Electrostatic discharge protection circuits

Details Electrostatic discharge protection circuits Electrostatic discharge protection circuits

2007-11-27

2009-10-06

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

07599160

ABSTRACT:
An electrostatic discharge (ESD) protection circuit is provided. A transistor is coupled between a node and a ground, and has a gate coupled to the ground. A diode chain is coupled between the node and a pad, and comprises a plurality of first diodes connected in series, wherein the first diode is coupled in a forward conduction direction from the pad to the node. A second diode is coupled between the node and the pad, and the second diode is coupled in a forward conduction direction from the node to the pad.

REFERENCES:
patent: 6144542 (2000-11-01), Ker et al.
patent: 7167350 (2007-01-01), Salcedo-Suner et al.
patent: 7372109 (2008-05-01), Chen et al.
patent: 7408752 (2008-08-01), Ma et al.
patent: 7411767 (2008-08-01), Huang et al.
patent: 2005/0162791 (2005-07-01), Ahmad et al.
patent: 2008/0080108 (2008-04-01), Lin et al.
patent: 2008/0093672 (2008-04-01), Perng et al.

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