TB1227CNG Datasheet, PDF (1/94 Pages) Toshiba Semiconductor – VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC / SECAM SYSTEM COLOR TV

TENTATIVE
TOSHIBA Bi-CMOS INTEGRATED CIRCUIT
SILICON MONOLITHIC
TB1227CNG
TB1227CNG
VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC
/ SECAM SYSTEM COLOR TV
TB1227CNG that is a signal processing IC for the PAL / NTSC /
SECAM color TV system integrates video, chroma and
synchronizing signal processing circuits together in a 56-pin
shrink DIP plastic package.
TB1227CNG incorporates a high performance picture quality
compensation circuit in the video section, an automatic PAL /
NTSC / SECAM discrimination circuit in the chroma section, and
an automatic 50 / 60Hz discrimination circuit in the
synchronizing section. Besides a crystal oscillator that internally
generates 4.43MHz, 3.58MHz and M / N-PAL clock signals for
color demodulation, there is a horizontal PLL circuit built in the
Weight: 5.55 g (typ.)
IC.
The PAL / SECAM demodulation circuit which is an adjustment-free circuit incorporates a 1H DL circuit inside for
operating the base band signal processing system.
Also, TB1227CNG makes it possible to set or control various functions through the built-in I²C bus line.
FEATURES
Video section
• Built-in trap filter
• Black expansion circuit
• Variable DC regeneration rate
• Y delay line
• Sharpness control by aperture control
• γ correction
• VSM output
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 forced mode
• 1H delay line also serves as comb filter in NTSC demodulation
• Built-in band-pass filter, SECAM bell filter
• Color limiter circuit
• Fsc output
Synchronizing deflecting section
• Built-in horizontal VCO resonator
• Adjustment-free horizontal / vertical oscillation by count-down circuit
• Double AFC circuit
• Vertical frequency automatic discrimination circuit
• Horizontal / vertical holding adjustment
• Vertical ramp output
• Vertical amplitude adjustment
• Vertical linearity / S-shaped curve adjustment
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2004-05-24