Transcript Bandpass Filter Section 14.4 Design a Series Band-Pass Filter DC (Large freq) Quantitative Analysis.

Bandpass Filter
Section 14.4
Design a Series Band-Pass Filter
DC
(Large freq)
Quantitative Analysis
Resonant Frequency
• Resonant Frequency is defined as the frequency
where the sum of the capacitor and inductance
impedance is zero.
Cutoff Frequencies & Center
Frequency
Alternative Forms of Cut-Off
Frequency
Bandwidth, Center
Frequency driven approac
Bandwidth, Quality Facto
driven approach
Bandwidth & Quality Factor
Use a Matlab Script to Calculate
Component Values
Parameter Exploration
• Assume L=2.4 mH, Q=10
fo
(KHz)
B
(rad/s)
R
(Ω)
C
(uF)
fc1
(KHz)
fc2
(KHz)
1
628
1.50
10.5
0.951
1.051
2
1256
3.01
2.63
1.9
2.1
4
2513
6.031 0.659
3.80
4.20
8
5026
12.06 0.164
7.60
8.40
Difficult to change capacitance!
Bandwidth changes as you change fo.