tda4474-msd ATMEL Corporation, tda4474-msd Datasheet - Page 2

• Manufacturer Part Number: tda4474-msd
• Description: Multistandard Video-if And Quasi Parallel Sound Processing
• Manufacturer: ATMEL Corporation

Block Diagram
TDA4474
2 (16)
Tuner
Take over
point
SIF 2
SIF input switch
SIF 1
VIF 2
VIF 1
Ï
C
C
C
AGC
AGC
BL
Ï Ï Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï Ï Ï
Ï Ï
11
17
30
10
13
12
29
(optional)
7
8
5
3
1
2
6
Offset
comp.
Tuner
AGC
Ï Ï
28
FPLL
SIF amp
Loop
filter
AGC
(SIF)
(VIF)
AGC
Ï Ï
20
VIF amp
Figure 1. Block diagram
90
0
22
VCO
Ï Ï Ï
Video det.
phase shift
FM det.
AM det.
VCO
+
Supply
23
Standard
Control
AFC
Ï
16
and VIF input switch
L’ switch
94 7901
Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï
Ï Ï
Rev. A2, 04-Dec-98
14
15
25
19
27
21
26
4,9,18
24
(FM / NICAM)
C
Intercarrier
Ref
AF (AM)
Ï
Ï
Ï
Standard
AFC
switch
switch
Video
AFC
V
S