TA1275BFNG Datasheet, PDF (16/21 Pages) Toshiba Semiconductor – SECAM Demodulator Processor

Note
Item
10 Killer ON/OFF Level
11 Black Level Offset
12 ID Voltage
TA1275BFNG
Test Condition
(1) : Input a 75% color bar (200 mV_p-p at R ID) into Pin 20.
(2) : Decreasing the input amplitude, measure the amplitude at which
demodulated outputs disappear at Pin 9 and Pin 11, that is, "e_SK".
(3) : Increasing the input amplitude from 0 mV_p-p, measure the amplitude at which
demodulated outputs appear at Pin 9 and Pin 11, that is, "e_SC".
(1) : Input a 200 mV_p-p non-modulated chrome
signal into Pin 20.
(2) : Pin 10 and Pin 12 are opened.
(3) : Measure the difference between picture period and
blanking period at Pin 9 / Pin 11, that is, "E_rR" /
"E_rB".
(1) : Connect the external power supply to Pin 13, as shown in the figure.
(2) : Apply 4.0 V to Pin 13, and measure the Pin 6 voltage, that is, “V_6color”.
(3) : Apply 2.0 V to Pin 13, and measure the Pin 6 voltage, that is, “V_{6B / W}”.
6
-
Voltmeter V
+
13 ID Current
(1) : Connect the external power supply to Pin 13, as shown in the figure.
(2) : Apply 5.0 V to Pin 13, and measure the Pin 6 current, that is, “I_6strongSE”.
(3) : Apply 4.0 V to Pin 13, and measure the Pin 6 current, that is, “I_6SE”.
(4) : Apply 2.0 V to Pin 13, and measure the Pin 6 current, that is, “I_{6B / W}”.
TA1275 BFNG
4
6
0.01µF
15kΩ
-
A Ammeter
+
56 TB1309FG
(1) : Input a 200 mV_p-p, 15 kHz sine wave into Pin 14 and Pin 16.
(2) : No input on Pin 20.
14 System SW Threshold Level ^{(3) : Increasing the Pin 6 voltage from 0 V, measure the voltage at which the 15 kHz}
sine wave appears at Pin 9 and Pin 11, that is, "V_6PIN".
(4) : Decreasing the Pin 6 voltage from 4 V, measure the voltage at which the 15 kHz
sine wave disappears at Pin 9 and Pin 11, that is, "V_6S".
(1) : No input on Pin 20.
15
Color Difference Output DC
Level
(2) : Measure the DC voltage on Pin 9 / Pin 11 when Pin 6 is 4 V, that is, "V_9PIN" /
"V_11PIN".
(3) : Measure the DC voltage on Pin 9 / Pin 11 when Pin 6 is 0 V, that is, "V_9S" /
"V_11S".
(1) : Input a 75% color bar (200 mV_p-p at R ID) into Pin 20.
(2) : Measure the difference between the picture period and the blanking period at Pin
9 when Pin 10 is 5 V / 0 V, that is, E_rR+ / E_rR−.
(3) : Measure the difference between the picture period and the blanking period at Pin
16
R-Y B-Y Black Level Control
11 when Pin 12 is 5 V / 0 V, that is, E_rB+ / E_rB−.
Characteristics
(4) : Calculate : "∆E_rR+" = E_rR+−E_rR
"∆E_rR−" = E_rR−−E_rR
"∆E_rB+" = E_rB+−E_rB
"∆E_rB−" = E_rB−−E_rB
16
2005-03-14