Day 21

Inverting Voltage Amplifier Lab

Today we went over steady-state responses and how they reacted to a sinusoidal voltage input. For this lab we will have the same frequency for both the input and output voltage but they will have different amplitudes (depending on the gain of the circuit) and different phase angles.

Pre-Lab

Here we are given the circuit diagram for an Inverting Voltage Amplifier

Here we are calculating what the gain and phase angle will be at different frequencies.

Here is an overview of all our calculations for the circuit

Here we are comparing our experimental values to our theoretical values.

And yes, a sexy pic of the built circuit.

Graphs

Here is the graph of the circuit at 100Hz.

Here is the graph of the circuit at 1kHz.

Here is the graph of the circuit at 5kHz.

Here is an overview of all our calculations, experiemental values, and percent error

Overall, this lab was a huge success as we can see the percent errors were all under 1%.

Op Amp Relaxation Oscillator Lab

We can get a relaxation oscillator when we design the circuit to have a device that will act as a switch when certain voltages are applied to one of the terminals. The "switching voltage" is across a capacitor that is being charged and discharged.

Here we just calculated the value of the resistor R.

 Sexy

Here we can see the voltages for the Op Amp Relaxation Oscillator

Overall, this experiment was a new way to see how oscillators within circuits worked.