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

fYear

2015

fDate

21-23 April 2015

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Design & Technology of Integrated Systems in Nanoscale Era (DTIS), 2015 10th International Conference on

Conference_Location

Naples

Type

conf

DOI

10.1109/DTIS.2015.7127348

Filename

7127348