GENERAL DESCRIPTION
The TDA9812/T is an integrated circuit for multistandard vision IF signal processing and AM and FM sound demodulation in TV and VTR sets.

FEATURES
• 5 V positive supply voltage
• Gain controlled wide band VIF-amplifier (AC-coupled)
• True synchronous demodulation with active carrier regeneration (very linear demodulation, good intermodulation figures, reduced harmonics, excellent pulse response)
• Gated phase detector for L/L accent standard
• VCO frequency switchable between L and L accent (alignment external) picture carrier frequency
• Separate video amplifier for sound trap buffering with high video bandwidth
• VIF AGC detector for gain control, operating as peak sync detector for B/G (optional external AGC) and peak white detector for L; signal controlled reaction time for L
• Tuner AGC with adjustable Take Over Point (TOP)
• AFC detector without extra reference circuit
• AC-coupled limiter amplifier for sound intercarrier signal
• Alignment-free FM-PLL demodulator with high linearity, switchable de-emphasis for FM
• AM-SIF AGC detector for gain controlled SIF amplifier
• AM demodulator without extra reference circuit
• Stabilizer circuit for ripple rejection and to achieve constant output signals.