Low-power, enhanced-gain adaptive-biasing-based Operational Transconductance Amplifiers

Author

Tuan Vu Cao ; Wisland, Dag T. ; Lande, Tor Sverre ; Moradi, Farshad

Author_Institution

Dept. of Inf., Univ. of Oslo, Oslo, Norway

fYear

2009

fDate

16-17 Nov. 2009

Firstpage

1

Lastpage

4

Abstract

A symmetrical PMOS OTA (Operational Transconductance Amplifier) is used to build an advanced rail-to-rail amplifier with improved DC-gain and reduced power consumption. By using the adaptive biasing circuit for two differential inputs, a low stand-by current can be achieved, reducing power consumption, while the DC-gain of the proposed OTA is improved by adding a partial feedback loop. Simulation shows that the OTA has a low static power consumption of 57.6 Â¿W and a high FoM of 5.13 [(V/Â¿s.pF)/Â¿W] for a load capacitor of 10 pF. The circuit is designed in a STM 90 nm CMOS process.

Keywords

CMOS analogue integrated circuits; MOSFET; feedback amplifiers; integrated circuit design; low-power electronics; operational amplifiers; DC-gain; STM CMOS process; adaptive biasing circuit; capacitance 10 pF; differential inputs; enhanced gain; load capacitor; low-power dissipation; operational transconductance amplifiers; partial feedback loop; power 57.6 muW; power consumption; rail-to-rail amplifier; size 90 nm; stand-by current; symmetrical PMOS OTA; CMOS process; Capacitors; Circuit simulation; Energy consumption; Feedback circuits; Feedback loop; Operational amplifiers; Power amplifiers; Rail to rail amplifiers; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

NORCHIP, 2009

Conference_Location

Trondheim

Print_ISBN

978-1-4244-4310-9

Electronic_ISBN

978-1-4244-4311-6

Type

conf

DOI

10.1109/NORCHP.2009.5397853

Filename

5397853