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U4460BG Datasheet, PDF (1/9 Pages) TEMIC Semiconductors – Video IF Amplifier with FPLL Demodulation
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
(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
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 video–/sound IF combination
Package:
28 pin shrink–dual–inline–plastic (SDIP28)
Offset
comp.
(optional)
Loop
filter
VCO
ÏÏÏÏ ÏÏÏÏ 3,8,17
27
FPLL
1ÏÏ9 ÏÏ 2ÏÏ2 ÏÏ ÏÏ21
0°
VCO
90°
+
phase shift
VIF ÏÏÏ65 ÏÏÏ
ÏÏÏÏ CAGC 7
Tuner 12
ÏÏÏÏÏÏ 11
Take over point
VIF amp
AGC
(VIF)
Tuner
AGC
Video det.
Figure 1. Block diagram
AFC
20 switch
ÏÏ Ï AFC
23
ÏÏÏÏ AFC
ÏÏ13
Video
ÏÏÏÏÏÏ ÏÏ Supply
24 V
S
18
95 9815
CRef
Rev. A1: 15.08.1995
Preliminary Information
1 (9)