"$useconstIg" 修訂間的差異
出自 DDCC TCAD TOOL Manual
| (未顯示由 1 位使用者於中間所作的 3 次修訂) | |||
| 行 8： | 行 8： | ||
| − | The Ig_value is the current density of gate ( or Base). The unit is A/cm since it is 2D simulation. |
+ | The Ig_value is the current density of gate ( or Base). The unit is A/cm since it is 2D simulation. '''The Ig is define as (Jpg-Jng). Be careful about the sign''' |
The simulation program need to set Vg = constant and Vd (VC) in a range. Vs (VE) can be treated as emitter. |
The simulation program need to set Vg = constant and Vd (VC) in a range. Vs (VE) can be treated as emitter. |
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| − | The program will try in a Vg bias ranging from <math> Vg |
+ | The program will try in a Vg bias ranging from <math> Vg+V_{trial,min}<Vg< Vg+V_{trial,max} </math> in a minimum Vg interval Vg_step_min. |
Once the current error is within Precision |
Once the current error is within Precision |
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| 行 24： | 行 24： | ||
0.0 |
0.0 |
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$useconstIg |
$useconstIg |
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| − | 1.0e- |
+ | 1.0e-3 -0.2 0.2 1.0e-4 1.0e-3 |
| + | |||
| + | <br>'''<big><big>The $useconstIg setting in GUI interface is here</big></big>''' <br> |
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| + | After setting up the general structure, press '''Material Parameter''' and fill in these fields!<br> |
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| + | [[檔案:2D_useconstIg _fig1.jpg|1200px]] |
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於 2024年10月2日 (三) 21:30 的最新修訂
Since DDCC solver is solved by input bias, therefore it is hard to obtain the exactly desired current density. $useconstIg is a command for the program to get a certain Ig value by tunning the bias itself to reach the required gate current. However, it is very time consuming. This function is used for BJT simulation we Ig is treated as base current to get IC versus V_CE current at a fixed base current density.
$useconstIg Ig_value V_trial_min V_trial_max Vg_step_min Precision
The Ig_value is the current density of gate ( or Base). The unit is A/cm since it is 2D simulation. The Ig is define as (Jpg-Jng). Be careful about the sign
The simulation program need to set Vg = constant and Vd (VC) in a range. Vs (VE) can be treated as emitter. The program will try in a Vg bias ranging fromin a minimum Vg interval Vg_step_min. Once the current error is within Precision
For example $Schottky 1.4 $gatebias 0.9 0.9 0.01 $drainbias 0.5 5.0 0.5 $sourcebias 0.0 $useconstIg 1.0e-3 -0.2 0.2 1.0e-4 1.0e-3
The $useconstIg setting in GUI interface is here
After setting up the general structure, press Material Parameter and fill in these fields!
