TA1276AFG Datasheet, PDF (63/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

Note
Parameter
A₄ Color γ Characteristics
TA1276AFG
SW₃₃
A
SW₃₄
A
SW₃₅
A
Test Conditions (unless otherwise stated, V_CC1 = 5 V, V_CC2/V_CC3/DEF V_CC = 9 V, Ta = 25 ± 3°C)
Switching Mode
SW₃₇ SW₃₈ SW₃₉ SW₅₁ SW₅₂ SW₅₃
Test Conditions
1) Set the subaddress (10) data to (20).
2) Input signal 2 to pin 1.
3) When the subaddress (07) data are:
(80) − γOFF
(82) − γ1ON
(84) − γ2ON
(86) − γ3ON
measure the changes in the amplitude level of the pin 43 output signal at
an increase the amplitude A of signal 2 and plot the characteristics.
4) Calculate the γON gradient ∆, using Vγ, which represents the point at
which the γ characteristics become effective, and the gradient of the linear
section with γOFF as (1).
A
A
A
B
B
C
γOFF
Vγ
γON
Pin 1 input
1) Measure the voltage of pin 1.
2) Set the subaddress (10) data to (20).
A₅ Color Limiter Characteristics
↑
↑
↑
↑
↑
↑
↑
A
↑ _{3) Input signal 2 (picture period amplitude = 0.4 Vp-p) to pin 80.}
4) Measure the picture period amplitude of the pin 11 output signal when the
subaddress (07) data are (80) and (81). (CLT0, CLT1)
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2002-04-01