TDA956XPS
Description
The various versions of the TDA955X/6X/8X PS/N1 series combine the functions of a video processor together with a µ-Controller and US Closed Caption decoder. Several versions have a Teletext decoder on board.
Key Features
- FEATURES TV-signal processor
- Multi-standard vision IF circuit with alignment-free PLL demodulator
- Internal (switchable) time-constant for the IF-AGC circuit
- A choice can be made between versions with mono intercarrier sound FM demodulator and versions with QSS IF amplifier. In the QSS versions without East-West output an AM/FM mode can be activated. In that case both the QSS amplifier (for AM demodulation) and the FM demodulator are available.
- The mono intercarrier sound circuit has a selective FM-PLL demodulator which can be switched to the different FM sound frequencies (4.5/5.5/6.0/6.5 MHz). The quality of this system is such that the external band-pass filters can be omitted.
- The FM-PLL demodulator can be set to centre frequencies of 4.74/5.74 MHz so that a second sound channel can be demodulated. In such an application it is necessary that an external bandpass filter is inserted.
- The QSS amplifier and mono intercarrier sound circuit of some versions can be used for the demodulation of FM radio signals
- Source selection between the ‘internal’ CVBS and one external CVBS or Y/C signal
- Integrated chrominance trap circuit
- Integrated luminance delay line with adjustable delay time
