LUMINANCE, CHROMA AND SYNCHRONIZING SIGNALS PROCESSOR IC FOR PAL / NTSC / SECAM COLOR TV
   
TB1274BFG integrates luminance, chroma and synchronizing signals processing circuits for PAL / NTSC / SECAM color TV system.
   
FEATURES
LUMINANCE SECTION
• Built-in chroma trap filter
• Y delay line
• Sharpness control
• Sub-Contrast control (-/+ 2dB)
• Black set-up
   
CHROMA SECTION
• Built-in 1H delay circuit (PAL / SECAM base band
    demodulation system)
• One crystal color demodulation circuit (4.43MHz,
    3.58MHz, M/N-PAL)
• Automatic system discrimination system and
    forced system mode
• 1H delay line also serves as comb filter in NTSC
    demodulation
• Built-in band-pass and take-off filter, SECAM bell
    filter
• Sub-Color control (-/+2dB)
   
SYNCHRONIZING SECTION
• Built-in horizontal VCO resonator
• Adjustment-free horizontal and vertical oscillation
    by count-down circuit
• Automatic vertical frequency discrimination
    circuit
• Noise detection circuit
   
OTHERS
• Y/C out level control
• 4-channels inputs switching
• 2-input circuit for RGB
• 2-input circuit for Y/Cb/Cr
• Y/Cb/Cr outputs
• Cb/Cr offset adjustment
• Built-in pre filters for A/D converter