Electric circuit with protection against overvoltages

Details Electric circuit with protection against overvoltages Electric circuit with protection against overvoltages

2011-01-04

2011-01-04

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

07864493

ABSTRACT:
An electric circuit includes a supply terminal to receive an outer supply voltage and a voltage regulator coupled to the supply terminal and to provide supply and resting voltages. A lock-out circuit is switchable between active and inactive states and receives the supply voltage at a supply node to generate, in the active state, an output voltage on a output terminal thereof. A protection circuit protects against electrostatic discharge, having at least one first diode coupled between the supply node and the output terminal. A cut-off electronic lock couples, in the inactive state, the supply node to the supply terminal by reverse biasing the at least one first diode to make a voltage of the output terminal float.

REFERENCES:
patent: 6400546 (2002-06-01), Drapkin et al.
patent: 7532054 (2009-05-01), Kanno et al.
patent: 2009/0195292 (2009-08-01), Kanno et al.

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