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FEEDBACK_LOOP_STABILIZES_A_F_OSCILLATOR_AMPLIFIER

2016-08-21 10:43  
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FEEDBACK_LOOP_STABILIZES_A_F_OSCILLATOR_AMPLIFIER
Wien bridge determines frequency of oscillator, which is combined with amplifier stages to give single oscillator stage having suffident output power to drive load directly. Thermistor R2 and resistor R3 provide negative feedback path around amplifier and oscillator, to make oscillator gain and frequency independent of load variations.-R. G. Fulks, Novel Feedback loop Stabilizes Audio Oscillator, Electronics, 36:5, p 42-43.