Methods and systems for electrostatic discharge

Details Methods and systems for electrostatic discharge Methods and systems for electrostatic discharge

2007-02-13

2007-02-13

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

10972805

ABSTRACT:
An indirect clamping topology may be used to protect against the damaging effects of an electrostatic discharge event. An input node of a device is protected by a guard. The guard is driven by a signal from a unity-gain amplifier that flows through a resistance. The input node is clamped to the guard by a diode, and the guard is clamped to a low-impedance rail by another diode. The resistance of the low-impedance rail is less than that of the resistance through which the signal from the unity-gain amplifier flows, so that voltage resulting from the event flows to the low-impedance rail and not to the amplifier.

REFERENCES:
patent: 4158863 (1979-06-01), Naylor
patent: 5563757 (1996-10-01), Corsi
patent: 6396712 (2002-05-01), Kuijk
patent: 6580591 (2003-06-01), Landy
patent: 6704180 (2004-03-01), Tyler et al.
patent: 6750953 (2004-06-01), Douglas

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