Output driver with overshoot and undershoot protection

Details Output driver with overshoot and undershoot protection Output driver with overshoot and undershoot protection

1998-11-20

2000-01-25

Sherry, Michael J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 911, 361 92, 323276, H02H 320

Patent

active

060184507

ABSTRACT:
A output driving circuit having an output driving element, an overshoot protection mechanism, and an undershoot protection mechanism. When the overshoot protection mechanism senses an overshoot voltage at the output terminal of the output driving element, it raises the voltage at the control terminal of the output driving element. This serves to maintain the voltage between the output terminal and the control terminal of the output driving element within a safe range, thereby preventing overstress or damage to the element. When the undershoot protection mechanism senses an undershoot voltage at the output terminal of the output driving element, it lowers the voltage at the control terminal of the output driving element. This serves to maintain the voltage between the output terminal and the control terminal of the output driving element within a safe range, which in turn prevents overstress and damage to the element. The output driving circuit also has a recovery circuit for accelerating the process of returning the output driving element to normal operation after the effects of overshoot and undershoot have ceased. This aids in accelerating the operation of the output driving circuit.

REFERENCES:
patent: 5138516 (1992-08-01), Chapman
patent: 5617051 (1997-04-01), Bingham

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