LS404 查看數據表（PDF） - STMicroelectronics
零件编号
产品描述 (功能)
生产厂家
LS404 Datasheet PDF : 11 Pages
| |||
LS404
Figure 16 : Multiple Feedback 8-pole Bandpass Filter
C3
C1 R1
C2
IN
0.1m F
R4
Vcc
R2 22kW
R5
2
¼1
R6
3 LS404
4
C4
0.1m F
R3 22kW
C6
R8
C5
6
¼7
R9
R7
5 LS404
11
C7
220m F
C13
0.22m F
C9
R11
C8
9
¼8
R12
R10 10 LS404
C11
C10
R13
R14
13
C12
0.1m F
¼ 14
12 LS404
Out
Figure 17 : Six pole 355Hz Low-pass Filter (chebychev type)
0.47µF
56kΩ
10kΩ
10kΩ
10kΩ
86.1nF
161nF
10kΩ
10kΩ
16.3nF
220nF
10kΩ
3.54nF
60nF
This is a - pole Chebychev type with ±0.25dB ripple in the passband. A decoupling stage is used to avoid
the influence of the input impedance on the filter’s characteristics. The attenuation is about 55dB at 710Hz
and reaches 80dB at 1065Hz. the in band attenuation is limited in practise to the ±0.25dB ripple and does
not exceed 0.5dB at 0.9fc.
Figure 18 : Subsonic Filter (Gv = 0dB)
10kΩ
C
C
22kΩ
Fc (Hz) C (µF)
15
0.68
Vout
22
0.47
30
0.33
55
0.22
100
0.10
Figure 19 : High Cut filter (Gv = 0dB)
C2
10kΩ
Vin
10kΩ
C1
3
1
Vout
2
Fc (Hz) C1 (nF) C2 (nF)
3
3.9
6.8
5
2.2
4.7
10
1.2
2.2
15
0.68
1.5
9/11
Share Link: 