Title :
A low-voltage low-power rail-to-rail constant-Gm adaptive biased CMOS operational amplifier
Author :
Cardarilli, Gian-Carlo ; Ferri, Giuseppe ; Bordoni, Franco
Author_Institution :
Dipt. di Ingegneria Elettronica, Rome Univ., Italy
fDate :
6/20/1905 12:00:00 AM
Abstract :
In this paper, we present the design of a novel low voltage (1.8 V) low-power (230 μW) CMOS operational amplifier. It utilises the adaptive biased technique in order to minimize the quiescent power consumption of its input stage without degradation of the dynamic performance. A class-AB output stage allows current control. The op-amp has been designed with input and output full swing (rail-to-rail) and constant transconductance over the input common mode range. The DC gain is 73 dB. The gain bandwidth is 1.5 MHz (PM=77°) and the slew rate is greater than 15 V/μs, for a 100 pF/1 kΩ load. The minimum operating supply voltage is 1.5 V. The circuit performance has been compared with some literature solutions, showing much better characteristics
Keywords :
CMOS analogue integrated circuits; integrated circuit design; low-power electronics; operational amplifiers; 1.5 MHz; 1.5 to 1.8 V; 230 muW; 73 dB; CMOS operational amplifier; DC gain; adaptive biased technique; class-AB output stage; constant transconductance; gain bandwidth; input common mode range; low-power electronics; minimum operating supply voltage; quiescent power consumption; slew rate; Bandwidth; Current control; Degradation; Energy consumption; Gain; Low voltage; Operational amplifiers; Rail to rail inputs; Rail to rail outputs; Transconductance;
Conference_Titel :
Microelectronics, 1998. ICM '98. Proceedings of the Tenth International Conference on
Conference_Location :
Monastir
Print_ISBN :
0-7803-4969-5
DOI :
10.1109/ICM.1998.825556
