Amplifier Design in a Motional Feedback System
O. de Groot, J. Salentijn · Research Repository (Delft University of Technology) · 2016
The quality of audio amplifiers used in Hi-Fi sound installations is largely determined by the distortion of the output signal. This report proposes a method of improving the distortion reduction in audio amplifiers by using a topology with active feedback. The characteristics of the standard non-inverting amplifier are extended to this new topology and the stability problems caused by the active feedback are resolved with frequency compensation. The amplifier discussed in this report is developed for a motional feedback application, therefore a full audio system including cross-over filters, a subtracting amplifier and a displacement sensor is designed. Lastly a PCB is designed to integrate the different circuits into an end product.