$solvetimestep

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

$solvetimestep
steptype
parameters(1) parameters(2) ....    

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

Steptype  = 1:  

$\delta t,t_{total},v{g}_0$

 vg=vg_end for t<0, for t>0, vg=$v{g}_0$

Steptype  = 2:  

$\delta t,t_{total},v{g}_0,A_0,\omega ,{\omega }_0$

vg=vg_0 +  A_{0} \times sin\left( 2\pi \omega t + \omega_0 \right)  for t<0, for t>0, vg=$v{g}_0$

Vgnow= vg0+ vga*0.5*sin(  2*pi*freW0*tnow +vgphase)

Steptype  = 3:  

$\delta t,t_{total},v{g}_0,A_0,\omega ,{\omega }_0$