Open AccessA three‐stage capacitor‐less low noise LDO regulator for DCO phase noise reduction
Author(s) -
Jeong Il,
Lee Junyong,
Bae Sunghyun,
Lee Minjae
Publication year - 2022
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12447
Subject(s) - low dropout regulator , phase noise , capacitor , cmos , noise (video) , noise reduction , physics , materials science , dropout voltage , electrical engineering , voltage regulator , control theory (sociology) , voltage , optoelectronics , engineering , acoustics , computer science , control (management) , image (mathematics) , artificial intelligence
A phase noise reduction technique is presented in a three‐stage capacitor‐less (CL) low dropout (LDO) regulator. This paper proposes a simple RC network that reduces the noise from both bias generation and inside the LDO. This LDO is applied to a conventional CMOS LC oscillator and achieved 3 dB reduction of phase noise at 1 MHz offset from 20 GHz output. The line and load regulations are, 90 μV/V and 0.013 μV/mA, and the output noise at 1 MHz is 6.6nV / Hz ${\rm{nV}}/\sqrt {{\rm{Hz}}} $ .