OTAs-based current-mode quadrature oscillator

Author

Kumngern, Montree ; Dejhan, Kobchai

Author_Institution

Telecommun. Eng. Dept., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok

fYear

2009

fDate

8-11 Feb. 2009

Firstpage

1

Lastpage

4

Abstract

A current-mode quadrature oscillator using two operational transconductance aTmplifiers (OTAs) and two grounded capacitors is presented. The circuit provides two high output impedance current sources with 90deg phase difference. The oscillation frequency can be controlled electronically by adjusting the bias current/voltage of OTAs. The proposed circuit employs only grounded capacitors and requires no resistors. The use of only grounded capacitors is ideal for IC implementation. The proposed structure is eminently suitable for implementation in both bipolar and CMOS technologies. The theoretical results are verified by PSpice simulation.

Keywords

SPICE; capacitors; operational amplifiers; oscillators; CMOS technologies; PSpice simulation; bipolar technologies; current mode quadrature oscillator; grounded capacitors; operational transconductance amplifiers; oscillation frequency; output impedance current sources; CMOS technology; Capacitors; Circuits; Filters; Frequency; Impedance; Oscillators; Resistors; Transconductance; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Signal Processing and Communications Systems, 2008. ISPACS 2008. International Symposium on

Conference_Location

Bangkok

Print_ISBN

978-1-4244-2564-8

Electronic_ISBN

978-1-4244-2565-5

Type

conf

DOI

10.1109/ISPACS.2009.4806769

Filename

4806769