Engineering Board Exam Reviewer · Passive Filters · medium
Find the voltage gain, in decibels, of the RC low-pass filter shown (R=330, , C=100 nF) at 24.1 kHz.
- -7.1 dB
- -14.1 dB
- -3 dB
- 14.1 dB
Answer
B. -14.1 dB
Solution
fc=4.82 kHz and f/fc=5. VoutVin= 1sqrt(1+52)=0.196. AdB=20 10(0.196)=-14.1 dB.
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