TDA4504B - NXP

TDA4504B Small signal combination for multistandard colour TV

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-lev.

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 demodulation
• 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 6.