Power supply clamp circuit

Details Power supply clamp circuit Power supply clamp circuit

2006-05-23

2006-05-23

Vu, Phuong T. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

C361S056000, C361S091100, C361S111000, C361S091500, C361S018000

Reexamination Certificate

active

07050282

ABSTRACT:
A power supply clamp circuit for preventing damage to an integrated circuit due to electrostatic discharge. The power supply clamp circuit includes a voltage generator electrically connected to a first node for generating a voltage; a first PMOS transistor having a source electrically connected to the first voltage source, a gate electrically connected to the first node, and a drain electrically connected to a second node; a first NMOS transistor having a drain electrically connected to the second node, a gate electrically connected to the first node, and a source connected to ground; a second NMOS transistor having a drain electrically connected to the first voltage source, a gate electrically connected to the second node, and a source connected to ground; and a second PMOS transistor having a source electrically connected to the second node, a gate and a drain commonly electrically connected to the first node.

REFERENCES:
patent: 5550497 (1996-08-01), Carobolante
patent: 6249410 (2001-06-01), Ker et al.
patent: 6344417 (2002-02-01), Usenko

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