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| TA1201CNG Datasheet, PDF (29/46 Pages) Toshiba Semiconductor – I2C BUS CONTROL NTSC 1CHIP COLOR TV IC | |||
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TA1201CNG
NOTE
ITEM
37 Black Expansion Amp.
Gain
Black Expansion Start
Point
TEST CONDITION (VCC = 9V, Ta = 25±3°C)
BUS MODE
(00) (02) (03) (04) (0B) (0C) (0D)
MEASUREMENT METHOD
(00) (00) (40) (20) (80) (80) (80)
(1) Apply 1Vp-p video signal as follows to video input.
(2) Measure the start point and amp gain of Black expansion at pin 19.
38 DC Restoration
39 Sharpness Control
Characteristics
â â Ad- â
â
â
â
just
â â (40) Ad- â
â
â
just
(1) TV Mode
: Apply input signal 1 (f0 = 10kHz 0.5Vp-p) to pin 37.
External Mode : Apply input signal 1 (f0 = 10kHz 0.5Vp-p) to pin 39.
(2) Make pin 42 open. Adjust the data of sub-address (03) so that the output signal
amplitude at pin 21 become 0.5Vp-p.
(3) Measure the pedestal level at pin 21 when no luminance signal is input. (âY)
TCD = (âY / 0.5V)Ã100% [%]
(1) Apply input signal 1 (20mVp-p) to pin 39.
(2) Set the data of sub-address (04) is (3F)
(3) Measure the output signal amplitude at B out when the signal (f0 = 10kHz) is
applied (V10K) and when the signal (f0 = 4MHz) is applied (VPK).
GSHMAX = 20âog (VPK / V10K)
(4) Set the data of sub-address (04) is (00)
(5) Measure the output signal amplitude (VPK) at B output when the signal (f0 =
2.4MHz) is applied.
GSHMIN = 20âog (VPK / V10K)
(6) Set the data of sub-address (04) is (20)
(7) Measure the output signal amplitude (VPK) at B output when the signal (f0 =
4.0MHz) is applied.
GSHCENT = 20âog (VPK / V10K)
29
2004-05-24
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