A programmable-bandwidth amplifier for ultra-low-power switched-capacitor application

Author

Yeknami, Ali Fazli ; Osgooei, Mostafa Savadi ; Alvandpour, Atila

Author_Institution

Dept. of Electr. Eng., Linkoping Univ., Linköping, Sweden

fYear

2011

Firstpage

761

Lastpage

764

Abstract

This paper presents a novel approach to design a programmable-bandwidth amplifier intended for ultra-low-power switched-capacitor application. The proposed topology is based on the common load-compensated two-stage OTA. The GBW is enhanced by replicating the second amplifying stage. Implemented in a 65-nm CMOS technology and approved by the post-layout simulation, the GBW is programmed in three operation modes (400, 700, and 900 kHz), while 52-dB DC gain is preserved in a 5-pF load. The OTA consumes 275-nW static power in a 400 kHz unity-gain frequency and 375-nW static power in a 900 kHz unity-gain frequency from 0.9-V supply.

Keywords

CMOS integrated circuits; amplifiers; low-power electronics; network topology; switched capacitor networks; CMOS technology; GBW; frequency 400 kHz; frequency 700 kHz; frequency 900 kHz; gain 52 dB; load-compensated two-stage OTA; power 275 nW; power 375 nW; programmable-bandwidth amplifier; size 65 nm; topology; ultra-low-power switched-capacitor application; voltage 0.9 V; Bandwidth; CMOS integrated circuits; Capacitance; Power demand; Switching circuits; Topology; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuit Theory and Design (ECCTD), 2011 20th European Conference on

Conference_Location

Linkoping

Print_ISBN

978-1-4577-0617-2

Electronic_ISBN

978-1-4577-0616-5

Type

conf

DOI

10.1109/ECCTD.2011.6043849

Filename

6043849