TC90A45F - NTSC 2-LINE DIGITAL Y/C SEPARATION
(1) Input clamp (CLAMP) This is sync tip clamp circuit for composite signal.
This circuit makes feedback so that the min.
data after A / D converter at Y / C separation equal to internal DC bias level.
(2) A / D converter (ADC) This is high speed series-parallel 8 bit A / D converter (Dynamic Range
TC90A45F Features
* TV system : NTSC PLL4 × multiplication circuit sync. tip clamping circuit Internal 8 bit A / D converter Internal 8 bit D / A converters (2 ch.) 1 H line memory Dynamic comb filter Color killer mode (Y / C separation OFF) DIP16 / SOP16 pack
