Open AccessHigh swing PLL charge pump with current mismatch reduction
Author(s) -
Joram N.,
Wolf R.,
Ellinger F.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2014.0804
Subject(s) - charge pump , swing , current (fluid) , phase locked loop , reduction (mathematics) , materials science , voltage , optoelectronics , electrical engineering , control theory (sociology) , electronic engineering , physics , computer science , engineering , capacitor , jitter , acoustics , mathematics , control (management) , artificial intelligence , geometry
A compensated charge pump for use in phase‐locked loops (PLLs) is presented, which reaches several of the desired design goals for this type of circuit. The measured mismatch between the source and sink currents is below 2.1% for a large output voltage headroom of 83.3% of the supply, while still having a high output resistance of 140 kΩ. This behaviour is reached with a novel dual compensation method. The circuit was implemented in a 180 nm CMOS technology using a 3 V supply.