Interface device and information processing system
AssigneeHitachi, Ltd.
InventorsFumio Murabayashi, Takashi Sase, Mutsumi Kikuchi, Atsuo Watanabe, Masatsugu Amishiro, Kenji Tabuchi
Life of this patent
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Abstract
A first converter circuit converts a state signal, whose level is constant or slowly varies during a predetermine period of time, into a pulse signal to allow the signal to propagate across an electrically insulating area. A second converter circuit converts the pulse signal, which has propagated through an insulating circuit, into the original state signal or a signal having the same characteristics as the original state signal.
Claims5
A semiconductor integrated circuit device with a network transceiver and at least one power supply circuit formed on the same semiconductor substrate, wherein:
- at least one of said power supply circuits is a switching regulator;
- said switching regulator includes two outputs;
- one of said two outputs being connected with a power supply terminal of said network transceiver;
- and
- the other output being connected with a power supply terminal of a microcomputer.
A semiconductor integrated circuit device with a network transceiver and at least two power supply circuits formed on the same semiconductor substrate, wherein at least one of said power supply circuits is a switching regulator, and at least one of said power supply circuits is a dropper-type regulator, outputs of the switching regulator and the dropper-type regulator being provided separately from each other.
A semiconductor integrated circuit device including a semiconductor integrated circuit with a network transceiver adapted to connect to a network and at least one power supply circuit formed on the same semiconductor substrate, wherein the output of an input/output terminal of the transceiver and an output terminal of the power supply circuit are connected to pins of a package having the semiconductor integrated circuit mounted thereon, said pins including a terminal for signal-connection with a microcomputer on the opposite side of the network, and a terminal for power supply to the microcomputer.
Dependencies are inferred from the claim text.