U4479B

` 5 V supply voltage; low power consumption
` DVB signal processing with a converter for the 2nd IF;VCO is controlled by an external PLL
` Active carrier generation by FPLL principle (frequency-phase-locked-loop) for true synchronous demodulation in the "analog mode"
` Switchable VCO frequency (33.4/38.9/43.0 MHz)
` Very linear video demodulation, good pulse response and excellent intermodulation figures
` Bandwidth of the output signal 10 MHz (1 dB) in DVB mode
` Alignment-free AFC
` AGC for negative modulation signals (peak sync detection) and for positive modulation (peak white/black level detector)
` AGC with average detection for the QAM modulated DVB signal, reference level is adjustable
` Tuner AGC with adjustable take over point
` Alignment-free quasi parallel sound (QPS) mixer for FM/NICAM sound IF signals
` Complete alignment-free AM demodulator with gain controlled AF output
` Separate SIF-AGC with average detection
` Parallel operation of the AM demodulator and QPS mixer (for NICAM-L stereo sound)
` Two IF inputs for DVB-/Analog Video IF
` One sound IF input

The U4479B is a bipolar circuit for the processing of cable DVB IF (Digital Video Broadcasting) and multistandard analog TV IF signals. The combi circuit processes QAM modulated IF signals, all TV video IF with negative/ positive modulation and the FM/ NICAM,AM sound IF signals. With 5 V supply voltage the U4479B is suitable for cable DVB receiver (set top boxes).