s fs () s 2 - university of british columbialeos/pdf/e341/notes/nyq.pdf · elec 341 -nyquist...
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Elec 341 - Nyquist Criteria
1
( )2
sF s
s
1
: 1 ( ) .4 .23
1: 1 ( ) .33
31
: 1 ( ) .4 .23
: ( ) .2 .42
1: 1 ( )
1
1: 1 ( ) 1
11
: 1 ( )1
: ( ) .2 .42
jA s j F s j
j
B s F s
jC s j F s j
j
jD s j F s j
j
jE s j F s j
j
F s F s
jG s j F s j
j
jH s j F s j
j
G
A
CB
D
F
E
H
G A
C
B
D
F
E
H
Elec 341 - Nyquist Criteria
2
𝐾𝐺𝐻 10010
𝑠 1 𝑠 10
GM = ∞ dBPM -20 ωc 30 rad/s
𝐾𝐺𝐻 10010
𝑠 𝑠 1 𝑠 10
GM = n/aPM = n/a ωc 10 rad/s