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Electronically Tunable Four Phase Quadrature Oscillator Employing Current-Controlled Current Conveyor Transconductance Amplifiers

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2 Author(s)
Tanaphatsiri, C. ; Program in Electron. & Telecommun. Eng., RMUTSV, Songkhla, Thailand ; Jaikla, W.

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.

Published in:

Electronic Design, Test and Application (DELTA), 2011 Sixth IEEE International Symposium on

Date of Conference:

17-19 Jan. 2011