Engineering Board Exam Reviewer · Passive Filters · easy
A band-pass filter has lower and upper cutoff frequencies of 8 kHz and 12 kHz. What is its bandwidth?
- 4 kHz
- 10 kHz
- 20 kHz
- 2 kHz
Answer
A. 4 kHz
Solution
BW=f2-f1=12 kHz-8 kHz=4 kHz.
More Passive Filters questions
- Beyond the cutoff frequency, the output of a first-order passive filter rolls off at
- At the cutoff frequency of a first-order filter, the output voltage is what fraction of the maximum (passband) output?
- A low-pass filter
- The RC high-pass filter shown uses R=4.7 k and C=22 nF. Find its cutoff frequency.
- The RC low-pass filter shown uses R=15 k and C=10 nF. Find its cutoff frequency.
- Two identical RC low-pass sections, each with a cutoff of 1 kHz, are cascaded with a buffer between them so that the sections do not load…
- A first-order RC high-pass filter delivers 3.5 V rms for a 10 V rms input at 500 Hz. What is its cutoff frequency?
- In the loaded low-pass filter shown, R1=1 k , R2=1.5 k (the load), and C=100 nF. Find the cutoff frequency.
- The band-stop (notch) filter shown has R=220, , L=25 mH, and C=400 nF. At what frequency is the output voltage (ideally) zero?
- A band-pass filter has half-power frequencies of 3 kHz and 12 kHz. Its center frequency, taken as the geometric mean, is