A CMOS single stage fully differential folded cascode amplifier employing gain boosting technique

Author

Rahim, S. A Enche Ab ; Azmi, I.M.

Author_Institution

Adv. Phys. Technol. Lab., TM R&D Sdn. Bhd., Cyberjaya, Malaysia

fYear

2011

fDate

12-14 Dec. 2011

Firstpage

234

Lastpage

237

Abstract

In this paper, a single stage fully differential folded cascode amplifier using gain boosting technique is presented. The amplifier was initially designed for 12 bits 22 MSPS pipelined analog-to-digital converter (ADC). However, the amplifier alone could not provide a sufficient DC gain in order to meet the ADC requirement. In order to obtain higher DC gain, a gain boosting technique was employed for this op-amp. The amplifier was implemented in 0.13μm CMOS process technology. The simulation results show that this amplifier has a DC gain of 95dB, a unity gain bandwidth of 414 MHz and a phase margin of 82 degrees.

Keywords

CMOS analogue integrated circuits; analogue-digital conversion; differential amplifiers; operational amplifiers; ADC; CMOS process; CMOS single stage fully differential folded cascode amplifier; DC gain; gain boosting technique; operational amplifier; pipelined analog-digital converter; size 0.13 mum; Accuracy; Analog-digital conversion; Boosting; CMOS process; Gain; Operational amplifiers; Transistors; fully differential folded cascode amplifier; gain boosting techniques;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits (ISIC), 2011 13th International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-61284-863-1

Type

conf

DOI

10.1109/ISICir.2011.6131939

Filename

6131939