Wide Tuning Range Quadrature VCO Using Coupled Multivibrators

• Autorzy: Filanovsky, I. M. , Oliveira, L. B. , Fernandes, J. R.
• Języki publikacji: EN

Abstrakty

EN

Two emitter-coupled multivibrators are coupled to produce a quadrature current-/voltage controlled oscillator with wide frequency tuning range (which can be wider than one decade). The tuning range, the achievable frequency of oscillation, and the synchronization transients are investigated by simulation. The influence of mismatches of timing capacitors and charging currents on synchronization is also investigated. The results of simulations for different couplings show that one can find a design with low quadrature error, low phase noise and wide tuning range. This confirms the potential of the proposed VCO for RJF applications.

Słowa kluczowe

PL

oscylatory RC; oscylatory VCO; oscylator przestrajany napięciem; zakres przestrajania

EN

emitter-coupled multivibrators; quadrature VCO oscillators; wide tuning range; RC Oscillators

• Czasopismo: Electronics and Telecommunications Quarterly
• Rocznik: 2009
• Tom: Vol. 55, No 4
• Strony: 601-616
• Opis fizyczny: Bibliogr. 7 poz., tab., wykr.

Twórcy

autor

Filanovsky, I. M.

autor

Oliveira, L. B.

autor

Fernandes, J. R.

• University of Alberta, Edmonton, Alberta, Canada,

Bibliografia

• 1. P. R. Gray, P. J. Hurst, S. H. Lewis, and R. G. Meyer: Analysis and Design of Analog Integrated Circuits, 4th ed., J. Wiley, New York, 2007.
• 2. Buonomo, A. Lo Schiavo: Analysis of Emitter (Source)-Coupled Multivibrators, IEEE Trans. Circuits and Systems-I, vol. 53, no. 6, pp. 1193-1202, 2006.
• 3. I. M. Filanovsky, C. J. M. Verhoeven: Sinusoidal and Relaxation Oscillations in Source-Coupled Multivibrators, IEEE Trans. Circuits and Systems-II, vol. 54, no. 11, pp. 1009-10013, 2007.
• 4. C. I. M. Verhoeven: A High-Frequency Electronically Tunable Quadrature Oscillator, IEEE J. Solid-State Circuits, vol. 27, no. 7, pp. 1097-1100, 1992.
• 5. B. Gilbert: A Versatile Monolithic Voltage-to-Frequency converter, IEEE J. Solid-State Circuits, vol. SC-11, no. 6, pp. 852-864, 1976.
• 6. I. M. Filanovsky: Remarks on Design of Emitter-Coupled Multivibrators, IEEE Trans. Circuits and Systems, vol. 35 no. 6, pp. 1182-11185, 1992.
• 7. L. B. Oliveira, I. M. Filanovsky, and C. I. M. Verhoeven: Exact Calculations of Amplitudes and Frequency in an RC Oscillator with Quadrature Outputs, 47th IEEE Int. Midwest Symp. Circuits and Systems (MWSCAS'04), vol. I, pp. 413-416, July 2004.