Title :
Design of low voltage low power CMOS OP-AMPS with rail-to-rail input/output swing
Author :
Gopalaiah, S.V. ; Shivaprasad, A.P. ; Panigrahi, Sukanta K.
Author_Institution :
Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
A novel input and output biasing circuit to extend the input common mode (CM) voltage range and the output swing to rail-to-rail in a low voltage op-amp in standard CMOS technology is presented. The input biasing circuit uses a Switched Capacitor Based Attenuator (SCBA) approach to establish rail-to-rail common mode input voltage range. And the output biasing circuit uses an Output Driver (OD), with floating bias to give the rail-to-rail swing at output stage. Three different OD schemes in operational amplifier have been proposed and tested the performance with SCBA. The simulation results justify the theoretical analysis.
Keywords :
CMOS integrated circuits; attenuators; driver circuits; integrated circuit technology; low-power electronics; operational amplifiers; switched capacitor networks; CMOS technology; complementary metal oxide semiconductor design; floating bias; input biasing circuit; input common mode voltage range; low voltage low power CMOS OP-AMPS design; operational amplifiers design; output biasing circuit; output driver; rail-to-rail common mode input voltage range; rail-to-rail input/output swing; switched capacitor based attenuator; Attenuators; CMOS technology; Circuit testing; Driver circuits; Low voltage; Operational amplifiers; Rail to rail inputs; Rail to rail outputs; Switched capacitor circuits; Switching circuits;
Conference_Titel :
VLSI Design, 2004. Proceedings. 17th International Conference on
Print_ISBN :
0-7695-2072-3
DOI :
10.1109/ICVD.2004.1260903
