Circuit system for protecting thin dielectric devices from...

Details Circuit system for protecting thin dielectric devices from... Circuit system for protecting thin dielectric devices from...

2008-09-02

2008-09-02

Sherry, Michael J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

C361S056000

Reexamination Certificate

active

11332565

ABSTRACT:
A circuit system is disclosed for protecting a capacitor coupled between a voltage supply node and a complementary voltage supply node from an ESD. The circuit system includes at least one NMOS transistor having a drain coupled to the voltage supply node, a source and a gate together coupled to the complementary voltage supply node, and at least one diode chain having one or more diodes serially coupled between the voltage supply node and the complementary voltage supply node. During an ESD event, the diode chain and the NMOS transistor dissipate an ESD current from the voltage supply node to the complementary voltage supply node, thereby protecting the capacitor from ESD induced damages.

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patent: 2002/0084490 (2002-07-01), Ker et al.
patent: 2004/0105203 (2004-06-01), Ker et al.

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