ta1310ang TOSHIBA Semiconductor CORPORATION, ta1310ang Datasheet - Page 36

• Manufacturer Part Number: ta1310ang
• Description: Ntsc Video, Chroma, Deflection, And Distortion Compensation Ic With Yuv Interface And Acb
• Manufacturer: TOSHIBA Semiconductor CORPORATION

NOTE
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).
P
P
8
9
#56 Output Impedance
Black Stretching Amplifier
Maximum Gain
ITEM
SW
C
A
54
SW MODE
SW
B
B
A
↓
55
OPEN
OPEN
SW
56
1)
2)
3)
4)
5)
6)
1)
2)
3)
4)
5)
6)
Set the bus control data to the preset value.
Set SW
Connect the external power supply to #56 via ammeter A as shown in the diagram below.
Adjust the power supply until the ammeter reads 0 amperes.
Measure the ammeter current I56 when the power supply is increased by 0.1 V.
Calculate Z56 from the following formula.
Z56 = 0.1 [V] ÷ I56 [A]
Set the bus control data to the preset value.
Set the black stretch start point to 001, turn the Y mute off (0), set SW
TP54A.
Use #54 to adjust the signal amplitude to 0.1 V
Set SW
Set SW
Calculate G
G
BS
= V
54
55
55
B
÷ V
to C (connect the Y input to AC-GND).
to B (minimum gain) and measure the amplitude V
to A (maximum gain) and measure the amplitude V
BS
A
(TEST CONDITIONS V
from the following formula.
36
CC
MEASUREMENT METHOD
= 9 V / 5 V, Ta = 25 ± 3°C)
p-p
.
A
B
of #56.
of #56.
54
to A, and input a 500-kHz sine wave to
TA1310ANG
2005-09-20