Current differencing transconductance amplifier based current-mode quadrature oscillator using grounded capacitors

Author

Bumrongchoke, Tosapol ; Duangmalai, Danupat ; Jaikla, Winai

Author_Institution

Dept. of Electron., Nakhonphanom Univ., Mung, Thailand

fYear

2010

Firstpage

192

Lastpage

195

Abstract

A current-mode quadrature oscillator using single current differencing transconductance amplifier (CDTA), 1 resistor and 2 grounded capacitors is presented. The proposed oscillator can provide 2 sinusoidal output currents with 90° phase difference. The oscillation condition and oscillation frequency can be controlled electronically by adjusting the bias current of the CDTA. High output impedances of the configuration enable the circuit to be cascaded without additional current buffers. The use of only grounded capacitors is ideal for integration. The circuit performances are depicted through PSpice simulations, they show good agreement to theoretical anticipation.

Keywords

SPICE; amplifiers; circuit simulation; current-mode circuits; oscillators; CDTA; PSpice simulations; current differencing transconductance amplifier; current-mode quadrature oscillator; grounded capacitors; oscillation condition; oscillation frequency; sinusoidal output currents; Capacitors; Integrated circuit modeling; Oscillators; Resistors; SPICE; Simulation; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Information Technologies (ISCIT), 2010 International Symposium on

Conference_Location

Tokyo

Print_ISBN

978-1-4244-7007-5

Electronic_ISBN

978-1-4244-7009-9

Type

conf

DOI

10.1109/ISCIT.2010.5664834

Filename

5664834