Solvetimestep2D

$solvetimestep2D is a command for solving the transient behavior of the device. The format is

$solvetimestep2D
number_of_different_steps(Nt)
steptype contact_type $\delta t ~~   t_{total}$ par1 par2 par3 par4 ....    
steptype contact_type $\delta t ~~   t_{total}$ par1 par2 par3 par4 ....    
...
steptype contact_type $\delta t ~~   t_{total}$ par1 par2 par3 par4 ....    repeat Nt times

The number of parameters depeding on step type. Now we have 3 step types

Steptype  = 1:  

$\delta t,~~ t_{total},~~ vg_0$

 $vg=vg_{end}$ for t<0, for t>0, vg=$vg_0$

Steptype  = 2:  

$\delta t,~~ t_{total},~~ vg_0 ,~~ A_{0} ,~~ \omega,~~ c_{0}$

$vg=vg_{0} +  A_{0} \times sin\left( 2\pi \omega t + c_0 \right)$

Steptype  = 3:  

$\delta t, ~~t_{total},~~ vg_0 ,~~  A_{0} ,~~ \omega ,~~ c_{0}$

$vg=vg_{0} +  int(A_{0} \times sin\left( 2\pi \omega t + c_0 \right))$

contact_type

2: gate
3: source
4: drain

Steptype  = 4:  

$\delta t,~~ t_{total},~~ vg_0$

$vg=vg_{end}$ for t<0, for t>0, vg=$vg_0$ , generation = system generation at t<0 and generation =0 for t> 0 
 

Steptype  = 5:  

$\delta t,~~ t_{total},~~ vg_0 ,~~ \omega ,~~ c_{0}$

$vg=vg_{end}$ for t<0, for t>0, vg=$vg_0$ , generation = system generation at t<0 generation = gen(system)*$(0.5+0.5*cos (2\pi \omega t + c_{0}))$ 
 

Steptype  = 6:  

$\delta t,~~ t_{total},~~ vg_0 ,~~ \omega ,~~ c_{0}$

$vg=vg_{end}$ for t<0, for t>0, vg=$vg_0$ , generation = system generation at t<0 generation = gen(system)*$Int(0.5+0.5*cos (2\pi \omega t + c_{0}))$ 
 

Steptype  = 7:  

$\delta t,~~ t_{total},~~ vg_0 ,~~ \omega ,~~ c_{0}$

$vg=vg_{end}$ for t<0, for t>0, vg=$vg_0$ , generation = 0 at t<0 (Force Steady state to be 0), 
generation = gen(system)*$(0.5+0.5*cos (2\pi \omega t + c_{0}))$ 
 

Steptype  = 8:  

$\delta t,~~ t_{total},~~ vg_0 ,~~ \omega ,~~ c_{0}$

$vg=vg_{end}$ for t<0, for t>0, vg=$vg_0$ , generation = 0 at t<0 (Force Steady state to be 0),
generation =gen(system)*$Int(0.5+0.5*cos (2\pi \omega t + c_{0}))$ 
 

For example:

$solvetimestep2D
2
2 2 1.0e-10 1.0e-6 3.00 0.1 1.0e6 0.0 
2 4 1.0e-10 1.0e-6 3.00 0.1 1.0e6 0.0 
 $vg=3.0 + 0.1 \times sin\left( 2\pi \times 10^{6} t  \right)$

 $vd=3.0 + 0.1 \times sin\left( 2\pi \times 10^{6} t  \right)$

related:
$savetimestep2D