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TDA4471 Datasheet

  • TDA4471

  • Multistandard Video-IF and Quasi Parallel Sound Processing

  • 16頁

  • TEMIC

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TELEFUNKEN Semiconductors
TDA4471
Multistandard Video-IF and Quasi Parallel Sound Processing
Description
The TDA4471 is an integrated bipolar circuit for full
multistandard video/sound IF (VIF/SIF) signal
processing in TV/VCR and Multimedia applications. The
circuit processes all TV video IF signals with negative
modulation (e.g. B/G standard), positive modulation
(e.g. L standard) and the AM, FM/NICAM sound IF
signals. Specially two video IF inputs (2 x VIF) in
combination with one sound IF input (1 x SIF) and the
common pinning with the TDA4474 gives flexibility to
design a universal IF module for various applications.
Features
D
5V supply voltage; low power consumption
D
Active carrier generation by FPLL principle
D
Intercarrier output signal is gain controlled
(necessary for digital sound processing)
D
Complete alignment鈥揻ree AM demodulator with
(frequency鈥損hase鈥搇ocked鈥搇oop)
synchronous demodulation
for
true
gain controlled AF output
D
Separate SIF鈥揂GC with average detection
D
Parallel operation of the AM demodulator and
D
Very linear video demodulation, good pulse
response and excellent intermodulation figures
D
VCO circuit is operating on picture carrier
QPS mixer (for NICAM鈥揕 stereo sound)
D
Two video IF inputs (2 x VIFin)
D
One sound IF input (1 x SIFin)
D
Package and relevant pinning is compatible with
frequency, the VCO frequency is switchable for
the L鈥?mode
D
Alignment鈥揻ree AFC without external reference
circuit, polarity of the AFC curve is switchable
D
VIF鈥揂GC for negative modulated signals
(peak sync detection) and for positive modulation
(peak white/black level detector)
D
Tuner AGC with adjustable take over point
D
Alignment鈥揻ree quasi parallel sound (QPS) mixer
the TDA4474; simplifies the design of an
universal IF module
Package:
30 pin shrink鈥揹ual鈥搃nline鈥損lastic (SDIP30)
for FM/NICAM sound IF signals
Rev. A1: 18.08.1995
Preliminary Information
1 (16)

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