Quadrature oscillators using two CFOAs and four passive components

Two new quadrature sinusoidal oscillators using current-feedback operational amplifiers (CFOAs) as an active building block are proposed. The proposed circuits use two CFOAs with the minimum number of passive elements, namely two resistors and two grounded capacitors. The use of only grounded capacitors makes the proposed circuits ideal for integrated circuit implementation. Both proposed circuits offer the advantages of orthogonal control of the oscillation condition and oscillation frequency, availability of two quadrature sinusoidal voltage outputs and low active and passive sensitivity performances. The HSPICE simulation and experimental results are provided to demonstrate the theoretical analysis.

[1]  E. O. Gunes,et al.  On the realization of oscillators using state equations , 2002 .

[2]  Muhammad Taher Abuelma'atti,et al.  Novel RC oscillators using the current-feedback operational amplifier , 1996 .

[3]  C. Aldea,et al.  Grounded resistor controlled sinusoidal oscillator using CFOAs , 1997 .

[4]  Raj Senani,et al.  New CFOA-Based Single-Element-Controlled Sinusoidal Oscillators , 2006, IEEE Transactions on Instrumentation and Measurement.

[6]  Muhammad Taher Abuelma'atti,et al.  Novel CFOA-based sinusoidal oscillators , 1997 .

[7]  Kamil Vrba,et al.  New voltage-mode quadrature oscillator employing single DBTA and only grounded passive elements , 2009, IEICE Electron. Express.

[8]  Raj Senani,et al.  Single op-amp sinusoidal oscillators suitable for generation of very low frequencies , 1991 .

[9]  Kamil Vrba,et al.  New Double Current Controlled CFA (DCC–CFA) Based Voltage–Mode Oscillator with Independent Electronic Control of Oscillation Condition and Frequency , 2013 .

[10]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[11]  Anwar A. Khan,et al.  Novel RC sinusoidal oscillator using second-generation current conveyor , 2005, IEEE Transactions on Instrumentation and Measurement.

[12]  Worapong Tangsrirat,et al.  Single-resistance-controlled quadrature oscillator and universal biquad filter using CFOAs , 2009 .

[13]  Muhammad Taher Abuelma’ati.  Identification of a class of two CFOA-based sinusoidal RC oscillators , 2010 .

[14]  Raj Senani.  New Types of Sinewave Oscillators , 1985, IEEE Transactions on Instrumentation and Measurement.

[15]  Vinod Kumar Singh,et al.  Two new canonic single-CFOA oscillators with single resistor controls , 2005, IEEE Transactions on Circuits and Systems II: Express Briefs.

[16]  P ? ? ? ? ? ? ? % ? ? ? ? , 1991 .