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參數(shù)資料
| 型號： | TMC2193 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 10 Bit Encoder |
| 中文描述： | 10位編碼器 |
| 文件頁數(shù)： | 27/72頁 |
| 文件大?。?/td> | 448K |
| 代理商： | TMC2193 |
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PRODUCT SPECIFICATION
TMC2193
REV. 1.0 3/26/03
27
Interpolation Filters
Each video output on the TMC2193 is digitally filtered with
sharp-cutoff low-pass interpolation filters. These filters
ensure that the frequency band above base-band video and
below the pixel frequency (f
S
/4 to 3f
S
/4, where f
S
is the
PXCK frequency) are sufficiently suppressed.
Since these are fixed-coefficient digital filters, their filter
characteristics depend upon clock rate.
Figure 18. Interpolation Filter
Figure 19. Interpolation Filter
–
Passband Detail
x/Sin(x) Filter
Control Registers for this section
The TMC2193 contains a selectable X/sin(X) filter prior to
each DAC. The X/sin(X) filter boosts the high frequency
data to negate the sin(X)/X roll-off associated with D/A con-
verters.
Figure 20. X/SIN(X) Filter
Output Data Formats
Control Registers for this section
The selection of the output format is determined by the
OUTMODE control register.
-80
-70
-60
-50
-40
-30
-20
-10
10
0
6
0
0.2
0.4
0.6
0.8
1
Frequency (Pixel rate)
A
-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0
0.5
0
0.1
0.2
0.3
0.4
0.5
Frequency (Pixel rate)
A
6
Address
0x11
Bit(s)
4
Name
SINEN
Address
0x10
0x10
0x10
0x10
0x10
0x11
0x11
0x3F
0x3F
Bit(s)
7
6
5
4
1-0
6
3
7
4
Name
DAC4DIS
DAC3DIS
DAC2DIS
DAC1DIS
OUTMODE
OFMT
REFSEL
SEL_CLK
SEL_PIX
-2
-1.5
-1
-0.5
0
0.5
1
1.5
0
0.1
Normalized Frequency (PXCK)
0.2
0.3
0.4
0.5
A
6
Compensated
D/A Output
Sin(x)/x D/A Roll-Off
X/Sin(x) Filter
Table 17. D/A Outputs
Description
RGB
Y P
B
P
R
S-VIDEO
Ref. DAC
ref.
ref.
ref.
DAC1
Green
Y
Comp1
DAC2
Blue
P
B
Y
DAC3
Red
P
R
Chroma
DAC4
Comp2/overlay
Comp2/overlay
Comp2/overlay
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