Title :
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
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;
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
DOI :
10.1109/ISCIT.2010.5664834
