Title :
A rail-to-rail constant-gm low-voltage CMOS operational transconductance amplifier
Author :
Ferri, Giuseppe ; Sansen, Willy
Author_Institution :
L´´Aquila Univ., Italy
fDate :
10/1/1997 12:00:00 AM
Abstract :
A new operational transconductance amplifier working with supply voltages down to 1.3 V has been realized in a standard 0.7-μm CMOS technology. A constant transconductance (within 6% of maximum variation) is ensured for the whole common-mode input range. The input transistors operate in weak inversion. The class AB output stage also has a full voltage swing. The circuit provides a 1.3-MHz gain bandwidth for a power consumption of 460 μW (Cload=15 pF) at a 1.5-V supply voltage
Keywords :
CMOS analogue integrated circuits; operational amplifiers; 0.7 micron; 1.3 MHz; 1.3 V; 460 muW; CMOS operational transconductance amplifier; class AB output stage; common-mode input range; rail-to-rail constant-transconductance low-voltage circuit; weak inversion; CMOS technology; Energy consumption; MOS devices; Operational amplifiers; Rail to rail amplifiers; Rail to rail inputs; Rail to rail operation; Tail; Threshold voltage; Transconductance;
Journal_Title :
Solid-State Circuits, IEEE Journal of
