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The misunderstood twin-T oscillator

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2 Author(s)
N. Boutin ; ELECTRICAL ENGINEERING DEPARTMENT, Sherbrooke University, Sherbrooke Quebec, Canada, J1K 2R1 ; A. Clavet

It is shown that the ideal symmetrical twin-T built with zero tolerance components requires an ideal amplifier with infinite gain to sustain oscillations. A systematic procedure is outlined to find out the minimum amplifier gain required to sustain oscillations as well as the frequency at which the circuit will oscillate, knowing the nominal values and tolerances of each component of the passive twin-T.

Published in:

IEEE Circuits & Systems Magazine  (Volume:2 ,  Issue: 4 )