Current limiter with low drop voltage for surge protection...

Details Current limiter with low drop voltage for surge protection... Current limiter with low drop voltage for surge protection...

2006-07-04

2006-07-04

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Impedance insertion

Reexamination Certificate

active

07072159

ABSTRACT:
A current limiter circuit which exhibits a low dropout voltage. The current limiter circuit is suitable for protecting process control equipment operating on a current loop. The current limiter circuit includes an interface for coupling to the current loop, and a current source element coupled to the process control equipment. The current source element comprises a current limiter circuit to limit the current flowing to the process control equipment, and a voltage reference circuit coupled to the current limiter circuit provides a predetermined voltage reference during operation of the current source element.

REFERENCES:
patent: 5416723 (1995-05-01), Zyl
patent: 6140940 (2000-10-01), Klofer et al.

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