TA1360AFG_05 Datasheet, PDF (45/110 Pages) Toshiba Semiconductor – YCbCr/YPbPr Signal and Sync Processor for Digital TV, Progressive Scan TV and Double Scan TV

Note No.
Characteristics
P03 Black stretch start point 1
TA1360AFG
Test Conditions
SW Mode
SW71 SW70 SW68 SW64 SW74
Test Method (Test condition: V_CC = 9 V/2 V, Ta = 25 ± 3°C)
A
A
C
B OPEN 1. Set SW70 to A (maximum gain), and black stretch point 1 to OFF (000). Apply 0 V to #71.
2. Connect external power supply PS to #68, increase voltage from V₃, and plot #74 voltage change S1. The
#74 voltage is set as V₀ when V₃ is applied, and as V₁₀₀ when V₃ + 0.7 V is applied.
3. Set black stretch point 1 to minimum (001), increase PS voltage from V₃, and then plot #74 voltage change
S2.
4. Set black stretch point to maximum (111), repeat 3 above, then plot #74 voltage change S3.
5. Determine intersection points of S1, S2 (V_BST1), and S3 (V_BST2) as shown in the figure below. Also
calculate P_BST1 and P_BST2 using following equations.
V_Z [V] = V₁₀₀ [V] − V₀ [V]
P_BST1 [(IRE)] = [(V_BST1 [V] − V₇₄ [V]) ÷ V_Z] × 100 (IRE)
P_BST2 [(IRE)] = [(V_BST2 [V] − V₇₄ [V]) ÷ V_Z] × 100 (IRE)
#74
S3
V_BST2
S1
V_BST1
V₇₄
S2
#68
45
2005-08-18