General Form:
EXP(V1 V2 TD1 TAU1 TD2 TAU2)
Examples:
VIN 3 0 EXP(-4 -1 2NS 30NS 60NS 40NS)
parameter default value units
---------------------------------------------------------
V1 (initial value) Volts or Amps
V2 (pulsed value) Volts or Amps
TD1 (rise delay time) 0.0 seconds
TAU1 (rise time constant) TSTEP seconds
TD2 (fall delay time) TD1+TSTEP seconds
TAU2 (fall time constant) TSTEP seconds
The shape of the waveform is described by the following table:
time value
---------------------------------------------------------------------
0 to TD1 V1
| -(t - TD1)|
TD1 to TD2 V1 + (V2-V1).|1-e ----------|
| TAU1 |
| -(t - TD1)| | -(t - TD2)|
TD2 to TSTOP V1 + (V2-V1).|1-e ----------| + (V1-V2).|1-e ---------|
| TAU1 | | TAU2 |