Title :
A low-voltage CMOS class-AB operational amplifier
Author :
Vincence, V.C. ; -Montoro, C.G. ; Schneider, M.C.
Author_Institution :
Univ. Fed. de Santa Catarina - UFSC, Florianopolis, Brazil
Abstract :
This paper presents a CMOS low-voltage operational amplifier (opamp), which uses a minimum selector circuit to control the class AB operation of the output stage. The opamp basic characteristics are analyzed and simulated using the SMASH 4.0 simulator with the ACM model of the MOSFET. The supply voltage is 1.5 V and the total quiescent current is 4 μA for a unity-gain frequency of 1 MHz. The class AB opamp was designed to operate in a sample-hold of the switched-MOSFET technique (SM), supplying a load with RC characteristic.
Keywords :
CMOS analogue integrated circuits; circuit simulation; integrated circuit design; low-power electronics; operational amplifiers; 1 MHz; 1.5 V; 4 muA; ACM MOSFET model; CMOS low-voltage operational amplifier; RC characteristic load; SMASH 4.0 simulator; class AB operation; minimum selector circuit; opamp characteristics; output stage; sample-hold; supply voltage; switched-MOSFET technique; total quiescent current; unity-gain frequency; Analog circuits; Analytical models; Circuit analysis; Circuit simulation; Circuit topology; MOSFET circuits; Operational amplifiers; Samarium; Semiconductor device modeling; Voltage;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010296
