Open AccessPower‐efficient class‐AB telescopic cascode opamp
Author(s) -
Garde M.P.,
LopezMartin A.J.,
RamirezAngulo J.
Publication year - 2018
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/el.2018.0771
Subject(s) - micropower , cascode , slew rate , operational amplifier , cmos , electronic engineering , transconductance , electrical engineering , computer science , transistor , engineering , power (physics) , voltage , amplifier , physics , quantum mechanics
A micropower telescopic cascode opamp is described. It employs an adaptive bias current source to obtain class‐AB operation and dynamic biasing of the cascode transistors to improve output swing and common‐mode rejection ratio (CMRR), and to avoid slew rate degradation. Measurement results for a 0.5 μm CMOS test chip prototype validate the proposal.