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TB1239BF
Luminance, Chroma and Synchronizing Signals Processor IC for PAL/NTSC/SECAM COLOR TV
TB1239BF Bi-CMOS Integrated Circuit Silicon Monolithic
TB1239BF Luminance, Chroma and Synchronizing Signals Processor IC for PAL/NTSC/SECAM COLOR TV
TB1239BF integrates luminance, chroma and synchronizing
signals processing circuits for PAL/NTSC/SECAM color TV
system.
TB1239BF incorporates high performance picture quality
compensation circuits in luminance section, an automatic
PAL/NTSC/SECAM discrimination and decode circuits in chroma
section, and an automatic 50/60 Hz discrimination circuit in
synchronizing section.
Besides a crystal oscillator generates 4.43 MHz, 3.58 MHz and
M/N-PAL clock signals internally for color demodulation. A
horizontal PLL circuit is also built in this IC.
PAL/SECAM demodulation circuits which are adjustment-free
circuits incorporates a 1 H DL circuit inside for operating the
base band signal processing system.
Also, TB1239BF makes it possible to set and to control various functions through the built-in I2 C BUS line.
Features
Luminance Section Built-in chroma trap filter Black stretch circuit DC restoration circuit Y delay line Sharpness control Sub-Contrast control (−/+2dB) Black set-up for PAL plus
Chroma Section Built-in 1 H delay circuit (PAL/SECAM base band demodulation system) One crystal color demodulation circuit (4.43 MHz, 3.58 MHz, M/N-PAL) Automatic system discrimination system and forced system mode 1 H 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
Weight: 0.83 g (typ.)
