TA1276AFG Datasheet, PDF (64/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

TA1276AFG
Note
Parameter
A₆ High-Brightness Color Gain
A₇ Flesh Color Characteristics
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 subaddress (10) data to (20).
2) Input signal 2 (picture period amplitude = 0.2 V_p-p) to pin 80.
3) Adjust the color control so that the picture period amplitude output from pin
A
A
A
B
A
C
15 is 1.2 V_p-p.
4) Measure the picture period amplitude of the pin 15 output signal when the
subaddress (06) data are (FF). (V₄₁)
5) HBC1 = (1.2 − V₄₁)/1.2
1) Input IQ demodulated flesh-bar signals (15°-step rainbow signals in the
range −30° to +240°) to pin 80 (Q signal) and pin 1 (I signal) as 0.2 Vp-p.
Set the brightness to maximum.
2) Set subaddress (10) data to (00).
3) Measure the signals output from pins 11 and 15 and switch to subaddress
(10) data to (06). Measure the output signals and calculate the variation
characteristics of the color vector phase.
4) Draw the vector variation characteristics curve showing the on state from
the off state and calculate the gradient in the vicinity of the I axis as Fa33.
Subaddress (08)
Data (80) off
Data (81) on
↑
↑
↑
↑
↑
↑
A
↑
↑
Color vector phase [°]
OFF
ON
Fa
Chroma input phase [°]
64
2002-04-01