The purpose of this project was to investigate the effects on efficiency and distortion of a dynamic power supply to be used for the output stage of a Class A audio amplifier. Currently, the highest efficiency for a Class A audio amplifier is 25%. Using a dynamic power supply could push well beyond this limitation.
This was accomplished by building a prototype of both a standard Class A amplifier and a dynamic power supply Class A amplifier. The two were then compared on the basis of efficiency and harmonic distortion of the output stage. The results were then analyzed to determine whether the dynamic power supply design could achieve a higher efficiency than the standard power supply design and if harmonic distortion was introduced.