>The principle of operation of the opto-bridge multiplier is
>explained in an earlier Idea for Design ("Optical Isolator
>computes Watts", Electronic Design, Oct 14, 1994, p102).

Found a copy of this one as well. It is by the same guy. Must take these
away and digest them now.

The only concern I see for these is the non-linearity of the LED versus the
supplied voltage. Not sure how the circuit gets around this.

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