TDA4471 Datasheet, PDF (2/16 Pages) TEMIC Semiconductors – Multistandard Video-IF and Quasi Parallel Sound Processing

TDA4471
Offset
comp.
(optional)
Loop
filter
VCO
TELEFUNKEN Semiconductors
Ï ^{L’ switch}
Ï ^{and VIF input switch}
VIF 2
10
Ï₁₁
ÏÏÏ⁶
VIF 1
Ï⁷
C_AGC
8
ÏÏÏ₁₇
C_BL
Tuner
13
ÏÏÏ₁₂
Take over
point
Ïϲ⁸ ÏÏ
FPLL
Tuner
AGC
Ïϲ⁰ÏÏ
0°
90°
ÏÏ ÏÏ ²²
23
VCO
+
phase shift
VIF amp
AGC
(VIF)
Video det.
FM det.
SIF 1
21^{ÏÏÏÏ}
SIF amp
AGC
(SIF)
ÏÏ⁵
C_AGC
AM det.
Figure 1. Block diagram
16
Control
21
AFC
ÏÏ Ï _switch
ÏÏ Ï ^AFC
24
ÏÏ ^AFC
ÏÏ14
Video
ÏÏ Ï ¹⁵
Standard
Standard
switch
25
V_S
ÏÏÏÏÏÏ Ï _Supply
19
C_Re
26^f
ÏÏÏÏ Intercarrier
(FM / NICAM)
29
n.c.
ÏÏ₃₀
ÏÏ_n.c.
ÏÏ₃
ÏÏ_n.c.
ÏÏÏÏÏϲ⁷
AF (AM)
ÏÏÏÏ^4,9,18
95 9702
2 (16)
Preliminary Information
Rev. A1: 18.08.1995