TDA9725 データシートの表示（PDF） - Philips Electronics
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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
kΩ 10
47 µF
nF
1HDL
CCD
1 µF
VTC VFC
YNR CSS
22 nF
SYNC
CAGC
4.7 µF
52 51 50 49 48
47 46
45
44
HSS
50 kΩ
SYNC
SEPARATOR
CVBSI
4.7 µF
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
µF
µH
µF
42
41
40
A
NOISE
CLIP
YNR
PROCESSOR
YNR
MIXER
PB
50
kΩ
Y/C
MIXER
SCL
CHARACTER
INSERT
EDIT
EDIT
25 kΩ EDIT
50 kΩ
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
µF
(1)
TP2
CDEV
4
1 kΩ
270 Ω
5
MEO
6
22
nF
1 nF
5% SQPB CCLP3
NFB
7
0.1 µF
1.5 kΩ
CF0E
8
MDEC
470 Ω
680 pF
5%
peaking
9
MDEB
1.5 kΩ
0.1
µF
10
11
1 kΩ
FMO
VCC(FM)
50 kΩ
pin 14
HIGH
12
13
14
PTR
0.01
µF
FMI
0.33
µF
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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