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參數(shù)資料
| 型號： | LA7642N |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | SECAM Format Color TV Chrominance Circuit |
| 中文描述： | SECAM格式彩色電視色度電路 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 64K |
| 代理商： | LA7642N |
No. 5693-3/6
LA7642N
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Input a color bar signal (0 dB) to pin 14. In the
pin 6 (R-Y) output waveform measure the
amplitude of the blue green (+280 kHz) and
red (–280 kHz) components (A) and measure
the amplitude of the blue (+45 kHz) and
yellow (–45 kHz) components (B). Calculate
the value of LINRY from the following formula.
LINRY = (A/B)
×
(90/560)
×
100 (%)
Measure the peak value of the pin 7 ALC
pulse signal.
Referenced to the blanking period DC level.
R-Y linearity
LINRY
100
115
%
ALC pulse height
VALC
180
200
220
mVp-p
Blanking period B-Y DC voltage
VALC
The pin 7 blanking period DC level.
3.8
4.1
4.4
V
Blanking period R-Y DC voltage
VRYBLK
The pin 6 blanking period DC level.
3.8
4.1
4.4
V
The pin 7 output impedance. For reference
only.
Input a color bar signal (0 dB) to pin 14 and
measure the pin 7 B-Y amplitude Vb (V p-p).
Next, connect a 2-k
resistor between pin 7
and ground and measure the pin 7 B-Y
amplitude Vwrb (V p-p). Derive ZBYS from
the following formula.
ZBYS = (Vb – Vwrb)/Vwrb
×
2k (
).
The pin 6 output impedance. For reference
only.
Input a color bar signal (0 dB) to pin 14 and
measure the pin 6 R-Y amplitude Vr (V p-p).
Next, connect a 2-k
resistor between pin 6
and ground and measure the pin 6 R-Y
amplitude Vwrr (V p-p). Derive ZRYS from
the following formula.
ZRYS = (Vr – Vwrr)/Vwrr
×
2k (
).
The pin 7 output impedance. For reference
only.
Apply a 4-V signal to pin 7 (B-Y), measure
the influx current Ib, and derive ZBY from the
following formula. ZBY = 4/Ib (M
)
The pin 6 output impedance. For reference
only.
Apply a 4-V signal to pin 6 (R-Y), measure
the influx current Ir, and derive ZRY from the
following formula. ZRY = 4/Ir (M
)
The DC difference between the pin 7 no
signal period DC level and the signal period
DC level for a black-and-white signal.
Measure DBY (V) and calculate BBBY from
the following formula.
BBBY = DBY
×
460/VBY kHz
The DC difference between the pin 6 no
signal period DC level and the signal period
DC level for a black-and-white signal.
Measure DRY (V) and calculate BBRY from
the following formula.
BBRY = DRY
×
460/VRY kHz
SECAM output impedance: B-Y
ZBYS
150
SECAM output impedance: R-Y
ZRYS
150
Output impedance
Non-SECAM: B-Y
ZBY
10
M
Output impedance
Non-SECAM: R-Y
ZRY
10
M
Black level error B-Y
BBBY
–5
0
+5
kHz
Black level error R-Y
BBRY
–5
0
+5
kHz
[De-Emphasis Characteristics]
Input a signal to which a 63-kHz modulation
has been applied to pin 14 and measure the
pin 7 B-Y amplitude Vbon (V p-p) when
preemphasis is on. Next, turn off pre-
emphasis, measure the pin 7 B-Y amplitude
Vboff (V p-p), and calculate DE63B from the
following formula.
DE63B = 20
×
log (Vboff/Vbon) (dB)
De-emphasis 63k B-Y
DE63B
–1.0
–2.6
–4.0
dB
Continued from preceding page.
Continued on next page.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA7655N | 1-Chip IC for Color TV Signal Processing |
| LA76600M | Monolithic Linear IC Video Signal Y/C Separator IC |
| LA7668N | Video Signal Auto-White Processing IC |
| LA7668 | Video Signal Auto-White Processing IC |
| LA7670 | PLL type video detector for the high picture & sound quality |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA7655N | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1-Chip IC for Color TV Signal Processing |
| LA76600M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Linear IC Video Signal Y/C Separator IC |
| LA7668 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Video Signal Auto-White Processing IC |
| LA7668N | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Video Signal Auto-White Processing IC |
| LA7670 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL type video detector for the high picture & sound quality |
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