Patent ID: 6879502
Filing Date: 2005-04-12
Classification: H02M

Abstract:
1. A power source inverter circuit comprising: a variable DC—DC converter for raising or dropping a voltage of electric power which is supplied from power feeding means; storage means for storing electric power whose voltage has been raised or dropped by the variable DC—DC converter; a MOSFET switch for connecting an output of the power feeding means to an input of the variable DC—DC converter; a MOSFET switch for connecting an output of the variable DC—DC converter to an input of the storage means; a MOSFET switch for connecting the output of the variable DC—DC converter to an input of a load circuit; a MOSFET switch for connecting the input of the variable DC—DC converter to the input of the storage means; a control circuit for controlling gates of the MOSFET switches; and a voltage detector for monitoring an output voltage of the power feeding means, a voltage of the storage means, and an input voltage of the load circuit, and for outputting voltage information to the variable DC—DC converter and to the control circuit.