TDA4470-M Datasheet, PDF (2/16 Pages) TEMIC Semiconductors – Multistandard Video-IF and Quasi Parallel Sound Processing

TDA4470-M
Block Diagram
Offset
comp.
(optional)
Loop
filter
VCO
ÏÏ_{L’ switch}
VIF
76^ÏÏÏ
C_AGC
8
ÏÏÏ₁₅
C_BL
Tuner
Take over
11
ÏÏÏÏ₁₀
point
SIF 2
27
ÏÏÏ₂₈
SIF input
ÏÏ^switch
3_ÏÏ
SIF 1
21^ÏÏÏ
Ï⁵
C_AGC
Ï Ï ÏÏ ÏÏ ²⁶
18
20
21
FPLL
VCO
0°
+
90° _{phase shift}
VIF amp
AGC
(VIF)
Tuner
AGC
SIF amp
Video det.
Supply
FM det.
AGC
(SIF)
AM det.
Figure 1. Block diagram
Ϲ⁴
Control
AFC
19
AFC
Ï ÏÏ_switch
Ï ÏÏ ₂₂
ÏÏ ^AFC
ÏϹ²
Video
13
ÏÏ ÏÏÏÏ Standard
Standard
switch
23
Ï ÏÏ_VS
Ï ÏÏ ₁₇
ÏÏ _CRef
24
ÏÏ Intercarrier
(FM / NICAM)
Ïϲ⁵
AF
(AM)
Ï ^4,9,16
95 10851
2 (16)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A2, 15-Oct-96