Power supply apparatus

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

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323222, G05F 140

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active

058923535

ABSTRACT:
A power supply apparatus for stepping up an input voltage and for outputting a constant voltage includes an inductance element and a first transistor connected in series between an input terminal and an output terminal, a second transistor connected between a node between the inductance element and the first transistor and a reference potential, and a voltage holding element connected between the output terminal and the line of the reference potential. The first and second transistors are alternately rendered conductive in accordance with an output voltage from the output terminal while the voltage holding element is charged, so that the voltage of the power supply is stepped up.

REFERENCES:
patent: 5552694 (1996-09-01), Appeltans
patent: 5612610 (1997-03-01), Borghi et al.
patent: 5691632 (1997-11-01), Otake
patent: 5721483 (1998-02-01), Kolluri et al.

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