TDA4504B Description
TDA4504B Having the capability to demodulate IF signals with either positive or negative-going video information, the TDA4504B (Fig.1) is contained within a 32 pin encapsulation. It includes a three-stage vision IF amplifier, mute circuit, AFC and AGC circuitry, fully synchronised horizontal and vertical timebases with drive circuits and integral three-level sandcastle pulse generator. A functional colour tv...
TDA4504B Key Features
- Gain controlled vision IF amplifier
- Synchronous demodulator for negative and positive demodulation
- AGC detector operating on peak sync amplitude for negative demodulation and on peak white level for positive demodulatio
- Tuner AGC
- AFC circuit with two control polarities and on/off-switch
- Video preamplifier
- Video switch to select either the internal video signal or an external video signal
- Horizontal oscillator and synchronization circuit with two control loops
- Vertical synchronization (divider system), ramp generator and driver with automatic amplitude adjustment for 50 and 60 H
- Transmitter identification (mute)