Optically coupled fast turn off load switch drive

Details Optically coupled fast turn off load switch drive Optically coupled fast turn off load switch drive

1990-10-31

1992-12-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

307311, G02B 2700

Patent

active

051700590

ABSTRACT:
A drive ciruit for a load switch (104) controlling current flow through an electrical load (106) in accordance with the present invention includes a switching signal source (10), a first optical coupler (110), coupled to the switching signal source which turns on to produce an output drive signal in response to a first level of a switching signal (100) from the switching signal source to control turning on of the load switch; and a second optical coupler (114) coupled to the switching signal source which turns on to produce an output drive signal in response to a second level of a switching signal from the switching signal source to control turning off of the load switch.

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