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参数资料
| 型号： | EL2090CN |
| 元件分类： | 视频放大器 |
| 英文描述： | 100 MHz DC-Restored Video Amplifier |
| 中文描述： | 100兆赫的DC -恢复视频放大器 |
| 文件页数： | 12/12页 |
| 文件大小： | 260K |
| 代理商： | EL2090CN |
EL2090C
100 MHz DC-Restored Video Amplifier
Applications Information
Contd
a saturation voltage we prevent this node from
approaching the positive rail
The maximum
voltage is set by the resistive voltage divider (be-
tween Va and GND) R1 and R2 plus a diode
This value can be adjusted if the maximum size
of the input signal is known The diode used is an
off-the-shelf 1N914 or 1N916
As is true of all 100 MHz amplifiers good by-
passing of the supplies to ground is mandatory
1
mF tantalums are sufficient and 001 mF leaded
chip capacitors in parallel with medium value
electrolytics are also good Leads longer than
can induce a characteristic 150 MHz resonance
and ringing
The VINb of the video amplifier should have the
absolute minimum of parasitic capacitance Stray
capacitance of more than 3 pF will cause peaking
and compromise the gain flatness The band-
width of the amplifier is fundamentally set by
the value of Rf As demonstrated by the frequen-
cy response versus gain graph the peaking and
bandwidth is a weak function of gain
The
EL2090 was designed for Rf e 300
X giving opti-
mum gain flatness at Av ea2 Unity-gain re-
sponse is flattest for Rf e 360
X gains of a5 can
use Rf e 270
X In situations where the peaking
is accentuated by load capacitance or binput ca-
pacitance the value of Rf will have to be in-
creased and some bandwidth will be sacrificed
The VINa of the video amplifier should not look
into an inductive source impedance If the source
is physically remote and a terminated input line
is not provided it may be necessary to connect
an input ‘‘snubber’’ to ground A snubber is a re-
sistor in series with a capacitor which de-Q’s the
input resonance Typical values are 100
X and
30 pF
The output of the video amplifier is sensitive to
capacitive loads greater than 25 pF and a snub-
ber to ground or a resistor in series with the out-
put is useful to isolate reactive loads
9
相关PDF资料 |
PDF描述 |
|---|---|
| EL2090C | 100 MHz DC-Restored Video Amplifier(100 MHz直流恢复型视频放大器) |
| EL2099CT | Video Distribution Amplifier |
| EL2099C | High Speed,Video Distribution Amplifier(高速视频分配放大器) |
| EL2120C | 100 MHz Current Feedback Amplifier(100 MHz电流反馈放大器) |
| EL2120 | 100 MHz Current Feedback Amplifier |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EL2099 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Video Distribution Amplifier |
| EL2099C | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:Video Distribution Amplifier |
| EL2099CT | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Video Distribution Amplifier |
| EL20X | 制造商:EVERLIGHT 制造商全称:Everlight Electronics Co., Ltd 功能描述:8 PIN SOP PHOTOTRANSISTOR |
| EL21 | 制造商:Velleman Inc 功能描述: |
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