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參數(shù)資料
| 型號(hào)： | GS1881-ITA |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Monolithic Video Sync Separators |
| 中文描述： | 單片視頻同步分離器 |
| 文件頁(yè)數(shù)： | 13/14頁(yè) |
| 文件大?。?/td> | 279K |
| 代理商： | GS1881-ITA |
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520 - 23 - 03
VIDEO
0.1μF
CH1
CH2
2
75
560
4
8
680k
0.1μ
6
Photograph 3 shows the amount of sync clipping for a 560
source resistor. A graph of V
CLIP
versus R
S
is shown in
Figure 23, and Figure 24 shows the corresponding capacitor
value for a particular series resistor to provide a corner
frequency of 500 kHz.
In applications where signal levels are small the amount of
attenuation should be minimized. It follows from Figure 23 and
Figure 24 that in order to minimize attenuation a small series
resistor and a larger capacitor to ground should be chosen.
This however, increases the capacitive loading of the signal
source.
Another way to minimize the amount of attenuation is to control
the source resistance seen by the sync separator by using a
PNP emitter follower (Figure 25). A PNP emitter follower works
well to drive the sync separator, and does not require much
DC current because the transistor provides the current when
it is needed during sync. Figure 26 is a typical application
circuit that minimizes sync tip clipping.
Test Circuit 3
Fig. 25 PNP Emitter Follower Buffer
Photograph 3
100
90
80
70
60
50
40
30
20
10
0
0 100 200 300 400 500 600 700
SERIES RESISTOR (
)
V
C
SERIES RESISTOR (
)
0 100 200 300 400 500 600 700
10
9
8
7
6
5
4
3
2
1
0
C
Fig. 23 V
CLIP
vs Series Resistor
Fig. 24 C vs Series Resistor
5.6k
C
C
2
V
CC
75
VIDEO
INPUT
FILTER
4
8
-5V
680k
0.1μ
6
V
CC
6
-5V
C
C
2
75
VIDEO
INPUT
4
8
5.6k
56p
5.6k
680k
0.1μ
Fig. 26 Typical NTSC Application Circuit
CH1
CH2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| GS4881 | Monolithic Video Sync Separators |
| GS4881-CDA | Monolithic Video Sync Separators |
| GS4881-CKA | Monolithic Video Sync Separators |
| GS4881-CTA | Monolithic Video Sync Separators |
| GS4881-IDA | Monolithic Video Sync Separators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| GS1881-ITAE3 | 制造商:Semtech Corporation 功能描述:TAPE & REEL Sync Separators |
| GS18A | 制造商:MEANWELL 制造商全稱(chēng):Mean Well Enterprises Co., Ltd. 功能描述:10~18WAC-DC Single Output Desktop |
| GS18A_11 | 制造商:MEANWELL 制造商全稱(chēng):Mean Well Enterprises Co., Ltd. 功能描述:15~18WAC-DC Single Output Desktop |
| GS18A03 | 制造商:MEANWELL 制造商全稱(chēng):Mean Well Enterprises Co., Ltd. 功能描述:10~18WAC-DC Single Output Desktop |
| GS18A03-P1J | 功能描述:插入式交流適配器 10W 3.3V 3.0A RoHS:否 制造商:Phihong 地區(qū):Universal 安裝風(fēng)格:Wall, Interchangeable Plug 輸入電壓范圍:90 VAC to 264 VAC 輸出端數(shù)量:1 輸出功率額定值:5 W 輸出電壓（通道 1）:5 V 輸出電流（通道 1）:1 A 直流輸出連接器:USB Type A 隨附/必需的交流插頭:Required 商用/醫(yī)用:Commercial 效率:Level V |
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