How can I fix my amp?

How can I fix an op amp voltage buffer that produces 1.5V output when input is 0V?

  • I have a voltage buffer using an op amp, with a 9V supply voltage and a 4.7V input for high. When I ground the input, the output is 1.5V which should be 0. How do I fix it? The (-) is connected to output and the input is on the (+).

  • Answer:

    It's hard to tell, but the buffer probably needs both positive and negative supplies.

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