Design of a sub-1-V low dropout regulator for supply-regulated active-loop-filter VCOs

Author

Young-Min Jang ; Ji-Geun Kim ; Jae-Hyun Cho ; Kim, Bruce C. ; Sang-Bock Cho

Author_Institution

Dept. of Electron. Eng., Univ. of Ulsan, Ulsan, South Korea

fYear

2014

Firstpage

240

Lastpage

241

Abstract

Full-swing voltage-controlled oscillators (VCOs) are very sensitive to supply noises and require supply regulators with increased supply voltages, which may entail more power consumption. Further, in a phase-locked loop (PLL) with a conventional second-order passive-loop filter (PLF), PLL output frequency range is restricted by the compliance range of the charge pump output voltage (V cp) even though supply-regulated vCos (SR-VCO) can provide a wider frequency range. In order to solve these problems, V Cp be separated from the V CTRL using the low dropout regulator (LDO). This paper proposes a low dropout regulator of O.83V with bandgap references (BGR) ofO.62V output voltage in supply-regulated active-loop filter vCos (SR-ALF-VCO).

Keywords

active filters; charge pump circuits; passive filters; phase locked loops; voltage-controlled oscillators; BGR; LDO; PLF; PLL; SR-ALF-VCO; bandgap reference; charge pump output voltage; full-swing voltage-controlled oscillator; low dropout regulator; phase-locked loop; power consumption; second-order passive-loop filter; supply-regulated active-loop-filter VCO; voltage 0.62 V; voltage 0.83 V; voltage 1 V; Electronic publishing; Information services; Internet; Internet of things (IoT); RF/PMIC; active-loop filter (ALF); low dropout regulator (LDO); voltage-controlled oscillator (VCO);

fLanguage

English

Publisher

ieee

Conference_Titel

SoC Design Conference (ISOCC), 2014 International

Type

conf

DOI

10.1109/ISOCC.2014.7087626

Filename

7087626