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参数资料
| 型号： | EL2082CS |
| 英文描述： | Current-Mode Multiplier |
| 中文描述： | 电流模式乘数 |
| 文件页数： | 7/16页 |
| 文件大小： | 357K |
| 代理商： | EL2082CS |
EL2082C
Current-Mode Multiplier
Applications Information
Contd
A negative impedance is simply an impedance whose current flows reverse to the normal sense In the
above circuit the current through Z is replicated by the EL2082 and inverted (IOUT flows inverted to
the sense of IIN in the EL2082) and summed back to the input When Vg e 0orVg k 0 the input
impedance is simply Za95
X When Vg e 1V the negative of the current through Z is summed with
the input and the input impedance is ‘‘infinite’’ When Vg e 2V twice the negative of the current
through Z is summed with the input resulting in an input impedance of bZ–95
X
Thus variable capacitors can be simulated by substituting the capacitor as Z ‘‘Negative’’ capacitors
result for Vgl1V and capacitance needs to be present in parallel with the input to prevent oscillations
Inductors or complicated networks also work for Z but a net negative impedance will result in oscilla-
tions
EL2082 Macromodel
This macromodel has been designed to work with PSPICE (copywritten by the Microsim Corporation)
E500 buffers in the VIN voltage and presents it to the RINI resistor to emulate the IIN pin E501
supplies the non-linearity of the current channel and replicates the IIN current to a ground referenced
voltage R500 and C500 provide the bandwidth limitation on the current signal E502 supplies the
VGAIN non-linearity and drives the L501R501C501 to shape the gain control frequency response
E503 does the actual gain-control multiplication and drives delay line T500 to better simulate the
actual phase characteristics of the part G500 creates the current output and ROUT with COUT provide
proper output parasitics
Schematic of
EL2082 Macromodel
2082 – 26
The model is good at frequency and linearity estimates around Vg e 1V and nominal temperatures but
has several limitations
The Vg channel does not give zero gain for
Vg k 0
the output gain reverses – don’t use
Vg k 0
The Vg channel is not slew limited
Frequency response does not vary with supply
voltage
The VIN channel is not slew limited
Noise is not modeled
Temperature effects are not modeled
CMRR and PSRR are not modeled
Frequency response does not vary with Vg
Unfortunately the polynomial expressions and two-input multiplication may not be available on every
simulator Results have been confirmed by laboratory results in many situations with this macromodel
within its capabilities
15
相关PDF资料 |
PDF描述 |
|---|---|
| EL2082 | Current-Mode Multiplier |
| EL2082C | Current-Mode Multiplier(电流模式乘法器) |
| EL2090CM | 100 MHz DC-Restored Video Amplifier |
| EL2090CN | 100 MHz DC-Restored Video Amplifier |
| EL2090C | 100 MHz DC-Restored Video Amplifier(100 MHz直流恢复型视频放大器) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EL2082J | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Multiplier |
| EL208-V | 功能描述:晶体管输出光电耦合器 Optocouplers RoHS:否 制造商:Vishay Semiconductors 输入类型:DC 最大集电极/发射极电压:70 V 最大集电极/发射极饱和电压:0.4 V 绝缘电压:5300 Vrms 电流传递比:100 % to 200 % 最大正向二极管电压:1.65 V 最大输入二极管电流:60 mA 最大集电极电流:100 mA 最大功率耗散:100 mW 最大工作温度:+ 110 C 最小工作温度:- 55 C 封装 / 箱体:DIP-4 封装:Bulk |
| EL2090 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:100MHz DC-Restored Video Amplifier |
| EL2090C | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:100 MHz DC-Restored Video Amplifier |
| EL2090CM | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:100MHz DC-Restored Video Amplifier |
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