Title :
CMOS micro-power output stage for integrated voltage references
Author_Institution :
Qualcomm CDMA Technol., San Diego, CA, USA
fDate :
7/22/2004 12:00:00 AM
Abstract :
A CMOS micro-power, class-AB output stage with high current-drive capability for integrated voltage references is presented. A weak-inversion MOS translinear-loop ensures that the harmonic mean of the push and pull currents equals a constant bias current. It can source/sink 20 mA with only 15 μA quiescent current, thus achieving very high power efficiency. It operates from a 2.5 V power supply and is stable for capacitive loads up to 2 nF.
Keywords :
CMOS integrated circuits; differential amplifiers; operational amplifiers; 15 muA; 2 nF; 2.5 V; 20 mA; CMOS micropower output; class AB output stage; constant bias current; harmonic mean principle; high current drive; integrated voltage references; pull current; push current; quiescent current; weak inversion MOS translinear loop;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20045366
