TA1310ANG Datasheet, PDF (39/106 Pages) Toshiba Semiconductor – NTSC VIDEO, CHROMA, DEFLECTION, AND DISTORTION COMPENSATION IC (WITH YUV INTERFACE AND ACB)

TA1310ANG
NOTE
ITEM
P₁₃
DC Restoration Rate
Compensation Amp Gain
SW MODE
SW₅₄ SW₅₅ SW₅₆
1)
2)
3)
4)
5)
6)
7)
OPEN
C
B
↓
ON
(TEST CONDITIONS V_CC = 9 V / 5 V, Ta = 25 ± 3°C)
MEASUREMENT METHOD
Set the bus control data to the preset value.
Connect #54 to an external power supply (PS).
Turn the Y mute off (0), set the unicolor to the center (100000), set the brightness to the center (1000000), set
RGB cutoff to the center (10000000), and observe #13 (R_OUT).
Use unicolor to adjust the difference in the #13 picture period DC level to 0.7 V when the power supply is set to
V₅₄ and V₅₄+0.7 V.
Applying V₅₄+0.7 V to #54 as shown in the diagram below, calculate∆V₁ of #13, then calculate∆V₂ of #13 when
SW₅₆ is on.
Connect a 2-kΩ resistor between #56 and C56 (1 µF) and calculate ∆V₃ of #13.
Calculate GDTC and GDTR from the following formula.
GDTC = ((∆V₂ [V] −∆V₁ [V]) + 0.7 [V]) ÷ 0.7 [V]
GDTR = ((∆V₃ [V] −∆V₁ [V]) + 0.7 [V]) ÷ 0.7 [V]
Note 1: When testing, see the picture sharpness test circuit diagram. First turn ACB mode off (bus control).
Note 2: Ensure the composite signal is always input to pin 38 (SYNC IN).
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2005-09-20