- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄30734 > LC749870LG (SANYO SEMICONDUCTOR CO LTD) SPECIALTY CONSUMER CIRCUIT, PBGA64 PDF資料下載
參數(shù)資料
| 型號： | LC749870LG |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA64 |
| 封裝： | 5 X 5 MM, FLGA-64 |
| 文件頁數(shù)： | 25/44頁 |
| 文件大?。?/td> | 538K |
| 代理商： | LC749870LG |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁當(dāng)前第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
LC749870LG
No.A1765-31/44
AGC Mode and Non-AGC Mode
Switch between non-AGC mode and AGC mode using I2C_SCARTON.
Non-AGC mode is used when the amplitude of the video signal is steady in the environment of an strong electric field.
The maximum of the sync tip clamped analog video input amplitude assumes 1.0Vp-p in non-AGC mode. The ADC
full-scale input range is fixed at 1.4Vp-p.
AGC mode is used when the amplitude of the video signal is unsteady in the environment of a weak electric field. The
maximum of the sync tip clamped analog video input amplitude assumes a value no greater than from 0.7Vp-p (-3dB)
to 1.4Vp-p (+3dB) in AGC mode. Because the AFEVRTC is controlled according to the amplitude of SYNC detected
by the decoder, AGC mode is enabled by varying the ADC full-scale input range.
3. Data Interpolator
Data interpolator converts the input video signal sampled at 27MHz into 4fsc data. Supported video systems are shown
in the following table.
Table 2 Supported Video System
Input
Output
Video System
Sampling clock
Data transfer rate
Clock lock method
NTSC
27MHz
14.318180MHz
Burst lock
PAL-B, G, D, K, I
27MHz
17.734476MHz
Burst lock
PAL-M
27MHz
14.302444MHz
Burst lock
PAL-N
27MHz
14.328224MHz
Burst lock
NTSC4.43
27MHz
17.734476MHz
Burst lock
PAL-60
27MHz
17.734476MHz
Burst lock
SECAM
27MHz
13.5MHz
H lock
4. APC (Auto Phase Control)
In order to burst lock input video signals, the APC circuit detects the color burst phase error. The data interpolation
coefficient is calculated using the detected phase error, and is then output to the data interpolator circuit. It is equipped
with a function to turn on the color killer when not burst-locked, and also has an ACC circuit to maintain the amplitude
of the carrier chrominance signal at a constant level.
5. AGC (Auto Gain Control)
The AGC keeps the sync level constant by automatically calculating an appropriate gain value from the input video
signal sync level and amplifying the input video signal. Because the AGC circuit includes a time constant circuit,
following rapid changes in the input video signal can be suppressed.
Fig.2 Waveform Change Before and After AGC
Sync level
Pedestal level
Sync tip level
After AGC
Before AGC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LC749870W | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| LC749880T | SPECIALTY CONSUMER CIRCUIT, PQFP120 |
| LC749880T | SPECIALTY CONSUMER CIRCUIT, PQFP120 |
| LC75010W | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| LC75010W | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC749870W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Silicon gate NTSC/PAL/SECAM Digital Video Decoder |
| LC749880T | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Silicon gate Image controller LSI for LCD-TV |
| LC749880T-E | 功能描述:視頻 IC 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 |
| LC74FCT162245T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LC74FCT16245T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual 8-bit Bus Transceiver |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。