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參數(shù)資料
| 型號： | GS4981-IKA |
| 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 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 279K |
| 代理商： | GS4981-IKA |
11
520 - 23 - 03
VIDEO
0.01μF
CH1
CH2
2
75
4
8
680k
0.1μ
6
0.1μF
CH1
VIDEO
CH2
2
75
4
8
680k
0.1μ
6
APPLICATION NOTES
(1) Choosing the Appropriate Input Coupling Capacitor to
Optimize Slicing Level and Hum Rejection
The video designer can adjust the slicing level by choosing the
value of the input coupling capacitor. The relationship between
slicing level and input coupling capacitor is described by the
following equation.
V
SLICE
= C
T = V
DROOP
C
where:
I
DIS
= clamp discharge current = 11
μ
A
T = T
LINE
- T
SYNC
= (63.5
μ
s - 4.7
μ
s)
C
C
= input coupling capacitor
I
DIS
137
127
117
107
97
87
77
S
0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10
INPUT COUPLING CAPACITOR (
μ
F)
Fig. 21 Slicing Level vs Input Coupling Capacitor
Figure 21 is a graphical representation of this equation and
photographs 1 and 2 show the input video waveforms
for 0.1
μ
F and 0.01
μ
F input capacitors respectively. The
advantage in choosing a smaller input coupling capacitor, is
increased hum rejection as the following analyses illustrates.
Test Circuit 1
Test Circuit 2
Photograph 2
Photograph 1
CH1
CH2
CH1
CH2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| GS4981-ITA | Monolithic Video Sync Separators |
| GS1881 | Monolithic Video Sync Separators |
| GS1881-CDA | Monolithic Video Sync Separators |
| GS1881-CKA | Monolithic Video Sync Separators |
| GS1881-CTA | Monolithic Video Sync Separators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| GS4981-IKAE3 | 制造商:Semtech Corporation 功能描述:Sync Separators |
| GS4981ITA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| GS4981-ITA | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:Monolithic Video Sync Separators |
| GS4981-ITAE3 | 制造商:Semtech Corporation 功能描述:TAPE & REEL Sync Separators |
| GS4982 | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:Video Sync Separators with 50% Sync Slicing |
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