Chương 6 kĩ thuật điện tử (Tách sóng +PLL)

T¸ch sãng
T¸ch sãng
t¸ch sãng ®iÒu biªn
t¸ch sãng ®iÒu tÇn
t¸ch sãng ®iÒu pha.

Kh¸i niÖm

trình


!"
#$ ả
%&'U
S
) (()*$ả
+',

 /01**


'



$

T¸ch sãng tÝn hiÖu ®iÒu biªn
T¸ch sãng tÝn hiÖu ®iÒu biªn


2%
3
!
4
5!
6
7!


7!
0*',8'#


5!
9',',

9:0*',

;)*$

9*<
=ω!
><
?ω!
$+
@(
VTS
VTS
VTS
I

U
Z
=
%100.

2
3
2
2
S
SS
I
II
k
ω
ωω
++
=

;',
',-ABC*=

DE',F-$G$#

H(&E$G(%

M¹ch t¸ch sãng biªn ®é dïng
m¹ch chØnh lu

Tách sóng nối tiếp


!D*&CI-AGJ& 
5(,K@'LC*

MH(N**015MO'P$(0Q
'R OM9:*%09:ả
$%(

9+','đ

SOT%Uτ45H
VVτ45HVV

Tách sóng song song
R
C
D
D
C
R
t
ω
1
S
ω
1
WXτ1H1#0/=
+'Y/Z*[(8\
$9M$Z']$
01',$0*^()*

Wτ$[+1Q&$9[
01&\'*+$*
0*

M¹ch t¸ch sãng biªn ®é dïng
m¹ch chØnh lu

D

'
U
D
I
D
i
D
9 ả

T¸ch sãng dïng m¹ch nh©n t¬ng tù

!._%

20*(^

'
'
4
(
`W(*ω
!

#*ω



  4 (*ả ω

Wϕ#

9+(ađ 94
'


3
94

DE(OZ$Q-A$ữ

Xb@)

9*$L$9Z$ ả ZO

$ c0*0*/=$ %d'T% ả ả
+8'

!*01',&E&*&C',$L
A$:9.
)2cos()
2
cos1
(.cos)cos1(

2
.
2
2
ϕω
ω
ϕω
+
+
++ t
tm
UKtm
UK
t
S
mtS
mt
ϕω
cos)cos1(
2
.
2
''
tm
UK
u
S
mt
S
+=

T¸ch sãng tÝn hiÖu ®¬n biªn

!   ơ đồ ố

.'-ABU(
0e

.'01%ω

Wω

0[$M
01%ω

f',&*,,I-A-0*=0*
+(9a=%$
ω

0%*=ω

Wω



;OZ$a*'P$%*Ie
gω


;

0e
2ω
t
+ω
s
ω
t
ω
t
+ ω
s
ω
s
hOZ
$
ω
s

T¸ch sãng tÝn hiÖu ®iÒu
T¸ch sãng tÝn hiÖu ®iÒu
tÇn vµ ®iÒu pha
tÇn vµ ®iÒu pha

9\'L,
%/U+8*01%9
'\'$:9

0$-U-AB
C*(,9*N^


iL*c$'
9_B',

iL,9,@
9_B,9,@U(
$^

h(*%'(C*%+(,
',*&*,U%0e $RhhI$%ữ
$

Mạch tách sóng biên độ để tách
sóng tần số

Mạch tách sóng pha cân bằng dùng diode

Mạch tách sóng tần số dùng mạch lệch cộng h
ởng

Mạch tách sóng tần số dùng cộng hởng ghép

Tách sóng tỉ số.

Mạch tách sóng Koinridenz

Vßng khãa pha PLL
Vßng khãa pha PLL
(Phase Locked Loop)
(Phase Locked Loop)


!._%.'[+(,0e*$Rhh

RCDCC*9i,$*9$M,0*$
+=0*

hRji,OZ$B/k*%
$)%*

l($mC93O

7Hni,&*,%Q'T$
g$Q0%$[
Phase
Detector
LPF
Amplifier
VCO
f
r
f
o
V
p

Vßng khãa pha PLL
Vßng khãa pha PLL
(Phase Locked Loop)
(Phase Locked Loop)
2*,


iRhh9*9Z*I7Hn
&*,%B&*m
*


7\m
*
-U01%(m
9
',
$a*9$Q7
$

',7Hn

7
$
a-AOI0-7HnQ
L%7Hn**m
*
4m
9
hdRhh:
9*$

Vßng khãa pha PLL
Vßng khãa pha PLL

ω
9

hOZ$
o3
;&*,
7Hn
;

9

9
p$
ω
0
pω"
9

&

&
43
&

0
"
9
"
9
ω"
9
4ω
9

6X

0
ω
0
±ω"
9
ω
0
$

nguyªn t¾c Ho¹t ®éng
nguyªn t¾c Ho¹t ®éng
Vßng khãa pha PLL
Vßng khãa pha PLL

3Z0*I9',*$
&
4qI7Hn&*,%
9m
q


30*',$a*$0*0*

9
"S$9',$
&
43
&


0

9
"

i,!R(^
 B#:=$%ω
0
pω
9
"
#0ω
0
Wω
9
"
#

r',OZ$hRje$%ω
0
pω
9
"
#!-A


$%ω
0
pω

9
"
#aQ%9
+7Hn**ω
0
pω
9
"
#q

Xω
0
pω
9
"
#1hRjZO-A\7Hna&*,01%
9m
*


3ω
0
pω
9
"
#9.0*&[Z+',OhRj\7Hn'Nb
QRhh(09*s&['NtRhhb$,_',

sD[gtRhhg-A0,_','L%0*

øng dông Vßng khãa pha
øng dông Vßng khãa pha
PLL
PLL



LA$%

S_',%

T¸ch sãng tÝn hiÖu ®iÒu tÇn

HO%&*,B&*7Hn'T%[ω
*
4ω


&


hOZ$
o3
;&*,
7Hn
;
ω
9
[
j;

ω
0
pω"
9

&

&
43
&

0
"
9
"
9
ω"
9
4ω
9
6X

0
ω
0
±ω"
9
;&[j;&ERhh
ω
0

$
8
j;

Tæng hîp tÇn sè
hOZ$
o3
;&*,
7Hn
;
X`
m
9
4Xm06;
;
;`
m

;LA$%&ERhh
$
m
0

§ång bé tÇn sè
;&*
,
7Hn
m
9
4m


m

;_',%&ERhh
$
hOZ$
o3