New low-power low-voltage differential class-AB OTA for SC circuits

Author

Carvajal, R.G. ; Galan, J. ; Ramirez-Angulo, J. ; Torralba, A.

Author_Institution

Departamento de Ingenieria Electronica, Univ. de Sevilla, Spain

Volume

1

fYear

2003

fDate

25-28 May 2003

Abstract

In this paper, a new differential class-AB operational transconductance amplifier (OTA) for SC circuits that operate with a supply voltage of less than two transistor threshold voltages are introduced. It makes use of a new class-AB pseudo differential pair to generate signal currents much larger than quiescent currents. The OTA has been designed to operate with a supply voltage of V_DD = 1.1 V, using a 0.35 μm CMOS technology. Simulation results for a load capacitance (C_L) of 1 pF show 15 MHz gain-bandwidth product with a quiescent power consumption of 7 μW.

Keywords

CMOS analogue integrated circuits; differential amplifiers; low-power electronics; operational amplifiers; switched capacitor networks; 0.35 micron; 1 pF; 1.1 V; 15 MHz; 7 muW; CMOS technology; SC circuits; class-AB OTA; class-AB pseudo differential pair; differential OTA; low-power OTA; low-voltage OTA; operational transconductance amplifier; Bandwidth; CMOS technology; Circuits; Differential amplifiers; Energy consumption; High power amplifiers; Operational amplifiers; Signal generators; Threshold voltage; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on

Print_ISBN

0-7803-7761-3

Type

conf

DOI

10.1109/ISCAS.2003.1205632

Filename

1205632