Output protection scheme for unipolar constant current source

Details Output protection scheme for unipolar constant current source Output protection scheme for unipolar constant current source

1989-05-30

1991-11-19

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361111, 361119, H02H 904

Patent

active

050670450

ABSTRACT:
A protection circuit for the output stage of an operational amplifier may utilize two diodes and two resistors. A circuit for protecting electronic components from the voltage on the cable has an operational amplifier having the signal connected to an input, a diode oriented to conduct the signal from an output of the operational amplifier to the cable, and a diode for shunting a voltage, of a polarity opposite the polarity of the signal, from a first conductor of the cable to a second conductor of the cable, and at least one resistor for limiting current flow to the second diode.

REFERENCES:
patent: 3982173 (1976-09-01), Berry et al.
patent: 4644294 (1987-02-01), Palara et al.

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