Title :
Low voltage gain boosting schemes for one stage operational amplifiers
Author :
Ramirez-Angulo, Jaime ; Garimella, Annajirao ; Kalyani-Garimella, Lalitha M. ; Sawant, Milind ; Lopez-Martin, Antonio ; Carvajal, R.G.
Author_Institution :
Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA
Abstract :
Two simple schemes for boosting significantly the open loop gain of one stage op-amps without essential degradation of the phase margin are discussed. These are based on low voltage active current mirrors using multiple cascoded auxiliary amplifiers to achieve extremely high output resistance. Post-layout simulations show that open loop gain greater than 300 dB with phase margin greater 60° can be achieved in 0.5 μm CMOS technology.
Keywords :
CMOS integrated circuits; low-power electronics; open loop systems; operational amplifiers; CMOS technology; low voltage active current mirrors; low voltage gain boosting schemes; multiple cascoded auxiliary amplifiers; open loop gain; operational amplifiers; output resistance; phase margin; post-layout simulations; stage op-amps; Boosting; CMOS technology; Degradation; Dynamic range; Feedback loop; Low voltage; Mirrors; Operational amplifiers; Output feedback; Performance gain;
Conference_Titel :
Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-1341-6
DOI :
10.1109/ECCTD.2007.4529650
