Phase Shift Oscillator Better Topology

There's always room for improvement they say. If anybody can think of some improvement post it in the comments. Why is this better you ask? Well for once all the bias chains are separated. Plus an emitter follower stage was added to provide better stability of the oscillator stage by cancelling out any disturbance from the output (removing changing the load) . Also I've changed the way on how the strenght of the positive feedback is varied. Usually the emitter resistor is variable and that dirsrupts the bias points of the oscillator that need readjustment later. But how I've made the feedback only the AC is varied leaving the DC bias chains intact.

published 11 years ago