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Engineering and Comp Sci Homework Help
Finding R and C values for an active second-order bandpass filter
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[QUOTE="palacetrading, post: 6858136, member: 733707"] I have been assigned the task to design an active bandpass filter with a passband of 0.1 to 10 Hz. At these two frequencies, there should be an attenuation of -6dB or more. So far I have selected my circuit layout which can be seen below [ATTACH type="full" width="352px" alt="1677078777485.png"]322712[/ATTACH] I found my transfer function so that I could calculate the R and C values and then converted into jw form. From here, I used math to remove the imaginary numbers and now I have my transfer function in terms of w and the components. [ATTACH type="full" alt="1677078855459.png"]322714[/ATTACH] [ATTACH type="full" alt="1677078893607.png"]322713[/ATTACH] My questions are as follows: 1. Is the w that I need to plug in the center frequency? So sqrt(0.1*10) = 1 Hz or would it be 1*2pi? 2. Have I set up my transfer function correctly for finding when 0.1 and 10 Hz will be -6db by setting it equal to 0.5? 3. If the above are true, in theory, do I just start plugging in values for the components to make the equation equal 0.5? [/QUOTE]
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Finding R and C values for an active second-order bandpass filter
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