Inverting Voltage Amplifier Lab
In this lab, we measured the gain and phase responses of an inverting voltage amplifier circuit, and see the amplitude gain and phase difference between the output and input signals of a inverting voltage amplifier circuit. Then compared the measurements with expected values.
Here we are given the circuit diagram, and used the node to get the relationship between the Vin and Vout.
We are calculating what the gain and phase angle will be at different frequencies.
When frequencies is 100Hz, the waveform for Vin(red), and Vout(blue).
When frequencies is 1000Hz, the waveform for Vin(red), and Vout(blue).
When frequencies is 5000Hz, the waveform for Vin(red), and Vout(blue).
The built circuit consists of 2 Resistors (10kOhm), 1 Capacitor (1 microF), 1 Op Amp (OP 27), and a Analog Discovery device to provide input and measure output:
Here we see a direct comparison between our theoretical and experimental gain and phase shift angles. We can see that the percent error is small and acceptable for the most part. As a relatively quick experiment, we are pleased with our results.
Op Amp Relaxation Oscillator
The purpose of this lab is to construct a relaxation oscillator, which is a type of device that will act as a switch when a certain voltage is applied to one of its terminals. This voltage is usually the voltage across a capacitor that is being charged or discharged. we use the last 3 digit for student Id is: 155, and get the R values.
For the first time, We got the Graphics is not very ideal which is not a perfect square waveform.
After we reconnect the wires, we get what we want the perfect square waveform.
Summary:
Today we went over how OP Amps work in AC circuit, and did a new way to see how oscillators within circuits worked.
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