Description

The TDA4470 is an integrated bipolar circuit for multi standard 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.

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, the VCO frequency is switchable for L’-mode

• Alignment-free AFC without external reference circuit, polarity of the AFC curve is switchable

• VIF-AGC for negative modulated signals (peak sync. detection) and for positive modulation (peak white/ black level detector)

• Tuner AGC with adjustable take over point

• Alignment-free quasi parallel sound (QPS) mixer for 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, the VCO frequency is switchable for L’-mode

• Alignment-free AFC without external reference circuit, polarity of the AFC curve is switchable

• VIF-AGC for negative modulated signals (peak sync. detection) and for positive modulation (peak white/black level detector)

• Tuner AGC with adjustable take over point

• Alignment-free quasi parallel sound (QPS) mixer for FM/NICAM sound IF signals