EE lab report discussion part.

Lab 3 Report

Part 1

For this lab, was to calculate an RC High-Pass Filter circuit of the resistance for a resistor in an RC High Pass

Filter circuit

We using equation 11

00 1

2 CR

f  

to found 01.0 r12

1 

R C

 μF

After we calculate the capacitor value we put in the value,and Complete a frequency sweep going from 10 Hz

to 25 kHz we got the graph on the oscilloscope shows in figure 1

Figure 1: Frequency Sweep Plot. Of RC High-Pass Filter Circuit

Then we using the oscilloscope to measured the output voltage,and power,and Measurements of the

peak-to-peak voltages

Figure 2: the peak-to-peak voltages

After that we consisted same RC circuit schematic with a 5V peak-to-peak sinusoidal wave to measure with

different voltages. We change the frequencies form 100 Hz, 5kHz, and 20kHz. And get the

Figure 3:at 100Hz. -Identical RC circuits with different source voltages superimposed

Figure 4: at 5kHz- Identical RC circuits with different source voltages superimposed

Figure 5: at 20kHz-Identical RC circuits with different source voltages superimposed

Part 2

For part 2 RC filter was then attached to an Op-Amp with two separate voltage gains.and using a voltage-division

approach, read the output voltage

Figure 6: at a frequency of 20kHz. RC circuit filtering with an additive Op-Amp

Figure 7: at a frequency of 5kHz. RC circuit filtering with an additive Op-Amp

Figure 8: at a frequency of 100kHz. RC circuit filtering with an additive Op-Amp

then,we test the sinusoidal frequency sweep from 10HZ to 5KHZ，generated the basic frequency

response characteristics showing on the Figure.

Figure 9: Lead-Lag RC Network Sinusoidal Frequency Sweep from 10Hz to 5kHz

After that we test the maximum and minimum of phase-lag plotted showing on the following figure

Figure 11: Lead-Lag RC Network Close to the Minimum Phase-Lag Frequency of 100Hz.

Figure 11: Lead-Lag RC Network Close to the Minimum Phase-Lag Frequency of 5kHz.

Lastly,we get the output of the Op-Amp RC filtering

Figure 12: Lead-Lag RC Filter

Matlab

The answer is