This is an interface circuit of Quadrature Encoder (A, A', B, B') with MCU. I cannot make sense of the working of OpAmps in this circuit. Is it some standard circuit for doing signal conditioning or is it doing some signal processing on the input signals? And what could be the purpose of OA and OB outputs?
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data for possible encoders added as image.
Best Answer
The schematic quality is terrible but we should be able to figure it out.
The OA and OB outputs can be fed into some standard logic inputs but CMOS is most likely as it is a 15 V output.