응용전자회로 #10
DESCRIPTION
응용전자회로 #10. 2012103816 강윤실. Second order Active filter. -HPF. 2 . HPF. 1. [dB]. *LPF 에서 R 과 C 를 바꾸면 HPF 가 됨. 2. 3. Second order Active filter. Band pass filter. 1. [dB]. 2. [dB]. 3. or. Second order Active filter. Notch pass filterfilter (Band stop filter). 1. 2. 3. - PowerPoint PPT PresentationTRANSCRIPT
1 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
응용전자회로 #10
2012103816 강윤실
2 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
Second order Active fil-ter
-HPF2. HPF
H ( jw )=𝐻𝑂𝐻𝑝∗𝐻𝐻𝑝( 𝑗𝑤)
1.
2
[dB]
𝐻𝐻𝑃→− { 𝑤𝑤𝑜
}2
3
|𝐻|=|𝐻𝑂𝐻𝑃|+𝑄
𝐻𝐻𝑃=+ jQ
*LPF 에서 R 과 C 를 바꾸면 HPF 가 됨
3 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
Second order Active fil-ter
- Band pass fil-
ter
1.
2.
[dB]
3.
𝐻 𝐵𝑃=1
[dB]
(𝑄𝑑𝐵=20 log𝑄)
or
𝑊 𝑜=√𝑊 𝐿𝑊 𝐻𝑄=
𝑊 𝑜
𝐵𝑊=
𝑊 𝑜
𝑊 𝐻−𝑊 𝐿
4 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
Second order Active fil-ter
- Notch pass filterfilter(Band stop filter)
1.
2.
3.
|𝐻|=𝐻𝑂𝑁
|𝐻|=𝐻𝑂𝑁
(dB)
𝐻𝑂𝑁 :𝑑𝑐𝑜𝑟 h h𝑖𝑔 − 𝑓𝑟𝑒𝑞𝑔𝑎𝑖𝑛
|𝐻|=0
H ( jw )=𝐻𝑂𝑁∗𝐻𝑁 ( 𝑗𝑤)
5 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
Second order Active fil-ter
-All pass filter
H ( jw )=1
Q 증가
0
−𝜋
−2𝜋
Q 증가
6 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
KRC filter- Low pass filter
R 1V i
R 2
V o
R A
R B
U 1
O PAMP
+
-
O U TC 2
V 2
C 1
V 1
0
0
𝐻𝑂𝐿𝑃=𝑘
¿𝑘𝑉 2
7 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
- High pass filter
R A
R B
U 1
O PAMP
+
-
O U T
0
0
C 1
V o
C 2
R 1
V i
R 2
KRC filter
𝐻𝑂𝐻𝑃=𝑘
¿𝑘𝑉 2
8 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
- Band pass filter
KRC filter
9 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
- Notch pass filter
R A
R B
U 1
O PAMP
+
-
O U T
0
Vo
R 1R 2
V iC 1C 2
C 3
KRC filter
10 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
- Band pass filter
U 1
O PAMP
+
-
O U T
C 1
V inC 2
A
R 1
B
R 2
V ou t
0
Multiple feedback Filter
11 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
- Low pass filter
U 1
O PAMP
+
-
O U T
R 1
B
0
R 2
R 3V in
C 1
V ou t
C 2
0
Multiple feedback Filter
3. HPF 는 LPF 에서 R 과 C 를 바꿔주면 된다 .
12 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
- Notch pass filter
Multiple feedback Filter
𝑉 𝑜=−𝑅3
𝑅4
𝑉 𝑖+𝑅5
𝑅3
𝑉 𝐵𝑃
All pass 에서 BPF 를 뺀것
13 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
State Variable Filter
적분기
14 강윤실
Dept. of Biomed. Eng. BME303:Applied Electronic Circuit Kyung Hee Univ.
Biguad Filter