- #1
vg19
- 67
- 0
Homework Statement
Using your results, calculate the 3dB frequency of the RC filter.
The Attempt at a Solution
Basically in our lab, we made a simple series RC low pass filter. We put in a 16V peak to peak signal at varying frequencies below, and measured the output voltage at the capacitor (again peak to peak) on the scope. Now if I want to calc the 3dB frequency from my results, would I plot this on a graph and look for the 3dB point? I have tried this, but I think I am going wrong somewhere. The second table would be what I am trying to plot. I took first column is just the log of the frequency. The second column is 10log(Vout/Vin). It just doesn't seem right.
fin (Hz) Vo (V)
50 13.8
100 11.4
150 9.6
200 8.2
250 7.2
300 6.4
1.698970004 -0.749974923
2.000000000 -1.579527115
2.176091259 -2.326214759
3.301029996 -3.010299957
2.397940009 -3.665315444
2.477121255 -4.087127349
sorry for the formatting!