參數(shù)資料
型號: TDA4472-A
英文描述: Video-IF (VIF) with FPLL Demodulation and Quasi Parallel Sound (QPS) Processing
中文描述: 視頻中頻(資料表格)與FPLL解調(diào)和準(zhǔn)并行聲音(計分制)加工
文件頁數(shù): 8/14頁
文件大?。?/td> 169K
代理商: TDA4472-A
Rev. A1: 26.07.1995
8 (14)
1.
This parameter is given as an application information
and not tested during production.
In VCR mode the VIF- and SIF path is switched off.
Adjustment of turn over point (delayed tuner AGC)
with external resistor R
top
or external voltage V
top
possible.
The oscillator drift is related to the picture carrier fre-
quency, at external temperature-compensated LC
circuit.
1.07) = 20 log (4.43 MHz component/1.07 MHz
component); (1.07) value related to black-white
signal input signal conditions:
picture carrier
colour carrier
sound carrier
2.
3.
4.
5.
0 dB
–6 dB
–24 dB
6.
automatically selected.
7.
Without control voltage at pin 19 the ”on” mode is
SC
= 33.16 MHz;
PC/SC
1
= 13 dB; PC/SC
2
= 20 dB; PC unmodulated
(equivalent to sync peak level).
8.
Without control voltage at Pin 3 SIF input 1 is
automatically selected.
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
5
4
6
7
8
9
10
11
12
13
14
6.8 pF
L
VCO
C
VCO
Loop
filter
150
470 nF
AFC
switch
AFC
+V
S
Intercarrier
(FM/NICAM)
10 k
Loop
comp.
SIF 2
C
Ref
2.2 F
10 k
Tuner
delay
Tuner
AGC
Video
AGC (VIF)
VIF
AGC (SIF)
SIF
Input switch
SIF 1
9
TDA4472
NC
NC
10 F
2.2 F
NC
NC
*)
External L/C circuit (VCO: 38.9 MHz) with TOKO coil 7KN (9 turns,
0.12 mm)
Figure 3. Test circuit
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