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All,
Thanks for your help!
The gain is high because this part of a larger circuit. A microphone is actually attached to the input. I was just testing the circuit with the TTL signal.
Audioguru is correct this opamp is not rail to rail. I was just being lazy by writing +/- 9 volts rather...
I have this inverting Op Amp circuit. When I input a TTL signal which goes from 0 to +5 volts, I expect the output to be inverted and go from 0 t0 -9 volts.
What I see on the O'scope is a square wave going from +9 volts to -9 volts.
Why is this?
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