The cost-effectiveness of small distributed generating resources is vital to the success of the high penetration of distributed generators within the microgrid concept. A common mechanism is the use of highly efficient inverters following the electrical storage systems. In this paper, the design of a basic inverter deploying a switching power amplifier is discussed. The amplifier acts like a power booster that taps the grid current as its frequency reference. The inverter transfer function was examined against voltage droop characteristics and was found to be in compliance with the IEEE 1547 standard for microgrid. The basic design simply utilizes the linear rise of voltage for the small triggering angle where the sinus of angle can be approximated as the angle in radians. This inherently performs a similar action such as a pulse width modulator for a narrow band. This inherent feature saves cost because it precludes the need for an extra power controller.

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