Title :
Comparative study of two CMOS operational amplifiers for high performance pipelined ADC
Author :
Dendouga, Abdelghani ; Oussalah, Slimane
Author_Institution :
Div. Microelectron. et Nanotechnol., Centre de Dev. des Technol. Av., Algiers, Algeria
Abstract :
This paper explains the choices taken for the design of two full differential operational amplifiers (Op-Amps). These Op-Amps have been designed for a MDAC (Multiplying Digital-to-.Analog Converter) stage of a pipelined ADC (Analog to Digital Converter). It shows also the solutions found to reach high gain, wide bandwidth and short settling time, without degrading too much the output swing. First the Op-Amp specifications are extracted starting from the ADC architecture, the two structures tested are then presented and the motivations of the final topology choice are shown. It presents then the op amp schematic implementation, the simulation results with the 180nm TSMC design kit.
Keywords :
CMOS integrated circuits; analogue-digital conversion; differential amplifiers; digital-analogue conversion; operational amplifiers; CMOS operational amplifier; MDAC; TSMC design kit; complementary metal oxide semiconductor; differential op-amp; high performance pipelined ADC; multiplying digital-to-analog converter; output swing; size 180 nm; Analog-digital conversion; CMOS integrated circuits; Capacitors; Computer architecture; Operational amplifiers; Pipelines; Topology; CMOS analog circuit design; Multiplying Digital-to-. Analog Converter; Op-Amps; piplined ADC;
Conference_Titel :
Design & Technology of Integrated Systems in Nanoscale Era (DTIS), 2015 10th International Conference on
Conference_Location :
Naples
DOI :
10.1109/DTIS.2015.7127348
