參數(shù)資料
型號(hào)： TMC22091KHC
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： Digital Video Encoders/Layering Engine
中文描述： COLOR SIGNAL ENCODER, PQFP100
封裝： 3.20 MM HEIGHT, MQFP-100
文件頁(yè)數(shù)： 45/60頁(yè)
文件大?。?/td> 293K
代理商： TMC22091KHC
PRODUCT SPECIFICATION
TMC22091/TMC22191
45
Filtering
The TMC22x91 incorporates internal digital filters to estab-
lish appropriate bandwidths and simplify external analog fil-
ter designs.
Color-Difference Low-Pass Filters
The color-difference low-pass filters in the TMC22x91
establish chrominance bandwidths which meet the specifica-
tions outlined in CCIR Report 624-3, Table II, Item 2.6, for
system I over a range of pixel rates from 12.27 Mpps to
14.75 Mpps. Equal bandwidth is established for both color-
difference channels.
Figure 26. Color-Difference Low-Pass Filter Response
Interpolation Filters
The Chroma Modulator output and the luminance data path
are digitally filtered with sharp-cutoff low-pass interpolation
filters. These filters ensure that aliased subcarrier, chromi-
nance, and luminance frequencies are sufficiently suppressed
in 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).
0
0
-10
-20
-30
A
Frequency (MHz)
-40
-50
-60
-70
-80
-90
1
2
3
4
5
6
7
8
24363A
f = 14.27 Mpps
CCIR Rep 624 Specification
C
f = 12.27 Mpps
Since these are fixed-coefficient digital filters, their filter
characteristics depend upon clock rate. Figures 26 and 27
show the frequency response for two pixel rates, 12.27 MHz
and 14.75 MHz.
Figure 27. Chroma Modulator and Luminance
Interpolation Filter Full Spectrum Response
Figure 28. Chroma Modulator and Luminance
Interpolation Filter Passband Detail
All digital-to-analog reconstruction systems exhibit a high
frequency roll-off as a result of the zero-order hold charac-
teristic of D/A converters. This response is commonly
referred to as a sin(x)/x response. It is a function of the sam-
pling rate of the output D/A.
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
A
Frequency (MHz)
3
6
9
12
15
24394A
f = 14.75 Mpps
f = 12.27 Mpps
0
0
-1
-2
-3
A
Frequency (MHz)
-4
1
2
3
4
5
6
24365A
7
f = 14.75 Mpps
f = 12.27 Mpps
Figure 25. Frequency/Phase Data Transfer
4
PXCK
PIXEL
PIXEL
PIXEL
24383A
FREQUENCY
PHASE
FIELD IDENTIFICATION
0
1
2
3
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
PIXEL
PIXEL
FID f
23:20
f
19:16
f
15:12
f
11:8
f
7:4
f
3:0
φ
23:20
φ
19:16
φ
15:12
φ
11:8
φ
7:4
φ
3:0
GHSYNC
CVBS7-0
相關(guān)PDF資料
PDF描述
TMC22191KHC Digital Video Encoders/Layering Engine
TMC22091R0C Digital Video Encoders/Layering Engine
TMC22191R0C Digital Video Encoders/Layering Engine
TMC22091 Digital Video Encoders(數(shù)字視頻編碼器)
TMC22191 Digital Video Encoders(數(shù)字視頻編碼器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TMC22091R0C 功能描述:視頻 IC D/V Encoder Layering Engine RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TMC22091R0CT 功能描述:視頻 IC D/V Encoder Layering Engine RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TMC22091ROC-T 制造商:Fairchild Semiconductor Corporation 功能描述:
TMC22151AKHC 制造商:CADEKA 制造商全稱:CADEKA 功能描述:Multistandard Digital Video Decoder Three-Line Adaptive Comb Decoder Family, 8 & 10 bit
TMC22151KHC 制造商:Rochester Electronics LLC 功能描述:- Bulk
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