TELEFUNKEN Semiconductors
U4460BG
Video IF Amplifier with FPLL Demodulation
Description
The U 4460 BG is an integrated bipolar circuit for video
IF (VIF) signal processing in TV/VCR and multimedia
applications.
The circuit processes all TV video IF signals with
negative modulation (e.g. B/G standard).
Features
D
Active carrier generation by FPLL principle
D
Tuner AGC with adjustable take over point
D
5V supply voltage; low power consumption
D
Relevant pinning is compatible with the
(frequency–phase–locked–loop) for true
synchronous demodulation
D
Very linear video demodulation, good pulse
response and excellent intermodulation figures
D
VCO is operating on picture carrier frequency
D
Alignment–free AFC, no external reference circuit
D
VIF–AGC with peak sync detection
Offset
comp.
(optional)
Loop
filter
TDA 4474 /71 video–/sound IF combination
Package:
28 pin shrink–dual–inline–plastic (SDIP28)
VCO
FPLL
0°
90°
VCO
+
phase shift
AFC
5
VIF
VIF amp
Video det.
AGC
(VIF)
C
AGC
7
11
Take over point
Tuner
AGC
Supply
95 9815
Figure 1. Block diagram
Rev. A1: 15.08.1995
Preliminary Information
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Tuner 12
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6
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23
AFC
13
Video
24
V
S
3,8,17
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19
27
22
21
AFC
20 switch
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18
C
Ref
1 (9)
TEMIC [ TEMIC SEMICONDUCTORS ]
