tda4681wp NXP Semiconductors, tda4681wp Datasheet - Page 19

• Manufacturer Part Number: tda4681wp
• Description: Video Processor With Automatic Cut-off And White Level Control
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1997 Mar 04
handbook, full pagewidth
(with
increased
vertical
blanking
interval)
PAL,
SECAM
NTSC,
PAL M
PAL,
SECAM
Video processor with automatic cut-off
and white level control
(1) Maximum brightness.
(2) Nominal brightness.
621 622 623 624 625 1
white measurement level
for green signal
cut-off measurement level
for green signal
ultra-black level
Fig.8 Leakage current, cut-off and white level current measurement timing diagram.
V component of the sandcastle pulse
2
V component of the sandcastle pulse
V component of the sandcastle pulse
3
vertical blanking interval, 22 complete lines
vertical blanking interval, 19 complete lines
vertical blanking interval, 25 complete lines
Fig.7 Cut-off and white level measurement pulses.
4
5
vertical flyback 850 s
6
(leakage current measurement time)
7
LM
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
LM
LM
19
(1)
(2)
MR MG MB WR
WG
MR MG MB WR
WB
MR MG MB WR
MED701
WG
WG
WB
WB
Product specification
TDA4681
25
cut-off and
white level
measurement
pulses
26
MED702
27 28