrier is-113.6 dBc/Hz at 1-MHz offset.
URIhttp://hdl.handle.net/20.500.11897/601280
ISSN1549-8328
DOI10.1109/TCSI.2020.3004363
IndexedSCI(E)
Appears in Collections:信息科学技术学院

Files in This Work
There are no files associated with this item.

Web of Science®



Checked on Last Week

Scopus®



Checked on Current Time

百度学术™



Checked on Current Time

Google Scholar™





License: See PKU IR operational policies.