Description
TDA4570
The TDA4570 is an integrated 3,58 MHz or 4,43 MHz NTSC decoder.It is pin sequence compatible with multi-standard decoder TDA4555 and pin compatible with the PAL decoder TDA4510.
Features
- Chrominance part.
- Gain controlled amplifier with operating point control stage.
- ACC (automatic chrominance control) with sampled rectification during burst-key signal.
- Blanking circuit for the colour burst signal Oscillator and control voltage part.
- Voltage controlled reference oscillator for double subcarrier frequency.
- Divider stages which provide the correct 90° phase between.
- (R-Y) and.
- (B-Y) reference signals for the demodulators.
TDA4570_PhilipsSemiconductors.pdf
