Electrostatic discharge protection circuit protecting thin...

Details Electrostatic discharge protection circuit protecting thin... Electrostatic discharge protection circuit protecting thin...

2008-03-11

2010-11-23

Fureman, Jared J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S091100, C361S111000

Reexamination Certificate

active

07839613

ABSTRACT:
An electrostatic discharge protection circuit protects the internal circuits of a semiconductor. The electrostatic discharge protection circuit includes a first electrostatic protection unit connected to a power source supply pad. The first electrostatic protection unit discharges an ESD current into the power source supply pad when an ESD is introduced into the input/output pad, and generates a first driving voltage by utilizing the ESD current flow through a voltage-drop unit. A driver driven by the first driving voltage generates a second driving voltage by an ESD current. A second electrostatic protection unit discharges the introduced ESD current into the power source supply pad by the second driving voltage such that a voltage applied to a gate of the first NMOS transistor is reduced.

REFERENCES:
patent: 6388850 (2002-05-01), Ker et al.
patent: 7286331 (2007-10-01), Choi
patent: 7582938 (2009-09-01), Chen
patent: 2003/0128486 (2003-07-01), Chuang et al.

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