Convert Sine Wave To 5 Volt Square Wave

Ian0

Joined Aug 7, 2020
13,141
That looks like a variation of dangle-biasing, something notoriously unstable WRT temperature, aging, and individual component variations.

ak
It's probably close enough, and no worse than the original. If you want hysteresis, then there is a lower limit on the signal amplitude which is the hysteresis levels. R3 removes some of the temperature variation.
 
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