Power supply apparatus, microbial fuel cell voltage boosting circuit and microbial fuel cell voltage boosting system

A microbial fuel cell voltage boosting circuit comprising:

• an inductor connected to an input terminal to which voltage of a microbial fuel cell is applied as input voltage;
• a first switch connected between a point between the inductor and an output terminal, and a ground terminal;
• a drive unit that operates the first switch using a signal having amplitude corresponding to the input voltage;
• and
• a control unit that controls at least one of:
• operation of the first switch;
• and outputting of output voltage from the output terminal, according to the output voltage to be output at the output terminal.

A power supply apparatus comprising:

• a boosting unit that is connected to an input terminal to which input voltage is applied, and boosts the input voltage using a signal having amplitude corresponding to the input voltage;
• and
• a control unit that controls at least one of:
• operation of the boosting unit;
• and outputting of output voltage from an output terminal, according to the output voltage to be output at the output terminal, wherein
• the control unit has at least one of:
• a first hysteresis comparator that, for controlling operation of the boosting unit, detects the output voltage to be output at the output terminal;
• and
• a second hysteresis comparator that, for controlling outputting of the output voltage, detects the output voltage to be output at the output terminal.