Title :
Electronically Tunable Four Phase Quadrature Oscillator Employing Current-Controlled Current Conveyor Transconductance Amplifiers
Author :
Tanaphatsiri, Chaiya ; Jaikla, Winai
Author_Institution :
Program in Electron. & Telecommun. Eng., RMUTSV, Songkhla, Thailand
Abstract :
A current-mode four-phase quadrature oscillator using 2 current controlled current conveyor transconductance amplifiers (CCCCTAs) and 2 grounded capacitors is presented. The proposed oscillator can provide 4 sinusoidal output currents with 90° phase difference. The oscillation condition and oscillation frequency can be electronically/independently controlled by adjusting the bias current of the CCCCTA. 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 PSpice simulation results are depicted. The given results agree well with the theoretical anticipation.
Keywords :
capacitors; current conveyors; operational amplifiers; oscillators; PSpice simulation; current-controlled current conveyor transconductance amplifiers; current-mode four-phase quadrature oscillator; electronically tunable four phase quadrature oscillator; grounded capacitors; Capacitors; Frequency control; Integrated circuit modeling; Oscillators; Resistors; Simulation; Transconductance; CCCCTA; current-mode; oscillator;
Conference_Titel :
Electronic Design, Test and Application (DELTA), 2011 Sixth IEEE International Symposium on
Conference_Location :
Queenstown
Print_ISBN :
978-1-4244-9357-9
DOI :
10.1109/DELTA.2011.25
