An ultra-low-voltage ultra-low-power OTA with improved gain-bandwidth product

Author

Razzaghpour, Milad ; Golmakani, Abbas

Author_Institution

Electr. Eng. Fac., Sadjad Univ. Mashhad, Mashhad, Iran

fYear

2008

fDate

14-17 Dec. 2008

Firstpage

39

Lastpage

42

Abstract

A 0.5-V ultra-low-power improved operational transconductance amplifier (OTA) using the transistors operate in weak inversion is presented in this paper. The proposed topology based on a bulk-driven input differential pair employed a gain-stage in the Miller capacitor feedback path to improve the Â¿pole-splittingÂ¿ effect. Simulations in a standard 0.18 Â¿m CMOS process resulted on rail-to-rail input and output swings, considerable enhancement in unity-gain bandwidth and also the DC gain with the power consumption of only 1.02 Â¿W.

Keywords

circuit feedback; differential amplifiers; low-power electronics; network topology; operational amplifiers; Miller capacitor feedback path; bulk-driven input differential pair; gain-bandwidth product; operational transconductance amplifier; power 1.02 muW; size 0.18 mum; ultra low-voltage ultra low-power OTA; voltage 0.5 V; weak inversion; Bandwidth; CMOS process; Capacitors; Circuits; Feedback; Frequency; Operational amplifiers; Power supplies; Resistors; Transconductance; Bulk-driven differential pair; Miller compensation; full swing; operational transconductance amplifier (OTA); right half-plane zero control; ultra-low-power; ultra-low-voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics, 2008. ICM 2008. International Conference on

Conference_Location

Sharjah

Print_ISBN

978-1-4244-2369-9

Electronic_ISBN

978-1-4244-2370-5

Type

conf

DOI

10.1109/ICM.2008.5393821

Filename

5393821