Description
The TDA4472 is an integrated bipolar circuit for 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), and the FM/NICAM sound IF signals.

FEATUREs
● 5 V supply voltage; low power consumption
● Active carrier generation by FPLL principle
   (frequency-phase-locked-loop) for true
   synchronous demodulation
● Very linear video demodulation, good pulse response
   and excellent intermodulation figures
● VCO circuit operates at picture carrier frequency
● Alignment-free AFC without external reference
   circuit, polarity of the AFC curve is switchable
● VIF-AGC with peak sync. detection
● Tuner AGC with adjustable take over point
● Alignment-free quasi parallel sound (QPS) mixer for
   FM/NICAM sound IF signals
● Intercarrier output signal is gain controlled (necessary
   for digital sound processing)
● Separate SIF-AGC with average detection
● Two independent SIF inputs
● Package and relevant pinning is compatible with the
   multistandard version TDA4470, which simplifies the
   design of an universal IF module