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參數(shù)資料
| 型號(hào)： | ML6440 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Multi-Standard 8-bit Adaptive Digital Input Comb Filter(多標(biāo)準(zhǔn)8位自適應(yīng)數(shù)字輸入組合濾波器) |
| 中文描述： | 多標(biāo)準(zhǔn)的8位數(shù)字輸入自適應(yīng)梳狀濾波器（多標(biāo)準(zhǔn)8位自適應(yīng)數(shù)字輸入組合濾波器） |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 227K |
| 代理商： | ML6440 |
ML6440
15
PERFORMANCE DATA
COMB FILTER PERFORMANCE
Unrestricted Bandwidth. No band-limiting is performed
on the signal when the comb is on hence preventing a
signal loss.
High frequency peaking allows for gentle transitions
from comb to notch modes.
Spurious sub-carrier supression by 48dB removes color
sub-carrier which otherwise can cause large area dot
crawl
NOTCH FILTER PERFORMANCE
When invoked by adaption threshold logic, hanging dot
suppression is 35dB.
ADAPTIVE THRESHOLD PERFORMANCE
Seven fixed values to select threshold, the 8th value is
for automatic self-adjusting threshold mode.
Adaptive thresholds improve around 10% per threshold
level. However, adaptive thresholds can surpass
optimum threshold thus causing smearing effects.
D[6:4] = 000 is the automatic self-adjusting threshold
mode. D[6:4] = 001 is the low threshold and D[6:4] =
111 is the highest threshold, D[6:4] = 010 to 110 is
therefore the intermediate thresholds.
Figures 11 through 20 show the bandwidth of notch,
chroma bandpass, and comb filters for NTSC and PAL
video. These curves were taken from a VM700 using a
sweep frequency pattern using a TG2000 on the
ML6440EVAL board.
Figure 11 shows the NTSC luma filter at CCIR clock rates.
This shows significant notch from 3.3MHz to 4MHz
sufficient for hanging dot suppression. Figure 12 shows
the NTSC chroma bandpass filter for CCIR clock rates
where the filter at 3dB ranges from 3MHz to 4.5Mhz.
Figure 13 shows the luma notch filter for NTSC for
hanging dot suppression for Square Pixel clock rates. This
notch ranges from 3.3MHz to 4MHz. Figure 14 shows the
NTSC chroma bandpass filter running at Square Pixel
clock rates where it at 3dB ranges from 3MHz to 4.5MHz.
Figure 15 shows PAL luma response for hanging dot
suppression at Square Pixel clock rates where notch
ranges from 3.3MHz to 4MHz. Figure 16 shows the
response of the PAL chroma bandpass filter where at 3dB
down ranges from 3MHz to 4.2MHz. Figure 17 shows the
PAL notch filter for luma hanging dot suppression at CCIR
clock rates where the notch ranges from 4MHz to 4.3MHz
at zero amplitude. Figure 18 shows the bandpass filter for
PAL at the CCIR clock rate where at 3dB down ranges
from 3.3MHz to 4.7MHz. Figure 19 shows the NTSC
luma comb response over a line-to-line in phase
frequency sweep to 6MHz for CCIR clock rates. Figure 20
shows the NTSC luma response over a line-to-line in
phase frequency sweep to 6MHz for Square Pixel clock
rate.
Figure 11. NTSC Luma Notch Filter CCIR
A
FREQUENCY (MHz)
1.5
1.0
0.5
0
–0.5
0
2
6
4
1
3
5
Figure 12. NTSC Chroma Band Phase Filter, CCIR
A
FREQUENCY (MHz)
1.5
1.0
0.5
0
–0.5
0
2
6
4
1
3
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML6460 | CCIR656 NTSC Video Encoder(CCIR656標(biāo)準(zhǔn)NTSC視頻編碼器) |
| ML6509 | Active SCSI Terminator(SCSI系統(tǒng)的有源終端器) |
| ML6510 | Series Programmable Adaptive Clock Manager(系列可編程自適應(yīng)時(shí)鐘管理器) |
| ML6516244 | 16-Bit Buffer/Line Driver with 3-State Outputs(BiCMOS 16位緩沖器/線驅(qū)動(dòng)器（三態(tài)輸出）) |
| ML6518 | 18 Line Hot-Insertable Active SCSI Terminator(線熱插入有源SCSI終端器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML6440CH | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Multi-Standard 8-bit Adaptive Digital Input Comb Filter |
| ML645PTA102MLZ | 制造商:COILCRAFT 制造商全稱:Coilcraft lnc. 功能描述:High Reliability Power Inductors |
| ML6460 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:NTSC Video Encoder with Macrovision |
| ML6460CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:NTSC Video Encoder with Macrovision |
| ML6461 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:NTSC Video Encoder |
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