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TB1239BF

Bi-CMOS Integrated Circuit Silicon Monolithic

Toshiba 

Preliminary

Bi-CMOS Integrated Circuit Silicon Monolithic

TB1239BF

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

Weight: 0.83 g (typ.)

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 I2C 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

1

2002-02-12

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