input voltage and the voltage boost circuit will operate to increase dc output voltage from the dc input as the dc output voltage from the voltage bypass circuit is not high enough to meet requirement by ac output power the dc ac converter module receives the output voltage from the voltage boost module and converts the received voltage to the required ac output power application_number US 16004405 A description fig2 a is a circuit diagram of a dc ac converter according to an embodiment of the invention wherein the dc ac converter includes a voltage boost module 202 a dc ac converting module 204 and a feedback module 216 the voltage boost module 202 of the embodiment includes a voltage bypass circuit 208 and a voltage boost circuit 206 here the voltage boost circuit 206 in fact can be seen as a dual voltage boost circuit which includes inductors 224 and 226 diodes 218 and 220 a capacitor 232 a first transistor switch 228 and a second transistor switch 230 wherein one end of each of the inductors 224 and 226 is coupled with the positive end of a dc input power 258 and another end thereof is coupled with the node between diodes 218 and 220 one end of the first transistor switch 228 is coupled with the common end of the inductor 224 and the.