· 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 1:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 2:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 3:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 4:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 5:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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s(t) = cos(2"60t) + cos(2"100t) + cos(2"500t) + cos(2"1000t) + cos(2"4000t)

Page 6:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

!"#$#H'@45*#

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d H f( )dB

df=d

df20log H f( )( )[ ]

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=ln 10( )20

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dB

df

Fs = "ln 10( )20

H f( )d H f( )

dB

dff = fc

= "ln 10( )20 2

d H f( )dB

dff = fc

Page 7:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 8:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 9:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 10:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Passe bas "Ordre 4 ("80dB /dec)

fc =100Hz

Fs #1.46 10"2

Ff #300

100= 3

Page 11:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 12:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 13:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 14:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Passe haut "Ordre 6 ("120dB /dec)

fc =1000Hz

Fs # 2.15 10"3

Ff #1000

450= 2.22

Page 15:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 16:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 17:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 18:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 19:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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!

Passe haut "Ordre 3 ("60dB /dec)

fc =100Hz

Fs #1.06 10"2

Ff #100

20= 5

!

Passe bas "Ordre 5 ("100dB /dec)

fc =1000Hz

Fs #1.71 10"3

Ff #2500

1000= 2.5

Page 20:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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ZMNO' LMMNO' [MMNO' LMMMNO' VMMMNO'

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5.610"8cos(2#60t " 9.1) +10

"6cos(2#100t " 9) +1810

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1

2cos(2#1000t " 4.75) + cos(2#4000t "1)

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0.18cos(2"60t # 3.5) +1

2cos(2"100t # 2.75) + cos(2"500t # 2) +

1

2cos(2"1000t # 4) +10

#3cos(2"4000t # 7)

Page 21:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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=8' ;,&%;,&' D' ("5&8*"<88&%' >8' :#$%&' B2**&' -2*' 289' %&B#"&5&8$a'''

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`a! =8'*<>,2"$&'>9#"*&%'>8':#$%&'B2**&'-2*'(P<%(%&'(&>Y'2/&;'>8&'

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Page 22:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

Va! =8';,<"*"$'!&'e'Qa[J52Ya'k>&#'&*$'#P<%(%&'5"8"5>5'(>':#$%&'B<>%'S'e'

VM()'l'+<8;#>%&a'

[a! '=8';,<"*"$'52"8$&828$'!&'e'[J52Ya'k>&#'&*$'#P<%(%&'5"8"5>5'(>'

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Page 23:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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!

fc = fmax

!

f

!

Fe

2

!

Fe " fmax

!

Fe

:>E#

Page 24:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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p = "AdB

log Fe " fmax( ) " log fmax( )= "

AdB

logFe

fmax"1

#

$ %

&

' (

= "AdB

log ) "1( )

"40 = "40

log ) "1( )*) =11et Fe =11 fmax

p = "40

log(1.5)+ "227dB* Ordre12!

p = "40

log 4( )+ "66dB* Ordre 4

Page 25:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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Page 28:  · 2015. 9. 9. · !"#$#h’@45*#klc#2#d#$#qrs7

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sinc (.078) " 0.99# Tg fmax = 0.078$ Fgmin =12.82 fmax !

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