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TB1239BF Datasheet

  • TB1239BF

  • Bi-CMOS Integrated Circuit Silicon Monolithic

  • 26頁

  • TOSHIBA

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TB1239BF
Preliminary
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.
Weight: 0.83 g (typ.)
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 I
2
C BUS line.
Features
Luminance Section
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Built-in chroma trap filter
Black stretch circuit
DC restoration circuit
Y delay line
Sharpness control
Sub-Contrast control (鈭?+2dB)
Black set-up for PAL plus
Chroma Section
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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 (鈭?+2dB)
Synchronizing Section
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Built-in horizontal VCO resonator
Adjustment-free horizontal and vertical oscillation by count-down circuit
Automatic vertical frequency discrimination circuit
Noise detection circuit
1
2002-02-12

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