How about a resistor with a parameterized value. Define v_sweep to vary from 1 to 1000 volts. When it equals 0 volts then r_variable will be 0 ohms. When v_sweep equals 1000 volts r_variable will equal 1000 ohms. Make v_sweep a sawtooth (or a sawtooth, or a PWL waveform, or whatever you need) and adjust the period so that it ramps from min to max in 1 ns. . r_variable terminal_1 terminal_2 r = v_sweep The details are left to the interested.......... (customize as desired) Ray Anderson Staff SI Engineer Sun Microsystems David Kaiser wrote: >Can anyone show me how to build a resistor in HSPICE that varys in value= > from 1000 Ohms to 1 ohm in about 1ns and visa-versa? >I suppose I could use a FET, but I don't have enough experience with= > transistors in HSPICE to do this myself. >Thanks in advance. > >David Kaiser >4 McDATA Pkwy. >Broomfield, CO 80021 >(720) 558-4431 >david.kaiser@xxxxxxxxxx > > >. > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu