6.             #vmax  --- full-bridge inverter PWM generator input
40.e-9         #deadtime or leadtime
5.e-9         #rise/fall time 
100.           #ACline frequency for one halfbridge
-90.             #ACline sine wave initial phase angle in degrees
250000.         #switching freq
3              #number of ACline cycle to generate PWM
-9999        #if positive, the on-time of double pulse trigger pulse
