參數(shù)資料
型號(hào): TDA4474
英文描述: Multistandard Video-IF and Quasi Parallel Sound Processing
中文描述: 多標(biāo)準(zhǔn)視頻中頻和準(zhǔn)并行聲音處理
文件頁數(shù): 2/18頁
文件大小: 295K
代理商: TDA4474
TELEFUNKEN Semiconductors
TDA4474
Preliminary Information
Rev. A1: 17.08.1995
2 (17)
VCO
+
phase shift
AGC
(VIF)
Tuner
AGC
switch
AGC
(SIF)
8
13
Tuner
1
5
SIF 2
SIF 1
AFC
Standard
Supply
L’ switch
and VIF input switch
VCO
23
22
Loop
filter
16
Offset
comp.
(optional)
FPLL
0
°
90
°
VIF amp
6
VIF 1
C
AGC
C
BL
Take over
point
SIF input switch
C
AGC
24
14
25
V
S
C
Ref
Intercarrier
(FM / NICAM)
26
FM det.
AM det.
SIF amp
27
AF (AM)
AFC
Video
94 7901
Video det.
Control
21
AFC
switch
VIF 2
Figure 1. Block diagram
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