Semiconductor device with plural power supply circuits, plural i

Details Semiconductor device with plural power supply circuits, plural i Semiconductor device with plural power supply circuits, plural i

1998-08-26

1999-08-24

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Plural load circuit systems

Plural sources of supply

307 28, 307 29, H02J 110

Patent

active

059428082

ABSTRACT:
A semiconductor device has a plurality of power supply circuits whose generated voltages are different from each other, and a plurality of internal circuits whose operating voltages are different from each other. The power supply circuits and the internal circuits are interconnected by power lines with respective power supply switches inserted therein. The power lines are connected to a single external terminal by respective control lines with respective external switches inserted therein. The power supply circuits and the internal circuits can be tested from the single external terminal.

REFERENCES:
patent: 5349559 (1994-09-01), Park et al.
patent: 5396113 (1995-03-01), Park et al.
patent: 5557232 (1996-09-01), Shimogawa
patent: 5638013 (1997-06-01), Iwata et al.
patent: 5818783 (1998-10-01), Kim

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