Title :
Low-voltage micropower super class AB CMOS OTA
Author :
Baswa, S. ; López-Martín, A.J. ; Ramírez-Angulo, J. ; Carvajal, R.G.
Author_Institution :
Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA
Abstract :
Novel class AB OTA topologies result from the combined use of local common-mode feedback and class AB input stages. They can operate at low supply voltage and feature very low static power consumption, bandwidth enhancement, and very high slew rate. Measurement results of a 0.5 μm CMOS prototype show slew rate and unity-gain bandwidth enhancement factors of 180 and 4.5, respectively, compared to a conventional one-stage OTA.
Keywords :
CMOS analogue integrated circuits; feedback amplifiers; integrated circuit design; low-power electronics; network topology; operational amplifiers; power amplifiers; power consumption; 0.5 micron; CMOS prototype; bandwidth enhancement; common-mode feedback; conventional one-stage OTA; low-voltage micropower super class AB CMOS OTA; novel class AB OTA topologies; operational transconductance amplifier; slew rate; static power consumption; unity-gain;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20040166
