11 GHz UGBW Op-amp with feed-forward compensation technique

Author

Shrimali, Hitesh ; Chatterjee, Shouri

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., Delhi, India

fYear

2011

fDate

15-18 May 2011

Firstpage

17

Lastpage

20

Abstract

A high speed pseudo differential three stage operational amplifier has been implemented using a feed-forward compensation technique in a standard 0.13 μm CMOS technology. The three stage inverter based op-amp with feed-forward compensation achieves 11 GHz of unity gain bandwidth for a nominal power consumption 18 mW, and exhibits 39 dB of DC gain with phase margin of 62° when driving a differential load of (2×300 fF) at a 1.2 V power supply voltage. At a power supply voltage as low as 0.4 V, the same circuit consumes 0.1 mW and achieves 79 MHz of unity gain bandwidth. The proposed op-amp achieves a figure of merit (FOM) [1] of 440 at 1.2 V, and 190 at 0.4 V.

Keywords

CMOS analogue integrated circuits; differential amplifiers; feedforward amplifiers; invertors; microwave amplifiers; operational amplifiers; CMOS technology; DC gain; FOM; UGBW op-amp; bandwidth 11 GHz; bandwidth 79 MHz; feedforward compensation technique; figure of merit; gain 39 dB; high speed pseudo differential three stage operational amplifier; power 0.1 mW; power 18 mW; power consumption; power supply voltage; size 0.13 mum; three stage inverter; unity gain bandwidth; voltage 0.4 V; voltage 1.2 V; Bandwidth; CMOS integrated circuits; CMOS technology; Robustness;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2011 IEEE International Symposium on

Conference_Location

Rio de Janeiro

ISSN

0271-4302

Print_ISBN

978-1-4244-9473-6

Electronic_ISBN

0271-4302

Type

conf

DOI

10.1109/ISCAS.2011.5937490

Filename

5937490