Electrostatic discharge protection circuit device

Details Electrostatic discharge protection circuit device Electrostatic discharge protection circuit device

2006-07-04

2006-07-04

Yu, Phuong T. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S111000, C361S118000

Reexamination Certificate

active

07072157

ABSTRACT:
An electrostatic discharge protection circuit device is disclosed, which comprises a first electrostatic discharge protection circuit connected between a first external terminal and a first ground terminal, a second electrostatic discharge protection circuit connected between a second external terminal and a second ground terminal, the second electrostatic discharge protection circuit having substantially the same configuration as that of the first electrostatic discharge protection circuit, a trigger signal line which connects to each other output nodes of surge detection circuits of the first and second electrostatic discharge protection circuits, and transfers a surge detection output of the first or second electrostatic discharge protection circuit to the other electrostatic discharge protection circuit as a trigger signal, and a common discharge line connected directly to the first ground terminal, connected to the second ground terminal via a parallel circuit composed of a forward-connected parasitic diode element and a reverse-connected parasitic diode element.

REFERENCES:
patent: 5079612 (1992-01-01), Takamoto et al.
patent: 5821804 (1998-10-01), Nikutta et al.
patent: 6947267 (2005-09-01), Liu et al.
M.-D. Ker, et al., IEEE Journal of Solid-State Circuits, vol. 32, No. 1, pp. 38-51, “A Gate-Coupled PTLSCR/NTLSCR ESD Protection Circuit for Deep-Submicron Low-Voltage CMOS IC'S”, Jan. 1997.

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