DC isolation and protection system and circuit

Details DC isolation and protection system and circuit DC isolation and protection system and circuit

1989-06-21

1991-07-09

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 90, 361 91, 361111, H02H 904

Patent

active

050310666

ABSTRACT:
A precision analog electronic circuit that is capable of sending accurate signals to an external device that has hostile electric characteristics, including the presence of very large common mode voltages. The circuit is also capable of surviving applications of normal mode overvoltages of up to 120 VAC/VDC for unlimited periods of time without damage or degradation. First, the circuit isolates the DC signal output from the computer. Means are then provided for amplifying the isolated DC signal. Further means are provided for stabilizing and protecting the isolating and amplifying means, and the isolated and amplified DC signal which is output to the external device, against overvoltages and overcurrents.

REFERENCES:
patent: 4476402 (1984-10-01), Best
patent: 4495536 (1985-01-01), Bynam
patent: 4544981 (1985-10-01), Hokoopion

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