Precision Photodiode Comparator

Posted on April 27, 2010 by Rust

This photodiode signal conditioning circuit is sensitive to light signal, suitable for interfacing digital serial signal. The biasing of the LM111 noninverting input is matched to the diode’s dark output, so it should be very sensitive.

Precision Photodiode Comparator1 circuit schematic diagram

[Source: National Semiconductor Application Note]

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