Schmitt trigger-configured ESD protection circuit

Details Schmitt trigger-configured ESD protection circuit Schmitt trigger-configured ESD protection circuit

1997-11-05

1999-11-02

Jackson, Stephen W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361111, 361117, 361118, 361127, H02H 900

Patent

active

059781920

ABSTRACT:
A Schmitt trigger-configured overvoltage protection circuit has a hysteresis turn-on, turn-off characteristic that minimizes its sensitivity to noise, and is effective to protect an integrated circuit against a DC overvoltage condition, and electrostatic discharge-based transients, while allowing `hot` insertion of a device containing the clamping circuit into an already powered-up system. The protection circuit employs a reference device, such as a Zener diode, that enables the clamping circuit trigger threshold to be set at a value that is independent of the power supply voltage.

REFERENCES:
patent: 5463520 (1995-10-01), Nelson

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