參數資料
型號: BU1425AK
廠商: Rohm CO.,LTD.
英文描述: NTSC / PAL digital RGB encoder
中文描述: 的NTSC / PAL編碼器,數字RGB
文件頁數: 15/32頁
文件大?。?/td> 307K
代理商: BU1425AK
15
Multimedia ICs
BU1425AK / BU1425AKV
6) Y filter
With the BU1425AK / AKV, the frequency characteristic
of Y, which is mixed with the VOUT pin output, is set so
that it can be selected using the YFILON1B and 2B pins.
A through filter is normally used on the YOUT pin output,
so that it is not limited to this method.
Table 8: Frequency characteristic of the Y channel
YFILON2B
YFILON1B
H
TRAP filter through
(same signal as YOUT pin output is mixed with VOUT)
Frequency characteristic of the Y channel
chart1
chart2
chart3
H
H
L
L
L
H
L
100
– 40
10
20000
10000
1000
A
P
FREQUENCY (kHz)
5
0
– 5
– 10
– 15
– 20
– 25
– 30
– 35
90
45
0
180
135
– 45
– 90
– 135
– 180
Gain-Phase Graphic
Fig.5 chart1 (BCLK = 13.5MHz)
100
– 40
10
20000
10000
1000
A
FREQUENCY (kHz)
5
0
– 5
– 10
– 15
– 20
– 25
– 30
– 35
P
90
45
0
180
135
– 45
– 90
– 135
– 180
Gain-Phase Graphic
Fig.6 chart2 (BCLK = 13.5MHz)
100
– 40
10
20000
10000
1000
A
FREQUENCY (kHz)
5
0
– 5
– 10
– 15
– 20
– 25
– 30
– 35
P
90
45
0
180
135
– 45
– 90
– 135
– 180
Gain-Phase Graphic
Fig.7 chart3 (BCLK = 14.318MHz)
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