Electronically Tunable Third-Order Quadrature Oscillator Using CDTAs
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A current/voltage-mode third-order quadrature oscillator based on current differencing transconductance amplifiers (CDTAs) is presented in this paper. Outputs of two current-mode and two voltage-mode sinusoids each with 90o phase difference are available in the quadrature oscillator circuit. The oscillation condition and oscillation frequency are independently controllable. The proposed circuit employs only grounded capacitors and is ideal for integration. Simulation results are included to confirm the theoretical analysis.
KeywordsCurrent differencing transconductance amplifiers, quadrature oscillator, current-mode, voltage-mode, active circuit
Document typePeer reviewed
Document versionFinal PDF
SourceRadioengineering. 2010, vol. 19, č. 2, s. 326-330. ISSN 1210-2512
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