Title :
200 μW CMOS class AB unity-gain buffers with accurate quiescent current control
Author :
Lopez-Martin, Antonio J. ; Algueta, Jose M. ; Acosta, Lucia ; Carvajal, Ramon G. ; Ramirez-Angulo, Jaime
Author_Institution :
Dept. of Electr. & Electron. Eng., Public Univ. of Navarra, Pamplona, Spain
Abstract :
A new family of CMOS two-stage unity-gain buffers is presented, based on introducing Quasi-Floating Gate (QFG) techniques to achieve class AB operation. The resulting buffers feature simplicity, low supply voltage requirements, and low quiescent currents which are accurately set regardless of process, temperature, or supply variations. Measurement results for a 0.5 μm CMOS implementation of three class AB buffers powered at ±1.65 V show maximum output currents ranging from 64 to 92 times the quiescent currents and static power consumption below 200 μW.
Keywords :
CMOS integrated circuits; buffer circuits; low-power electronics; CMOS class AB unity-gain buffers; CMOS two-stage unity-gain buffers; accurate quiescent current control; power 200 muW; quasi-floating gate; size 0.5 mum; CMOS integrated circuits; Capacitance; Capacitors; Logic gates; Resistance; Strontium; Transistors; Analog integrated circuits; CMOS buffer; CMOS voltage follower; Quasi-Floating Gate;
Conference_Titel :
ESSCIRC, 2010 Proceedings of the
Conference_Location :
Seville
Print_ISBN :
978-1-4244-6662-7
DOI :
10.1109/ESSCIRC.2010.5619708
