Direct-current power source circuit with back gate control circu

Details Direct-current power source circuit with back gate control circu Direct-current power source circuit with back gate control circu

1991-10-24

1993-01-19

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323279, 323303, G05F 1565

Patent

active

051809656

ABSTRACT:
A direct current power source circuit has a voltage control power MOS-FET and a back gate control circuit. The voltage control power MOS-FET is connected between an input terminal and an output terminal of the circuit and the back gate control circuit is connected to a back gate of the voltage control power MOS-FET and controls a back gate voltage for causing a parasitic diode between a source and a drain of the power MOS-FET to become a non-conductive state when an input voltage applied to the input terminal becomes a low level. The output of the back gate control circuit is also connected to a voltage dividing circuit which sets an output voltage of the power source circuit. The arrangement enables to prevent a reverse flow of current from the output terminal to the input terminal.

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