Problem involving op amp and using nodal analysis to solve it
We were then assigned to find the output voltage of an op-amp with no open loop gain
Finding instaneous power
Finding current and the equivalent impedance of a circuit
"Op-Amp relaxation Oscillator" Lab
Prelab(finding a combination of resistor and capacitorthat would output a frequency of one's last 3 digit on student id):
Everycircuit on the proposed resistor and capacitor combo:
The circuit:
The components:
Waveform of the voltage across the 7.3k resistor
Waveform of the voltage across the 7.3k resistor(yellow) and the capacitor(blue)
Waveform of the voltage across the two 1k resistor(yellow) and the capacitor(blue)
Values comparing the theoretical and experimental frequency
Summary:
Everycircuit has the "inject noise" option, where by dragging and shaking the circuit, it allows us to make a circuit without a power supply and still read its values (circuits with capacitors and op amp inside). From the experiment, we could see that the theoretical and measured frequency across the 7.3k resistor(the one we fiddled with) are pretty close to each other. It shows that we could create a circuit with a desired frequency by changing the combination of the capacitor and the feedback resistor. Also, by leaving the two resistance near the ground to be equal to each other, we make the calculation for the desired frequency much easier for ourselves.
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