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TMC2193KJC 데이터시트(PDF) 27 Page - Cadeka Microcircuits LLC.

부품명 TMC2193KJC
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제조업체  CADEKA [Cadeka Microcircuits LLC.]
홈페이지  http://www.cadeka.com
Logo CADEKA - Cadeka Microcircuits LLC.

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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 (fS/4 to 3fS/4, where fS 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
0
0.2
0.4
0.6
0.8
1
Frequency (Pixel rate)
-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)
Address
Bit(s)
Name
0x11
4
SINEN
Address
Bit(s)
Name
0x10
7
DAC4DIS
0x10
6
DAC3DIS
0x10
5
DAC2DIS
0x10
4
DAC1DIS
0x10
1-0
OUTMODE
0x11
6
OFMT
0x11
3
REFSEL
0x3F
7
SEL_CLK
0x3F
4
SEL_PIX
-2
-1.5
-1
-0.5
0
0.5
1
1.5
0
0.1
0.2
0.3
0.4
0.5
Normalized Frequency (PXCK)
Compensated
D/A Output
Sin(x)/x D/A Roll-Off
X/Sin(x) Filter
Table 17. D/A Outputs
Description
Ref. DAC
DAC1
DAC2
DAC3
DAC4
RGB
ref.
Green
Blue
Red
Comp2/overlay
Y PB PR
ref.
Y
PB
PR
Comp2/overlay
S-VIDEO
ref.
Comp1
Y
Chroma
Comp2/overlay



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