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參數(shù)資料
| 型號： | EL4441CN |
| 元件分類： | 視頻放大器 |
| 英文描述： | Multiplexed-Input Video Amplifiers |
| 中文描述： | 復(fù)用輸入視頻放大器 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 334K |
| 代理商： | EL4441CN |
EL4421C22C41C42C43C44C
Multiplexed-Input Video Amplifiers
Applications Information
Contd
The logic input(s) and ground pin are shifted
25V above system ground to correctly bias the
mux-amp Of course all the signal inputs and
output will have to be shifted 25V above system
ground to ensure proper signal path biasing
A final caution the ground pin is also connected
to the IC’s substrate and frequency compensation
components The ground pin must be returned to
system ground by a short wire or nearby bypass
capacitor In figure 2 the 22 K
X resistors also
serve to isolate the bypassed ground pin from the
a
5V supply noise
Signal Amplitudes
Signal input and output voltages must be be-
tween (Vb)a25V and (Va)b25V to ensure
linearity Additionally the differential voltage on
any input stage must be limited to g6V to pre-
vent damage In unity-gain connections any in-
put could have g3V applied and the output
would be at g3V putting us at our 6V differen-
tial limit Higher-gain circuit applications divide
the output voltage and allow for larger outputs
For instance at a gain of a2 the maximum input
is again g3V and the output swing is g6V The
EL4443 or EL4444 can be wired for inverting
gain with even more amplitude possible
The output and positive inputs respond to over-
loading amplitudes correctly that is they simply
clamp and remain monotonic with increasing
a
input overdrive A condition exists however
where the binput of an active stage is overdriven
by large outputs This occurs mainly in unity-
gain connections and only happens for negative
inputs The overloaded input cannot control the
feedback loop correctly and the output can be-
come non-monotonic A typical scenario has the
circuit running on g5V supplies connected for
unity gain and the input is the maximum g3V
Negative input extremes can cause the output to
jump from b3V to around b23V This will nev-
er happen if the input is restricted to g25V
which is the guaranteed maximum input compli-
ance with g5V supplies and is not a problem
with greater supply voltages
Connecting the
feedback network with a divider will prevent the
overloaded output voltage from being large
enough to overload the binput and monotonic
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EL4441CS | Multiplexed-Input Video Amplifiers |
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| EL4422C | Multiplexed-Input Video Amplifier? |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL4441CS | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:Multiplexed-Input Video Amplifiers |
| EL4442C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Multiplexed-Input Video Amplifier? |
| EL4442CN | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:Multiplexed-Input Video Amplifiers |
| EL4442CS | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:Multiplexed-Input Video Amplifiers |
| EL4443C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Multiplexed-Input Video Amplifier? |
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