@inproceedings{d6ac212eaa764750982066bc5540928a,
title = "Ring-VCO based low noise and low spur frequency synthesizer",
abstract = "This paper presents a low phase-noise phase locked loop (PLL) system with a Multi-Phase Over-Sampling Charge Pump (MPOSCP) for wireless applications. The low phase-noise frequency synthesizer reduces ripples and noise on the control voltage of the ring voltage-controlled oscillator (VCO) as a means to control in-band noise at the output of the PLL. An MPOSCP is proposed to perform multi-phase over-sampling control for the charge pump (CP) in locked state. The proposed frequency synthesizer was fabricated using the TSMC 90-nm CMOS process. The prototype occupies 0.046mm2 active area, the reference frequency is 27 MHz, and the output frequency is 432 MHz with the total power consumption of 7 mW. The PLL achieved phase noise below -100 dBc/Hz from 15 Hz to 100 kHz with the reference spurs below-48 dBc.",
keywords = "Frequency synthesizer, Low Phase-Noise PLL, Ring VCO",
author = "Liao, {Te Wen} and Su, {Jun Ren} and Chung-Chih Hung",
year = "2013",
month = sep,
day = "9",
doi = "10.1109/ISCAS.2013.6572228",
language = "English",
isbn = "9781467357609",
series = "Proceedings - IEEE International Symposium on Circuits and Systems",
pages = "1861--1864",
booktitle = "2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013",
note = "2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013 ; Conference date: 19-05-2013 Through 23-05-2013",
}