I'm generating a sine wave to apply to a transistor in the push-pull configuration.
I am using a symmetrical source with 741 operational amplifier, + the IC 555 with plym 60 Hz 50% duty clycle, + another 741 with a filter passes the band at its input.
the problem is that when I measure in real life the circuit with the negative input of the oscilloscope on the ground plus the other on pin 6 of the 741 filter, I get a square wave.
Why do I get this square wave?.
Where am I going wrong?
formulas for the bandpass filter are these.
R1 = Q / (2 * 3.14 * F * G * C) R2 = Q [(2 * Q 2 -G) * 2 * 3.14 * F * C) R3 = R4 = 2 * Q / (2 * 3,14 * F * C) Q = quality factor. c = capacitance in farady. f = frequency.