High voltage tolerant I/O circuit

Details High voltage tolerant I/O circuit High voltage tolerant I/O circuit

2007-07-10

2007-07-10

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

Reexamination Certificate

active

10898462

ABSTRACT:
An I/O circuit is disclosed for tolerating a high voltage input without incurring a leakage current. An ESD current bypass module is coupled between a power supply node and a circuit pad. A high voltage tolerant charge module is used for disabling the ESD current bypass module when the circuit pad receives a high voltage input that is higher than a voltage at the power supply node. In addition, a high voltage tolerant discharge module may be included for alleviating the ESD current bypass module from a voltage overstress when the circuit pad receives a low voltage input that is lower than the voltage at the power supply node.

REFERENCES:
patent: 5495185 (1996-02-01), Goto
patent: 5631793 (1997-05-01), Ker et al.
patent: 5864243 (1999-01-01), Chen et al.
patent: 6034552 (2000-03-01), Chang et al.
patent: 6078487 (2000-06-01), Partovi et al.

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