Hello guys,
Recently I was experimenting some basic op-amp circuits based on the common uA741 IC. In one of the circuits, I used the uA 741 as a comparator. Basically, I applied a 50Hz, 6V rms sinusoid between the inverting and non-inverting inputs. I expected that the output would be a perfect square wave, but the actual result was a bit suprising to me.
During positive saturation of the op amp, the output voltage was not a constant. In fact the value DECREASED by approximately 0.1V by the time negative saturation was triggered. Similarly, during negative saturation, the output voltage was not constant. This time the value INCREASED by approximately 0.1V by the time the next positive saturation was triggered. See the attached picture for a sketch of the waveform I obtained
This suprised me because the circuit is showing some sort of 'capacitor discharging' effects while NO capacitors were used in the circuit.
So what practical reasons there might be for the op amp to exibit such a behaviour?
thanks
Recently I was experimenting some basic op-amp circuits based on the common uA741 IC. In one of the circuits, I used the uA 741 as a comparator. Basically, I applied a 50Hz, 6V rms sinusoid between the inverting and non-inverting inputs. I expected that the output would be a perfect square wave, but the actual result was a bit suprising to me.
During positive saturation of the op amp, the output voltage was not a constant. In fact the value DECREASED by approximately 0.1V by the time negative saturation was triggered. Similarly, during negative saturation, the output voltage was not constant. This time the value INCREASED by approximately 0.1V by the time the next positive saturation was triggered. See the attached picture for a sketch of the waveform I obtained
This suprised me because the circuit is showing some sort of 'capacitor discharging' effects while NO capacitors were used in the circuit.
So what practical reasons there might be for the op amp to exibit such a behaviour?
thanks
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