Fiberoptic interface

Posted on Sep 5, 2012

An op amp is used to interface between a fiberoptic system and the MOS SCR to multi-cycle, half-wave control of a load. This receiver has two complementary outputs, one at a quiescent level of about 0.6 V and the second at 3 V. By adding a 4.7 V zener in series with the return bus, the effective VqC becomes 5.3 V and also the 0.6 V output level is translated up to about 5.3 V.

Fiberoptic interface
Click here to download the full size of the above Circuit.

This level is compatible with the reference input (5.9 V) of the single-ended powered op-amp acting as a comparator.

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