Interface circuit

Details Interface circuit Interface circuit

2011-04-19

2011-04-19

Auve, Glenn A (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus interface architecture

C710S110000, C713S340000

Reexamination Certificate

active

07930461

ABSTRACT:
An interface circuit is disclosed.When a USB-BUS power source voltage VBUS is not normally supplied to the substrate gates of PMOS transistors of switches of a first switching circuit which controls connecting a terminal D+/RXD to a terminal D−/TXD in an HS driver circuit, and to the substrate gates of PMOS transistors of switches of a second switching circuit which controls connecting the terminal D+/RXD to the terminal D−/TXD in an FS driver circuit6; an amplified core circuit power source voltage DVDD is supplied to the substrate gates of the PMOS transistors. When the USB-BUS power source voltage VBUS is normally supplied to the substrate gates of the PMOS transistors, a USB stabilized power source voltage VUSB is supplied to the substrate gates of the PMOS transistors.

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