Circuit for discharging static electricity

Details Circuit for discharging static electricity Circuit for discharging static electricity

2007-06-29

2009-06-09

Leja, Ronald W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

Reexamination Certificate

active

07545616

ABSTRACT:
The present invention relates to a semiconductor circuit, and more particularly, to a circuit for discharging static electricity, which is connected between an internal circuit and an input/output pad to provide a charge device model (CDM) discharging path. The circuit includes a plurality of input/output pads; a plurality of switching units corresponding one-to-one to the input/output pads and turned on in a low voltage state; resistors connected between the input/output pads and the switching units so as to correspond one-to-one to the input/output pads and the switching units; and a CDM discharge unit shared in serial by the plurality of the switching units and providing a ground path.

REFERENCES:
patent: 5946175 (1999-08-01), Yu
patent: 6678133 (2004-01-01), Roohparvar
patent: 6738248 (2004-05-01), Jenkins et al.
patent: 2002/0126430 (2002-09-01), Roohparvar
patent: 2001-267496 (2001-09-01), None
Notice of Patent Grant mailed Jan. 8, 2008 for the corresponding KR10-2006-0061587.

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