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参数资料
| 型号： | EL4093CS |
| 元件分类： | 视频放大器 |
| 英文描述： | 300 MHz DC-Restored Video Amplifier |
| 中文描述： | 300兆赫的DC -恢复视频放大器 |
| 文件页数： | 16/16页 |
| 文件大小： | 342K |
| 代理商： | EL4093CS |
EL4093C
300 MHz DC-Restored Video Amplifier
Applications Information
Product Description
The EL4093C is a high speed DC-restore system
containing a current feedback amplifier (CFA)
and a sample
hold (SH) amplifier The CFA
offers a wide 3 dB bandwidth of 300 MHz and a
slew rate of 1500 V
ms making it ideal for high
speed video applications such as SVGA
The
CFA’s excellent differential gain and phase at
358 MHz also makes it suitable for NTSC appli-
cations Drawing only 95 mA on g5V supplies
the EL4093C serves as an excellent choice for
those applications requiring both low power and
high bandwidth
The connection between the CFA and sample
hold (the Autozero interface) has been greatly
simplified The output of the sample
hold is a
high impedance current source allowing direct
connection to the CFA inverting input for au-
tozero purposes
In addition
special circuitry
within the sample
hold provides a charge cur-
rent of 85 mA in sample mode resulting in a
sample hold current ratio (ratio of charging cur-
rent to droop current) of approx 1000000
Theory of Operation
In video applications DC restoration moves the
backporch or black level to a fixed DC reference
The EL4093C uses a CFA in feedback with a
sample
hold to provide DC restoration Figure
1 shows how the two are connected to provide
this function the SH compares the output of
the CFA to a DC reference and any difference
between them causes an output current from the
SH This ‘‘autozero’’ current is fed to the CFA
inverting input the effect of which is to move the
CFA output towards the reference voltage This
autozero mechanism settles when the CFA out-
put is one VOS away from the reference (the VOS
here refers to the SH offset voltage)
44093 – 3
Figure 1
The autozero mechanism is typically active for
only a short period of each video line Figure 2
shows a NTSC video signal along with the
EL4581C back porch output The back porch sig-
nal is used to drive the HOLD input of the
EL4093C and we see that the EL4093C is in
sample mode for only 35
ms of each line It is
during this time that the autozero mechanism at-
tempts to drive the CFA output towards the ref-
erence voltage at the same time putting a correc-
tion voltage onto the hold capacitor CHOLD
During the rest of the line (60
ms) the EL4093C is
in hold mode but DC correction is maintained by
the voltage on CHOLD
44093 – 37
Figure 2
9
相关PDF资料 |
PDF描述 |
|---|---|
| EL4093C | 300 MHz DC-Restored Video Amplifier(300MHz 直流恢复放大器) |
| EL4094C | Video Gain Control/Fader(视频增益控制器/信号渐弱器) |
| EL4094 | Video Gain Control/Fader |
| EL4094CN | Video Gain Control/Fader |
| EL4094CS | Video Gain Control/Fader |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EL4093CS-T13 | 功能描述:IC VIDEO AMP 300MHZ 16-SOIC RoHS:否 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 标准包装:1,000 系列:- 应用:驱动器 输出类型:差分 电路数:3 -3db带宽:350MHz 转换速率:1000 V/µs 电流 - 电源:14.5mA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 供应商设备封装:20-QFN 裸露焊盘（4x4） 包装:带卷 (TR) |
| EL4093CS-T7 | 功能描述:IC VIDEO AMP 300MHZ 16-SOIC RoHS:否 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 标准包装:1,000 系列:- 应用:驱动器 输出类型:差分 电路数:3 -3db带宽:350MHz 转换速率:1000 V/µs 电流 - 电源:14.5mA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 供应商设备封装:20-QFN 裸露焊盘（4x4） 包装:带卷 (TR) |
| EL4093CSZ | 功能描述:IC VIDEO AMP 300MHZ 16-SOIC RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 标准包装:1,000 系列:- 应用:驱动器 输出类型:差分 电路数:3 -3db带宽:350MHz 转换速率:1000 V/µs 电流 - 电源:14.5mA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 供应商设备封装:20-QFN 裸露焊盘（4x4） 包装:带卷 (TR) |
| EL4093CSZ | 制造商:Intersil Corporation 功能描述:Video Buffer / Amplifier IC |
| EL4093CSZ-T13 | 功能描述:IC VIDEO AMP 300MHZ 16-SOIC RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 标准包装:1,000 系列:- 应用:驱动器 输出类型:差分 电路数:3 -3db带宽:350MHz 转换速率:1000 V/µs 电流 - 电源:14.5mA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 供应商设备封装:20-QFN 裸露焊盘（4x4） 包装:带卷 (TR) |
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