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Número de pieza
componentes Descripción
TDA9725 Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
componentes Descripción
Fabricante
TDA9725
Y/C automatic adjustment processor (VHS standard)
Philips Electronics
TDA9725 Datasheet PDF : 44 Pages
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Philips Semiconductors
Y/C automatic adjustment processor
(VHS standard)
BLOCK DIAGRAM
Product specification
TDA9725
handbook, full pagewidth
LPNC GND(Y)
CCCD
1.3
k
Ω
10
47
µ
F
nF
1HDL
CCD
1
µ
F
VTC VFC
YNR CSS
22 nF
SYNC
CAGC
4.7
µ
F
52 51 50 49 48
47 46
45
44
HSS
50 k
Ω
SYNC
SEPARATOR
CVBSI
4.7
µ
F
43
to BPF 4.43
AGC
LPF
CCD
AGC
CLAMP
2
CLAMP
1
DOP
AGC
DETECTOR
CLPA
REC
PB
REC
CHI
CVBSO
VCC(Y)
0.1
22
10
µ
F
µ
H
µ
F
42
41
40
A
NOISE
CLIP
YNR
PROCESSOR
YNR
MIXER
PB
50
k
Ω
Y/C
MIXER
SCL
CHARACTER
INSERT
EDIT
EDIT
25 k
Ω
EDIT
50 k
Ω
1.6 V
NOISE
CANCELLER
1
PICTURE
to pin 6
CLAMP
3
DEVIATION/PLAYBACK
DETECTOR
ME
SQPB
CLPB
W/DC
DEVIATION
CONTROL
REC
PB
MODULATOR
NLDE
YLPF
PB REC
NLE
DTE
PB
REC
PB
2.5 dB
SQPB
f0
PROCESSOR
FM DEMODULATOR
SUBLPF
DOUBLE
LIMITER
PB
TDA9725
DROP-OUT
DETECTOR
ENVELOPE
DETECTOR
DOP
GATE
FM
AGC
to CLP3
12
3
PCTL
4.7
µ
F
(1)
TP2
CDEV
4
1 k
Ω
270
Ω
5
MEO
6
22
nF
1 nF
5% SQPB
CCLP3
NFB
7
0.1
µ
F
1.5 k
Ω
CF0E
8
MDEC
470
Ω
680 pF
5%
peaking
9
MDEB
1.5 k
Ω
0.1
µ
F
10
11
1 k
Ω
FMO
VCC(FM)
50 k
Ω
pin 14
HIGH
12
13
14
PTR
0.01
µ
F
FMI
0.33
µ
F
CFMA
MGB694
(1) Low leakage current.
All capacitors for loop filter
±
10%; all other capacitors +10%/
−
50%; all resistors
±
5%; all inductors
±
10%; unless otherwise specified.
Fig.1 Block diagram (continued in Fig.2).
1996 Oct 14
3
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