Finding Cut-Off Frequencies in a Circuit: A Lab Experiment

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SUMMARY

The discussion focuses on determining cut-off frequencies in a band reject filter circuit based on lab results. The cut-off frequencies are identified as the points where the gain drops to 3 dB below the maximum gain, which is 17.6 dB in this case. To accurately find these frequencies, measurements should be extended below 20 Hz and above 20 kHz, potentially reaching several MHz. A link to additional resources is provided for further clarification.

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basimjmal
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i did the lab and find all varible
but I can understand how find cut-off frequency
the question is
From you result in table Find the cut-off frequency


circuit figure

1ibud1.jpg


lab result
http://img19.imageshack.us/img19/6967/80959768.png


thanks so much in advance
 
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go to this link...there is a answere for ur queston...it seem to be as band reject filter..
check this out

http://knowhowstuff.blogspot.com/search/label/Physics%20Q%20and%20A
 
The cutoff frequencies arethe frequencies where the gain is 3dB below the gain at the the middle frequencies.
Since your gain at middle frequency is 17.6 dB, you should extend your measurements below 20HZ and above 20kHz (probably several MHz), to find the cutoff frequencies.
 

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