Patent ID: 8750003

Claim:
A Direct Current to Alternating Current (DC to AC) converter comprising: a circuit having a positive portion and a negative portion; the positive portion, having a first driver, coupled to a source of positive DC voltage and producing a waveform in a positive half cycle and the negative portion, having a second driver, coupled to a source of negative DC voltage and producing a waveform in a negative half cycle; wherein said positive portion and said negative portion share a common output to provide alternating current at the common output, said positive portion and said negative portion each including an electronic switch for switching on and off the portion associated with that switch; and a polarity switch for closing one of said electronic switches according to a pre-determined threshold to switch on alternately said positive portion of said circuit and said negative portion of said circuit; the voltage of said output alternating current being fed as feedback to a comparator to control the polarity by switching on the appropriate switch; and wherein a carrier duty cycle may change from 0 to 100 percent in each half cycle; and further comprising two output inductors, one of said output inductors being coupled to said positive portion and the other of said output inductors being coupled to said negative portion.