TDA4472-A Datasheet, PDF (2/14 Pages) TEMIC Semiconductors – Video-IF (VIF) with FPLL Demodulation and Quasi Parallel Sound (QPS) Processing

TDA4472-A
TELEFUNKEN Semiconductors
Offset
comp.
(optional)
Loop
filter
VCO
ÏÏAFC
switch
ϲ⁶
FPL
L
VIF
C_AGC
VIF amp
67_ÏÏÏ
8
Ï _AGC
Ï (VIF)
Ï ÏÏ Ï ¹⁸
20
21
0°
VCO
+
90° _{phase shift}
Video
det.
ÏϹ⁹
ÏÏ _AFC
22
AFC
ÏϹ²
Video
Ï^4,9,16
Tuner
11
ÏÏÏ₁₀
Tuner
AGC
Take over point
SIF 2
Ï ^{Input switch}
22783_{ÏÏÏÏÏÏ}
SIF 1
12_ÏÏÏ
5
ÏÏ _CAGC
SIF amp
AGC
(SIF)
FM det.
Supply
Ï ÏÏ 23
V_S
Ï17
C_Ref
Ï24
Intercarrier
(FM / NICAM)
94 8719
Figure 1. Block diagram
2 (14)
Rev. A1: 26.07.1995