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U4460BG Datasheet, PDF (1/9 Pages) TEMIC Semiconductors – Video IF Amplifier with FPLL Demodulation | |||
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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
(frequencyâphaseâlockedâloop) 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 Alignmentâfree AFC, no external reference circuit
D VIFâAGC with peak sync detection
D Tuner AGC with adjustable take over point
D 5V supply voltage; low power consumption
D Relevant pinning is compatible with the
TDA 4474 /71 videoâ/sound IF combination
Package:
28 pin shrinkâdualâinlineâplastic (SDIP28)
Offset
comp.
(optional)
Loop
filter
VCO
ÃÃÃÃ ÃÃÃÃ 3,8,17
27
FPLL
1ÃÃ9 ÃÃ 2ÃÃ2 ÃÃ ÃÃ21
0°
VCO
90°
+
phase shift
VIF ÃÃÃ65 ÃÃÃ
ÃÃÃÃ CAGC 7
Tuner 12
ÃÃÃÃÃÃ 11
Take over point
VIF amp
AGC
(VIF)
Tuner
AGC
Video det.
Figure 1. Block diagram
AFC
20 switch
ÃÃ Ã AFC
23
ÃÃÃÃ AFC
ÃÃ13
Video
ÃÃÃÃÃÃ ÃÃ Supply
24 V
S
18
95 9815
CRef
Rev. A1: 15.08.1995
Preliminary Information
1 (9)
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