A low-power low-voltage OTA-C sinusoidal oscillator with a large tuning range

Author

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

Author_Institution

Dept. Ingenieria Electron., Univ. de Huelva, Spain

Volume

52

Issue

2

fYear

2005

Firstpage

283

Lastpage

291

Abstract

A new operational transconductance amplifier and capacitor based sinusoidal voltage controlled oscillator is presented. The transconductor uses two cross-coupled class-AB pseudo-differential pairs biased by a flipped voltage follower, and it exhibits a wide transconductance range with low power consumption and high linearity. The oscillator has been fabricated in a standard 0.8-μm CMOS process. Experimental results show a frequency tuning range from 1 to 25 MHz. The amplitude is controlled by the transconductor nonlinear characteristic. The circuit is operated at 2-V supply voltage with only 1.58 mW of maximum quiescent power consumption.

Keywords

CMOS analogue integrated circuits; capacitors; circuit tuning; low-power electronics; operational amplifiers; oscillators; 0.8 micron; 1 to 25 MHz; 1.58 mW; 2 V; analog CMOS circuits; capacitor oscillators; class-AB linear transconductor; flipped voltage follower; frequency tuning range; low power consumption; operational transconductance amplifier; sinusoidal voltage controlled oscillator; transconductance range; transconductor nonlinear characteristic; CMOS process; Capacitors; Energy consumption; Linearity; Operational amplifiers; Transconductance; Transconductors; Tuning; Voltage; Voltage-controlled oscillators; Analog CMOS circuits; class-AB linear transconductor; flipped voltage follower (FVF); low power; low voltage; operational transconductance amplifier and capacitor (OTA-C) oscillators;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2004.841599

Filename

1393161