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參數(shù)資料
| 型號： | LC7455A |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Closed Caption Signal Extraction IC(從重疊視頻信號中提取接近字符信號的芯片) |
| 中文描述： | 字幕信號提取集成電路（從重疊視頻信號中提取接近字符信號的芯片） |
| 文件頁數(shù)： | 3/13頁 |
| 文件大?。?/td> | 231K |
| 代理商： | LC7455A |
System Block Diagram
No. 5680-3/13
LC7455A, 7455M
Operation in the Different Modes
Pin
Application
equipment
Mode
Operation
MOD1
MOD0
· Even field line 21 data extraction
The internal PLL is operated with the horizontal synchronizing signal separated from the composite video
signal as the reference.
Open
Open
Mode 1
VCR
· Even field line 21 data extraction
An external 508 kHz ceramic oscillator is used, and the internal PLL is operated with that oscillator output
divided by 32 as the reference.
Open
V
DD
Mode 2
VCR
V
DD
Open
Mode 3
NTSC-TV
· Odd and even field line 21 data extraction
The internal PLL is operated with the Hsync signal applied from fly back as the reference.
V
DD
V
DD
Mode 4
PAL-TV
· Odd and even field line 22 data extraction
The internal PLL is operated with the Hsync signal applied from the fly back circuit as the reference.
Note: The data extraction operations in modes 1 and 2 are identical. However, while mode 1 can operate without problem for normal "on air" signals, it may
be difficult for the PLL to lock with signals such as scrambled CATV signals.
PLL reference clock
mode 2
mode 3, 4
mode 1
Data peak hold
(Data slice)
Hsync peak hold
(Hsync slice)
Output control
Data output
buffer
32 circuit
Ocircuit
Pedestal clamp
(Mode 2)
(Mode 2)
(Modes 1, 3, 4)
相關PDF資料 |
PDF描述 |
|---|---|
| LC7455 | Closed Caption Signal Extraction IC |
| LC7456A | U.S. Closed Caption Signal Extraction IC |
| LC7458B-04 | Closed-Caption Decoder LSI |
| LC7461 | Infrared Remote Control Transmitter IC |
| LC7462 | Infrared Remote Control Transmitter IC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LC7455M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Closed Caption Signal Extraction IC |
| LC7456A | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:U.S. Closed Caption Signal Extraction IC |
| LC7458B-04 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Closed-Caption Decoder LSI |
| LC7460 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| LC7461 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Infrared Remote Control Transmitter IC |
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