Lin, Chun-MingChun-MingLinKao, Kun-YaoKun-YaoKaoKUN-YOU LIN2021-05-052021-05-052018https://www.scopus.com/inward/record.url?eid=2-s2.0-85061801421&partnerID=40&md5=914e095052a6d2eda9fb7fc6690c07abhttps://scholars.lib.ntu.edu.tw/handle/123456789/559085An integrated wide tuning range, low phase noise and high frequency resolution digitally controlled oscillator (DCO) in 90 nm CMOS technology for software-defined radio (SDR) frequency synthesizers is presented. The switched-capacitor equipped with fine frequency resolution and tail noise filtering techniques are adopted to achieve a wide frequency range from 8.14-11.90 GHz with power consumption varying from 9.4-24.5 mA under 1-V supply. The measured phase noise is -108.4 to -115.4 dBc/Hz at 1-MHz offset. Furthermore, a design technique what we term as Ceq-Ctune diagram and the methodology for designing wide tuning range and low phase noise oscillator in single core are also presented.Digitally controlled oscillatorFrequency resolutionLow phase noiseSwitched-capacitor arrayWide tuning range[SDGs]SDG7conference paper10.23919/APMC.2018.86176052-s2.0-85061801421