POWER SWITCH CIRCUIT AND ELECTRONIC DEVICE

Title:

POWER SWITCH CIRCUIT AND ELECTRONIC DEVICE

Document Type and Number:

WIPO Patent Application WO/2000/043859

Kind Code:

A1

Abstract:

An MPU changes the level of an output signal (Stime) at an output port from H to L at a predetermined time after a PC card is detected by a card detector of an electronic device. A switch driver circuit turns a power switch ON when the signal (Stime) becomes H, and turns it OFF when no PC card is detected. As a result, the PC card is protected from an electric shock when inserted in the electronic device (S) or removed from it.

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Inventors:

KUROIWA TOSHIHISA (JP)

Application Number:

PCT/JP2000/000169

Publication Date:

July 27, 2000

Filing Date:

January 17, 2000

Export Citation:

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Assignee:

NIPPON KOGAKU KK (JP)
KUROIWA TOSHIHISA (JP)

International Classes:

G06F1/26; G06F3/00; H02J1/00; (IPC1-7): G06F1/26; G06F3/00

Foreign References:

JPH0345124A	1991-02-26
JPH04287110A	1992-10-12
JPH0741619U	1995-07-21

Attorney, Agent or Firm:

Nagai, Fuyuki (3-2-4 Kasumigasek, Chiyoda-ku Tokyo, JP)

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