MẠCH ĐIỆN TỬ 2 - CHƯƠNG 1 ppt

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 !
" !
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#*"$"
!%+,
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5!6578
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 !"#$%&'()*+
,-.
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/-0
BW = [f
H

– f
L
] (Hz)
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36-,7
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Đáp tuyến băng thông của mạch khuếch đại
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1 2
( ) 20lg 20lg
c

v v
R
A dB A
R R
 
= = +
 ÷
+
 
2 2
1 2
20lg 1 20lg 1 ( )dB
W W
ω ω
   
+ + − +
 ÷  ÷
   
JH*M$M"=N0
Hay A
v
(dB) = A
0
+ A
1
+ A
2
DEFG,H
2
1 1

1
1
1
0 ( 0)
20lg 1 3 ( )
20lg ( )
dB
A dB W
W
W
W
ω
ω
ω
ω
ω


↔ =

 

= + ≈ ↔ =

 ÷
 


↔ >>



6AB6"*C"H,
I,
6AB6"*C"HJKH,KHL
6AB6"*CMHN
6AB6"*C"=9
O3PQR0
6AB6"*C"O,KOL
6AB6"*C"PMO
1;"
6QR !8
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1HB9-22JE
J=SN3T3UJV$-
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$433J+.2234JV
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L8 >VNW"NWU'U3"3J+
:%+;"
7%X
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[45=C,
0
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